著者

Shamima Akter Tohru Nakagawa Toru Honda Shuichiro Yamamoto Keisuke Kuwahara Hiroko Okazaki Huanhuan Hu Teppei Imai Akiko Nishihara Toshiaki Miyamoto Naoko Sasaki Takayuki Ogasawara Akihiko Uehara Makoto Yamamoto Taizo Murakami Makiko Shimizu Masafumi Eguchi Takeshi Kochi Ai Hori Satsue Nagahama Kentaro Tomita Maki Konishi Ikuko Kashino Akiko Nanri Isamu Kabe Tetsuya Mizoue Naoki Kunugita Seitaro Dohi for the Japan Epidemiology Collaboration on Occupational Health Study Group

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.82, no.12, pp.3005-3012, 2018-11-24 (Released:2018-11-24)

参考文献数

28

被引用文献数

20

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Background: The effect of smoking on mortality in working-age adults remains unclear. Accordingly, we compared the effects of cigarette smoking and smoking cessation on total and cause-specific mortality in a Japanese working population. Methods and Results: This study included 79,114 Japanese workers aged 20–85 years who participated in the Japan Epidemiology Collaboration on Occupational Health Study. Deaths and causes of death were identified from death certificates, sick leave documents, family confirmation, and other sources. Hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated via Cox proportional hazards regression. During a maximum 6-year follow-up, there were 252 deaths in total. Multivariable-adjusted HRs (95% CIs) for total mortality, cardiovascular disease (CVD) mortality, and tobacco-related cancer mortality were 1.49 (1.10–2.01), 1.79 (0.99–3.24), and 1.80 (1.02–3.19), respectively, in current vs. never smokers. Among current smokers, the risks of total, tobacco-related cancer, and CVD mortality increased with increasing cigarette consumption (Ptrend<0.05 for all). Compared with never smokers, former smokers who quit <5 and ≥5 years before baseline had HRs (95% CIs) for total mortality of 1.80 (1.00–3.25) and 1.02 (0.57–1.82), respectively. Conclusions: In this cohort of workers, cigarette smoking was associated with increased risk of death from all and specific causes (including CVD and tobacco-related cancer), although these risks diminished 5 years after smoking cessation.

著者

Keisuke Kuwahara Toru Honda Tohru Nakagawa Shuichiro Yamamoto Takeshi Hayashi Tetsuya Mizoue

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.28, no.2, pp.94-98, 2018-02-05 (Released:2018-02-05)

参考文献数

24

被引用文献数

6 11

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Background: Data on the effect of physical activity intensity on depression is scarce. We investigated the prospective association between intensity of leisure-time exercise and risk of depressive symptoms among Japanese workers.Methods: The participants were 29,052 employees (24,653 men and 4,399 women) aged 20 to 64 years without psychiatric disease including depressive symptoms at health checkup in 2006–2007 and were followed up until 2014–2015. Details of leisure-time exercise were ascertained via a questionnaire. Depressive states were assessed using a 13-item questionnaire. Multivariable-adjusted hazard ratio of depressive symptoms was estimated using Cox regression analysis.Results: During a mean follow-up of 5.8 years with 168,203 person-years, 6,847 workers developed depressive symptoms. Compared with workers who engaged in no exercise during leisure-time (0 MET-hours per week), hazard ratios (95% confidence intervals) associated with >0 to <7.5, 7.5 to <15.0, and ≥15.0 MET-hours of leisure-time exercise were 0.88 (0.82–0.94), 0.85 (0.76–0.94), and 0.78 (0.68–0.88) among workers who engaged in moderate-intensity exercise alone; 0.93 (0.82–1.06), 0.82 (0.68–0.98), and 0.83 (0.71–0.98) among workers who engaged in vigorous-intensity exercise alone; and 0.96 (0.80–1.15), 0.80 (0.67–0.95), and 0.76 (0.66–0.87) among workers who engaged in both moderate- and vigorous-intensity exercise with adjustment for age, sex, lifestyles, work-related and socioeconomic factors, and body mass index. Additional adjustment for baseline depression score attenuated the inverse association, especially among those who engaged in moderate-intensity exercise alone.Conclusions: The results suggest that vigorous-intensity exercise alone or vigorous-intensity combined with moderate-intensity exercise would prevent depressive symptoms among Japanese workers.

