著者

Kanami Tsuno Norito Kawakami Akihito Shimazu Kyoko Shimada Akiomi Inoue Michael P. Leiter

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.59, no.3, pp.237-246, 2017-05-20 (Released:2017-05-25)

参考文献数

33

被引用文献数

25

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Objectives: Although incivility is a common interpersonal mistreatment and associated with poor mental health, there are few studies about it in Asian countries. The aim of this study was to develop the Japanese version of the modified Work Incivility Scale (J-MWIS), investigate its reliability and validity, and reveal the prevalence of incivility among Japanese employees in comparison with data on Canadian employees. Methods: A total of 2,191 Japanese and 1,071 Canadian employees were surveyed, using either the J-MWIS or MWIS. Japanese employees additionally answered questions on civility, worksite social support, workplace bullying, psychological distress, intention to leave, and work engagement to investigate construct validity. Results: At least one form of workplace incivility was experienced by both Japanese (52.3%) and Canadian (86.0%) employees in the previous month. Internal consistency reliability of the J-MWIS was acceptable (α=0.71-0.81), and correlation analyses also confirmed its construct validity as expected. Workplace incivility was associated with lower workgroup civility, lower supervisor and coworker support, higher workplace bullying, higher psychological distress, higher intention to leave, and lower work engagement. Confirmatory factor analyses showed that the original three-factor model (supervisor incivility, coworker incivility, and instigated incivility) fitted moderately in both Japan and Canada data, though the privacy/overfamiliarity factor was additionally extracted from exploratory factor analysis for the J-MWIS. Conclusions: The results of this study suggested that the J-MWIS has moderate internal consistency reliability and good construct validity.

著者

Hiroko Tobari Kazumasa Yamagishi Hiroyuki Noda Takeshi Tanigawa Hiroyasu Iso

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.51, no.4, pp.323-331, 2009 (Released:2009-08-12)

参考文献数

38

被引用文献数

3

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Objectives: Prevention of horse-related injuries is considered difficult because horse behavior is unpredictable. Therefore, risk factors for injuries related to professional horse racing need to be investigated. We conducted a study to determine whether body mass index (BMI) and γ-glutamyltransferase (GGT) levels are associated with professional horse racing-related injuries. Methods: A baseline healthy survey of 546 male grooms and exercise riders aged 40-70 yr working at Miho Training Center, the largest racing-horse training facility in Japan, was performed in May 2003. A total of 93 occupational injuries occurred from June 1, 2003 to December 31, 2005. The Cox proportional hazards model was used to examine associations between the risk of injury and BMI and GGT. Results: Grooms and exercise riders with BMI <20 kg/m2 or with BMI ≥25 kg/m2 compared to BMI=20.0-22.9 kg/m2 had 2.5 to 3.5-fold higher age-adjusted risks of injuries. The multivariate hazard ratios (95% confidence interval) after adjustment for age, GGT, smoking habit, and history of injuries were 3.5 (1.5 to 8.4) and 2.4 (1.2 to 4.8) for grooms, 3.1 (1.2 to 8.2) and 1.9 (0.4 to 10.1) for exercise riders, respectively. The age