著者

Keiji Nakamura Satoshi Ide Sho Saito Noriko Kinoshita Satoshi Kutsuna Yuki Moriyama Tetsuya Suzuki Masayuki Ota Hidetoshi Nomoto Tetsuya Mizoue Masayuki Hojo Jin Takasaki Yusuke Asai Mari Terada Yutaro Akiyama Yusuke Miyazato Takato Nakamoto Yuji Wakimoto Mugen Ujiie Kei Yamamoto Masahiro Ishikane Shinichiro Morioka Kayoko Hayakawa Haruhito Sugiyama Norio Ohmagari

出版者

National Center for Global Health and Medicine

雑誌

Global Health & Medicine (ISSN:24349186)

巻号頁・発行日

vol.2, no.3, pp.174-177, 2020-06-30 (Released:2020-07-04)

参考文献数

8

被引用文献数

7

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Since the initial report of coronavirus disease (COVID-19) from the City of Wuhan, China in December 2019, there have been multiple cases globally. Reported here are 11 cases of COVID-19 at this hospital; all of the patients in question presented with relative bradycardia. The severity of the disease was classified into four grades. Of the patients studied, 3 with mild COVID-19 and 3 with moderate COVID-19 improved spontaneously. Lopinavir/ritonavir was administered to 3 patients with severe COVID-19 and 2 with critical COVID-19. Both patients with critical COVID-19 required mechanical ventilation and extracorporeal membrane oxygenation. Both patients with critical COVID-19 had a higher fever that persisted for longer than patients with milder COVID-19. The respiratory status of patients with critical COVID-19 worsened rapidly 7 days after the onset of symptoms. Relative bradycardia may be useful in distinguishing between COVID-19 and bacterial community-acquired pneumonia. In patients who have had a fever for > 7 days, the condition might worsen suddenly.

著者

Keisuke Kuwahara Teppei Imai Toshiaki Miyamoto Takeshi Kochi Masafumi Eguchi Akiko Nishihara Tohru Nakagawa Shuichiro Yamamoto Toru Honda Isamu Kabe Tetsuya Mizoue Seitaro Dohi

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20170024, (Released:2018-02-03)

参考文献数

15

被引用文献数

6

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Background: Evidence linking working hours and the risk of type 2 diabetes mellitus (T2DM) is limited and inconsistent in Asian populations. No study has addressed the combined association of long working hours and sleep deprivation on T2DM risk. We investigated the association of baseline overtime work with T2DM risk and assessed whether sleep duration modified the effect among Japanese.Methods: Participants were Japanese employees (28,489 men and 4,561 women) aged 30–64 years who reported overtime hours and had no history of diabetes at baseline (mostly in 2008). They were followed up until March 2014. New-onset T2DM was identified using subsequent checkup data, including measurement of fasting/random plasma glucose, glycated hemoglobin, and self-report of medical treatment. Hazard ratios (HRs) of T2DM were estimated using Cox regression analysis. The combined association of sleep duration and working hours was examined in a subgroup of workers (n = 27,590).Results: During a mean follow-up period of 4.5 years, 1,975 adults developed T2DM. Overtime work was not materially associated with T2DM risk. In subgroup analysis, however, long working hours combined with insufficient sleep were associated with a significantly higher risk of T2DM (HR 1.42; 95% CI, 1.11–1.83), whereas long working hours with sufficient sleep were not (HR 0.99; 95% CI, 0.88–1.11) compared with the reference (<45 hours of overtime with sufficient sleep).Conclusions: Sleep duration modified the association of overtime work with the risk of developing T2DM. Further investigations to elucidate the long-term effect of long working hours on glucose metabolism are warranted.

著者

Yusuke Kabeya Atsushi Goto Masayuki Kato Yumi Matsushita Yoshihiko Takahashi Akihiro Isogawa Manami Inoue Tetsuya Mizoue Shoichiro Tsugane Takashi Kadowaki Mitsuhiko Noda

出版者

日本疫学会

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20150059, (Released:2015-12-26)

参考文献数

32

被引用文献数

7

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Background: The association between time spent walking and risk of diabetes was investigated in a Japanese population-based cohort.Methods: Data from the Japan Public Health Center-based Prospective Diabetes cohort were analyzed. The surveys of diabetes were performed at baseline and at the 5-year follow-up. Time spent walking per day was assessed using a self-reported questionnaire (<30 minutes, 30 minutes to <1 hour, 1 to <2 hours, or ≥2 hours). A cross-sectional analysis was performed among 26 488 adults in the baseline survey. Logistic regression was used to examine the association between time spent walking and the presence of unrecognized diabetes. We then performed a longitudinal analysis that was restricted to 11 101 non-diabetic adults who participated in both the baseline and 5-year surveys. The association between time spent walking and the incidence of diabetes during the 5 years was examined.Results: In the cross-sectional analysis, 1058 participants had unrecognized diabetes. Those with time spent walking of <30 minutes per day had increased odds of having diabetes in relation to those with time spent walking of ≥2 hours (adjusted odds ratio [OR] 1.23; 95% CI, 1.02–1.48). In the longitudinal analysis, 612 participants developed diabetes during the 5 years of follow-up. However, a significant association between time spent walking and the incidence of diabetes was not observed.Conclusions: Increased risk of diabetes was implied in those with time spent walking of <30 minutes per day, although the longitudinal analysis failed to show a significant result.

著者

Teppei Imai Keisuke Kuwahara Isamu Kabe Yohei Kawasaki Tetsuya Mizoue Seitaro Dohi for the Japan Epidemiology Collaboration on Occupational Health Study Group

出版者

Japan Society for Occupational Health

雑誌

Environmental and Occupational Health Practice (ISSN:24344931)

巻号頁・発行日

vol.2, no.1, pp.2020-0012-CM, 2020 (Released:2020-12-25)

参考文献数

10

著者

Rachana Manandhar Shrestha Tetsuya Mizoue Zobida Islam Yukino Kawakatsu Hidemi Ito Keiko Wada Chisato Nagata Ling Zha Tetsuhisa Kitamura Ritsu Sakata Takashi Kimura Yumi Sugawara Ichiro Tsuji Ren Sato Norie Sawada Shoichiro Tsugane Yingsong Lin Isao Oze Sarah Krull Abe Manami Inoue

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20220289, (Released:2023-02-25)

参考文献数

39

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Background: While tall stature has been linked to an increase in the risk of colorectal cancer (CRC), its association with cancer in the colorectum and its subsites remains unclear among Asians.Methods: We conducted a pooled analysis of ten population-based cohort studies among adults in Japan. Each study estimated hazard ratios (HRs) and 95% confidence intervals (CIs) for CRC incidence associated with adult height were estimated using Cox proportional hazards regression with adjustment of the same set of covariates were then pooled to estimate summary HRs incidence using random-effect models.Results: We identified 9,470 CRC incidences among 390,063 participants during 5,672,930 person-years of follow-up. Men and women with tall stature had a higher risk of CRC and colon cancer. HRs (95% CI) for CRC, colon cancer, and distal colon cancer (DCC) for the highest versus lowest height categories were 1.23 (1.07–1.40), 1.22 (1.09–1.36), and 1.27 (1.08–1.49), respectively, in men and 1.21 (1.09–1.35), 1.23 (1.08–1.40), and 1.35 (1.003–1.81), respectively, in women. The association with proximal colon cancer (PCC) and rectal cancer was less evident in both sexes.Conclusions: This pooled analysis confirms the link between tall stature and a higher risk of CRC and colon cancer (especially distal colon) among the Japanese and adds evidence to support the use of adult height to identify those at a higher risk of CRC.

著者

Eiko Saito Manami Inoue Norie Sawada Hadrien Charvat Taichi Shimazu Taiki Yamaji Motoki Iwasaki Shizuka Sasazuki Tetsuya Mizoue Hiroyasu Iso Shoichiro Tsugane

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.28, no.3, pp.140-148, 2018-03-05 (Released:2018-03-05)

参考文献数

46

被引用文献数

25 36

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Background: We examined the associations of alcohol consumption and liver holidays with all-cause mortality and with mortality due to cancer, heart disease, cerebrovascular disease, respiratory disease, and injury using a large-scale prospective study in Japan.Methods: We followed 102,849 Japanese who were aged between 40 and 69 years at baseline for 18.2 years on average, during which 15,203 deaths were reported. Associations between alcohol intake and mortality risk were assessed using a Cox proportional hazards model, with analysis by the number of liver holidays (in which a person abstains from drinking for several days a week).Results: A J-shaped association was observed between alcohol intake and total mortality in men (nondrinkers: reference; occasional drinkers: hazard ratio [HR] 0.74; 95% confidence interval [CI], 0.68–0.80; 1–149 g/week: HR 0.76; 95% CI, 0.71–0.81; 150–299 g/week: HR 0.75; 95% CI, 0.70–0.80; 300–449 g/week: HR 0.84; 95% CI, 0.78–0.91; 450–599 g/week: HR 0.92; 95% CI, 0.83–1.01; and ≥600 g/week: HR 1.19; 95% CI, 1.07–1.32) and in women (nondrinkers: reference; occasional: HR 0.75; 95% CI, 0.70–0.82; 1–149 g/week: HR 0.80; 95% CI, 0.73–0.88; 150–299 g/week: HR 0.91; 95% CI, 0.74–1.13; 300–449 g/week: HR 1.04; 95% CI, 0.73–1.48; and ≥450 g/week: HR 1.59; 95% CI, 1.07–2.38). In current drinkers, alcohol consumption was associated with a linear, positive increase in mortality risk from all causes, cancer, and cerebrovascular disease in both men and women, but not heart disease in men. Taking of liver holidays was associated with a lower risk of cancer and cerebrovascular disease mortality in men.Conclusions: Alcohol intake showed J-shaped associations with the risk of total mortality and three leading causes of death. However, heavy drinking increases the risk of mortality, which highlights the necessity of drinking in moderation coupled with liver holidays.

著者

Thomas Svensson Manami Inoue Eiko Saito Norie Sawada Hiroyasu Iso Tetsuya Mizoue Atsushi Goto Taiki Yamaji Taichi Shimazu Motoki Iwasaki Shoichiro Tsugane

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20190210, (Released:2020-02-01)

参考文献数

39

被引用文献数

1 9

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Background: Short and long sleep durations are associated with mortality outcomes. The association between sleep duration and mortality outcomes may differ according to sex and age.Methods: Participants of the Japan Public Health Center-based prospective study (JPHC Study) were aged 40–69 years and had completed a detailed questionnaire on lifestyle factors. Sex- and age-stratified analyses on the association between habitual sleep duration and mortality from all-causes, cardiovascular diseases (CVD), cancer and other causes included 46,152 men and 53,708 women without a history of CVD or cancer. Cox proportional hazards regression models, adjusted for potential confounders, were used to determine hazard ratios and 95% confidence intervals.Results: Mean follow-up time was 19.9 years for men and 21.0 years for women. In the multivariable sex-stratified models, some categories of sleep durations ≥8 hours were positively associated with mortality from all-causes, CVD, and other causes in men and women compared with 7 hours. The sex- and age-stratified analyses did not reveal any major differences in the association between sleep duration and mortality outcomes in groups younger and older than 50 years of age. The only exception was the significant interaction between sleep duration and age in women for mortality from other causes.Conclusions: Sleep durations ≥8 hours are associated with mortality outcomes in men and women. Age may be an effect modifier for the association between sleep duration and mortality from other causes in women.

著者

Dong V. Hoang Shamima Akter Yosuke Inoue Keisuke Kuwahara Ami Fukunaga Zobida Islam Tohru Nakagawa Toru Honda Shuichiro Yamamoto Hiroko Okazaki Toshiaki Miyamoto Takayuki Ogasawara Naoko Sasaki Akihiko Uehara Makoto Yamamoto Takeshi Kochi Masafumi Eguchi Taiki Shirasaka Makiko Shimizu Satsue Nagahama Ai Hori Teppei Imai Akiko Nishihara Kentaro Tomita Chihiro Nishiura Maki Konishi Isamu Kabe Kenya Yamamoto Tetsuya Mizoue Seitaro Dohi

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.33, no.6, pp.311-320, 2023-06-05 (Released:2023-06-05)

参考文献数

45

被引用文献数

3

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Background: Metabolic syndrome (MetS) has been associated with various chronic diseases that may lead to long-term sickness absence (LTSA), but there is lacking information on the direct association between MetS and LTSA. The present study aimed to investigate the all-cause and cause-specific associations between MetS and the risk of medically certified LTSA among Japanese workers.Methods: We recruited 67,403 workers (57,276 men and 10,127 women), aged 20–59 years from 13 companies in Japan during their health check-ups in 2011 (11 companies) and 2014 (2 companies), and we followed them for LTSA events (≥30 consecutive days) until March 31, 2020. MetS was defined according to the Joint Interim Statement. A Cox proportional hazards regression model was used to estimate hazard ratios (HRs) and its 95% confidence intervals (CIs) for LTSA associated with MetS and its components.Results: During 408,324 person-years of follow-up, 2,915 workers experienced LTSA. The adjusted HR for all-cause LTSA was 1.54 (95% CI, 1.41–1.68) among those with MetS compared to those without MetS. In cause-specific analysis, HRs associated with MetS significantly increased for LTSA due to overall physical disorders (1.76); cardiovascular diseases (3.16); diseases of the musculoskeletal system and connective tissue (2.01); cancers (1.24); obesity-related cancers (1.35); mental, behavioral, and neurodevelopmental disorders (1.28); reaction to severe stress and adjustment disorders (1.46); and external causes (1.46). The number of MetS components were also significantly associated with increased LTSA risk.Conclusion: MetS was associated with an increase in the risk of LTSA due to various diseases among Japanese workers.

著者

Hiroyuki Masaoka Keitaro Matsuo Isao Oze Takashi Kimura Akiko Tamakoshi Yumi Sugawara Ichiro Tsuji Norie Sawada Shoichiro Tsugane Hidemi Ito Keiko Wada Chisato Nagata Tetsuhisa Kitamura Ling Zha Ritsu Sakata Kotaro Ozasa Yingsong Lin Tetsuya Mizoue Keitaro Tanaka Sarah Krull Abe Manami Inoue

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20220085, (Released:2022-10-29)

参考文献数

29

被引用文献数

3

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Background: Although cigarette smoking is an established risk factor for bladder cancer, assessment of smoking impact on bladder cancer in Asian populations has been hindered by few cohort studies conducted in Asian populations. We therefore investigated the risk of bladder cancer associated with smoking status, cumulative smoking intensity and smoking cessation in Japan.Methods: We analyzed data for 157,295 men and 183,202 women in ten population-based cohort studies in Japan. The risk associated with smoking behaviors was estimated using Cox regression models within each study, and pooled hazard ratios (HR) and their 95% confidence intervals (CI) for the incidence of bladder cancer were calculated.Results: During 4,729,073 person-years of follow up, 936 men and 325 women developed bladder cancer. In men, former smokers (HR 1.47; 95% CI, 1.18-1.82) and current smokers (HR 1.96; 95% CI, 1.62-2.38) had higher risk than never smokers. In women, current smokers had higher risk than never smokers (HR 2.35; 95% CI, 1.67-3.32). HRs in men linearly increased with increasing pack-years. Risk decreased with increasing years of smoking cessation in men with a significant dose-response trend. Former smokers with a duration of more than 10 years after smoking cessation had no significantly increased risk compared with never smokers (HR 1.26; 95% CI, 0.97-1.63).Conclusions: Data from a pooled analysis of ten population-based cohort studies in Japan clearly show an association between cigarette smoking and bladder cancer risk. The risk of smokers may approximate that of never smokers following cessation for many years.

著者

Huan Hu Ami Fukunaga Toshitaka Yokoya Tohru Nakagawa Toru Honda Shuichiro Yamamoto Hiroko Okazaki Toshiaki Miyamoto Naoko Sasaki Takayuki Ogasawara Naoki Gonmori Kenya Yamamoto Ai Hori Kentaro Tomita Satsue Nagahama Maki Konishi Nobumi Katayama Hisayoshi Morioka Isamu Kabe Tetsuya Mizoue Seitaro Dohi for the Japan Epidemiology Collaboration on Occupational Health Study Group

出版者

Japan Atherosclerosis Society

雑誌

Journal of Atherosclerosis and Thrombosis (ISSN:13403478)

巻号頁・発行日

pp.63118, (Released:2021-10-23)

参考文献数

32

被引用文献数

5

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Aims: We aimed to investigate the association between non-high-density lipoprotein cholesterol (non-HDL-C) levels and the risk of cardiovascular disease (CVD) and its subtypes. Methods: In this contemporary cohort study, we analyzed the data of 63,814 Japanese employees aged ≥ 30 years, without known CVD in 2012 and who were followed up for up to 8 years. The non-HDL-C level was divided into 5 groups: <110, 110-129, 130-149, 150-169, and ≥ 170 mg/dL. The Cox proportional hazards model was used to calculate the hazard ratios (HRs) and the corresponding 95% confidence intervals (CIs) for CVD and its subtypes associated with each non-HDL-C group, considering 130-149 mg/dL as the reference group. Results: During the study period, 271 participants developed CVD, including 78 myocardial infarctions and 193 strokes (102 ischemic strokes, 89 hemorrhagic strokes, and 2 unknowns). A U-shaped association between non-HDL-C and stroke was observed. In the analysis of stroke subtypes, the multivariable-adjusted HR (95% CI) for hemorrhagic stroke was 2.61 (1.19–5.72), 2.02 (0.95–4.29), 2.10 (1.01–4.36), and 1.98 (0.96-4.08), while that for ischemic stroke was 1.54 (0.77-3.07), 0.91 (0.46-1.80), 0.73 (0.38-1.41), and 1.50 (0.87-2.56) in the <110, 110-129, 150-169, and ≥ 170 mg/dL groups, respectively. Individuals with elevated non-HDL-C levels had a higher risk of myocardial infarction. Conclusions: High non-HDL-C levels were associated with an increased risk of myocardial infarction. Moreover, high and low non-HDL-C levels were associated with a high risk of stroke and its subtypes among Japanese workers.

著者

Keisuke Kuwahara Ai Hori Norio Ohmagari Tetsuya Mizoue

出版者

National Center for Global Health and Medicine

雑誌

Global Health & Medicine (ISSN:24349186)

巻号頁・発行日

pp.2020.01041, (Released:2020-04-29)

参考文献数

30

被引用文献数

4

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The coronavirus disease 2019 (COVID-19) has spread rapidly across the globe, presenting severe challenges to societies. Gaining a better understanding of patient demographics is essential to develop measures to counteract such spreading. In this context, from a viewpoint of occupational health, we analyzed the publicly available data on patients diagnosed with COVID-19 in Tokyo, which reported the highest number of cases in Japan. A total of 243 cases aged 20 years or older (excluding students) were recorded between January 14 and March 27, 2020. Of 233 cases excluding 10 cases of the first cluster, 162 were men and 176 were of working age (20 to 69 years). Of 203 cases with valid information on employment status, 151 (74%) were workers: 114 employees, 31 self-employed, and 6 medical staff. Of the working patients, the majority were male: 72% in employed and 87% in self-employed. These data suggest the importance of occupational health in controlling the spread of COVID-19. In April 2020, a state of emergency was declared in response to a surge in the number of cases, especially in metropolitan areas. A working schedule associated with lower risks of infection, including telework and flexible working hours, should be rigorously promoted to minimize human-to-human contact. Such policies, along with the implementation of effective measures to protect essential workers from infection, overwork, and stigma, would ensure the smooth running of society amidst the present crisis.

著者

Shizuka Sasazuki Manami Inoue Ichiro Tsuji Yumi Sugawara Akiko Tamakoshi Keitaro Matsuo Kenji Wakai Chisato Nagata Keitaro Tanaka Tetsuya Mizoue Shoichiro Tsugane

出版者

日本疫学会

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.21, no.6, pp.417-430, 2011-11-05 (Released:2011-11-05)

参考文献数

50

被引用文献数

26 91 16

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Background: We pooled data from 7 ongoing cohorts in Japan involving 353 422 adults (162 092 men and 191 330 women) to quantify the effect of body mass index (BMI) on total and cause-specific (cancer, heart disease, and cerebrovascular disease) mortality and identify optimal BMI ranges for middle-aged and elderly Japanese.Methods: During a mean follow-up of 12.5 years, 41 260 deaths occurred. The Cox proportional hazards model was used to estimate hazard ratios (HRs) for each BMI category, after controlling for age, area of residence, smoking, drinking, history of hypertension, diabetes, and physical activity in each study. A random-effects model was used to obtain summary measures.Results: A reverse-J pattern was seen for all-cause and cancer mortality (elevated risk only for high BMI in women) and a U- or J-shaped association was seen for heart disease and cerebrovascular disease mortality. For total mortality, as compared with a BMI of 23 to 25, the HR was 1.78 for 14 to 19, 1.27 for 19 to 21, 1.11 for 21 to 23, and 1.36 for 30 to 40 in men, and 1.61 for 14 to 19, 1.17 for 19 to 21, 1.08 for 27 to 30, and 1.37 for 30 to 40 in women. High BMI (≥27) accounted for 0.9% and 1.5% of total mortality in men and women, respectively.Conclusions: The lowest risk of total mortality and mortality from major causes of disease was observed for a BMI of 21 to 27 kg/m2 in middle-aged and elderly Japanese.

著者

Takashi Shimizu Tetsuya Mizoue Shinya Kubota Norio Mishima Shoji Nagata

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.45, no.3, pp.185-190, 2003 (Released:2003-07-04)

参考文献数

32

被引用文献数

57

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We investigated the relationship between burnout and communication skill training among Japanese hospital nurses to improve the mental health of human service workers. The subjects were forty-five registered nurses referred to a self-expression skill intervention program by their section superiors, with each superior choosing from two to five nurses. The hospital was located in the Kyushu area and staffed by about four hundred nurses. The subjects were divided into an intervention group (19 nurses) and a reference group (26 nurses). The intervention group received the communication skill training in July and August, 2001. The communication skill training was carried out in accordance with the assertiveness training (AsT) precepts of Anne Dickson. In June, 2001, we delivered a set of questionnaires including age, gender, working years, a burnout scale, and a communication skill check-list as a baseline survey. The baseline questionnaires were returned at the end of June, 2001. In January, 2002, we delivered the same questionnaire again to the two groups and collected them at the end of the month. Excluding the only male and insufficient answers, twenty-six nurses (58%) returned complete answers in the initial and subsequent surveys. We found that the personal accomplishment and the two communication skills such as “accepting valid criticisms” and “negotiation” of the intervention group had improved significantly five months after the training as compared with that of the reference. Our results implied that communication skill training might have a favorable effect on burnout among Japanese hospital nurses.

著者

Hiroyuki Masaoka Keitaro Matsuo Isao Oze Takashi Kimura Akiko Tamakoshi Yumi Sugawara Ichiro Tsuji Norie Sawada Shoichiro Tsugane Hidemi Ito Keiko Wada Chisato Nagata Tetsuhisa Kitamura Ling Zha Ritsu Sakata Kotaro Ozasa Yingsong Lin Tetsuya Mizoue Keitaro Tanaka Sarah Krull Abe Manami Inoue

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.33, no.11, pp.582-588, 2023-11-05 (Released:2023-11-05)

参考文献数

29

被引用文献数

3

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Background: Although cigarette smoking is an established risk factor for bladder cancer, assessment of smoking impact on bladder cancer in Asian populations has been hindered by few cohort studies conducted in Asian populations. Therefore, we investigated the risk of bladder cancer associated with smoking status, cumulative smoking intensity, and smoking cessation in Japan.Methods: We analyzed data for 157,295 men and 183,202 women in 10 population-based cohort studies in Japan. The risk associated with smoking behaviors was estimated using Cox regression models within each study, and pooled hazard ratios (HRs) and their 95% confidence intervals (CIs) for the incidence of bladder cancer were calculated.Results: During 4,729,073 person-years of follow-up, 936 men and 325 women developed bladder cancer. In men, former smokers (HR 1.47; 95% CI, 1.18–1.82) and current smokers (HR 1.96; 95% CI, 1.62–2.38) had higher risk than never smokers. In women, current smokers had higher risk than never smokers (HR 2.35; 95% CI, 1.67–3.32). HRs in men linearly increased with increasing pack-years. Risk decreased with increasing years of smoking cessation in men, with a significant dose-response trend. Former smokers with a duration of more than 10 years after smoking cessation had no significantly increased risk compared with never smokers (HR 1.26; 95% CI, 0.97–1.63).Conclusion: Data from a pooled analysis of 10 population-based cohort studies in Japan clearly show an association between cigarette smoking and bladder cancer risk. The risk of smokers may approximate that of never smokers following cessation for many years.

著者

Juan Xu Atsushi Goto Maki Konishi Masayuki Kato Tetsuya Mizoue Yasuo Terauchi Shoichiro Tsugane Norie Sawada Mitsuhiko Noda

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20220329, (Released:2023-05-20)

参考文献数

45

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Background: This study aimed to develop models to predict the 5-year incidence of T2DM in a Japanese population and validate them externally in an independent Japanese population.Methods: Data from 10,986 participants (aged 46–75 years) in the development cohort of the Japan Public Health Center-based Prospective Diabetes Study and 11,345 participants (aged 46–75 years) in the validation cohort of the Japan Epidemiology Collaboration on Occupational Health Study were used to develop and validate the risk scores in logistic regression models.Results: We considered non-invasive (sex, body mass index, family history of diabetes mellitus, and diastolic blood pressure) and invasive (glycated hemoglobin [HbA1c] and fasting plasma glucose [FPG]) predictors to predict the 5-year probability of incident diabetes. The area under the receiver operating characteristic curve was 0.643 for the non-invasive risk model, 0.786 for the invasive risk model with HbA1c but not FPG, and 0.845 for the invasive risk model with HbA1c and FPG. The optimism for the performance of all models was small by internal validation. In the internal-external cross-validation, these models tended to show similar discriminative ability across different areas. The discriminative ability of each model was confirmed using external validation datasets. The invasive risk model with only HbA1c was well-calibrated in the validation cohort.Conclusions: Our invasive risk models are expected to discriminate between high- and low-risk individuals with T2DM in a Japanese population.

著者

Ami Fukunaga Yosuke Inoue Tohru Nakagawa Toru Honda Shuichiro Yamamoto Hiroko Okazaki Makoto Yamamoto Toshiaki Miyamoto Takeshi Kochi Masafumi Eguchi Naoki Gommori Kenya Yamamoto Ai Hori Maki Konishi Nobumi Katayama Isamu Kabe Seitaro Dohi Tetsuya Mizoue

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20220245, (Released:2023-03-11)

参考文献数

23

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Background: Diabetes and prediabetes have been linked with morbidity or mortality from cardiovascular disease, cancer, or other physical disorders among working-age populations, but less is known about outcomes directly related to labor loss (e.g., long-term sickness absence (LTSA) or pre-retirement death due to physical disorders).This prospective study aimed to examine the association of diabetes and prediabetes with the risk of a composite outcome of LTSA and pre-retirement death due to physical disorders. The present study also examined the associations of severe outcomes (LTSA or death) due to specific physical disorders or injuries/external causes in relation to diabetes and prediabetes.Methods: Data were derived from the Japan Epidemiology Collaboration on Occupational Health study. A total of 60,519 workers from 12 companies were followed for eight years. Diabetes and prediabetes were defined based on the American Diabetes Association criteria. A Cox proportional hazards regression model was used to examine the association between diabetes/prediabetes and severe outcomes due to physical disorders or injuries/external causes.Results: The adjusted hazard ratios (95% confidence intervals) of severe outcomes due to all physical disorders were 1.22 (1.02–1.45) and 2.32 (2.04–2.64) for prediabetes and diabetes, respectively. In cause-specific analyses, an increased risk was observed for severe outcomes due to cancers, cardiovascular diseases, diseases of the musculoskeletal system, and injuries/external causes in relation to either or both diabetes and prediabetes.Conclusions: Diabetes and prediabetes were associated with an increased risk of severe outcomes due to physical disorders or injuries/external causes among Japanese workers.

著者

Chihiro Nishiura Yosuke Inoue Ikuko Kashino Akiko Nanri Motoki Endo Masafumi Eguchi Takeshi Kochi Noritada Kato Makiko Shimizu Teppei Imai Akiko Nishihara Makoto Yamamoto Hiroko Okazaki Kentaro Tomita Toshiaki Miyamoto Shuichiro Yamamoto Tohru Nakagawa Toru Honda Takayuki Ogasawara Naoko Sasaki Ai Hori Isamu Kabe Tetsuya Mizoue Seitaro Dohi

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.32, no.9, pp.431-437, 2022-09-05 (Released:2022-09-05)

参考文献数

23

被引用文献数

1 1

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Background: While it is essential to understand how long is sufficient for return-to-work when designing paid sick-leave systems, little attempt has been done to collect cause-specific information on when and how many of sickness absentees returned to work, became unemployed, or passed away.Methods: We studied the first sick-leave episode of ≥30 consecutive days in those ≤55 years of age during 2012–2013 among employees of 11 Japanese private companies (n = 1,209), which were followed until 2017. Overall and disease-specific cumulative incidences of return-to-work, resignations, and deaths were estimated using competing risk analysis.Results: During the 3.5-year period (follow-up rate: 99.9%), 1,014 returned to work, 167 became unemployed, and 27 died. Overall, return-to-work occurred within 1 year in 74.9% of all absentees and in 89.3% of those who successfully returned to work. Resignation occurred within 1 year in 8.7% of all absentees and in 62.9% of all subjects who resigned. According to ICD-10 chapters, the cumulative incidence of return-to-work ranged from 82.1% for mental disorders (F00–F99) to 95.3% for circulatory diseases (I00–I99). The cumulative incidence of return-to-work due to mental disorders ranged from 66.7% in schizophrenia (F20) to 95.8% in bipolar affective disorders (F31). Death was rarely observed except for cases of neoplasms (C00–D48), of which the cumulative incidence of death reached 14.2% by 1.5 years.Conclusion: Return-to-work and resignations occurred commonly within 1 year of sick leave among long-term sickness absentees in the Japanese private companies. Our findings may assist occupational physicians and employers in developing effective social protection schemes.

著者

Yosuke Inoue Shuichiro Yamamoto Andrew Stickley Keisuke Kuwahara Toshiaki Miyamoto Tohru Nakagawa Toru Honda Teppei Imai Akiko Nishihara Isamu Kabe Tetsuya Mizoue Seitaro Dohi

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.32, no.6, pp.283-289, 2022-06-05 (Released:2022-06-05)

参考文献数

45

被引用文献数

3 5

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Background: Although previous research has focused on the association between long working hours and several mental health outcomes, little is known about the association in relation to mental health-related sickness absence, which is a measure of productive loss. We aimed to investigate the association between overtime work and the incidence of long-term sickness absence (LTSA) due to mental disorders.Methods: Data came from the Japan Epidemiology Collaboration on Occupational Health Study (J-ECOH). A total of 47,422 subjects were followed-up in the period between April 2012 and March 2017. Information on LTSA was obtained via a study-specific registry. Baseline information was obtained at an annual health checkup in 2011; overtime working hours were categorized into <45; 45–79; 80–99; and ≥100 hours/month.Results: During a total follow-up period of 211,443 person-years, 536 people took LTSA due to mental disorders. A Cox proportional hazards model showed that compared to those with less than 45 hours/month of overtime work, those with 45–79 hours/month were at a lower risk of LTSA due to mental health problems (hazard ratio [HR] 0.63; 95% confidence interval [CI], 0.56–0.71) while those with overtime work of ≥100 hours/month had a 2.11 (95% CI, 1.12–3.98) times higher risk of LTSA due to mental health problems.Conclusion: Engaging in excessive overtime work was linked with a higher risk of LTSA due to mental health problems while the lower risk observed among individuals working 45–79 hours/month of overtime work might have been due to a healthy worker effect.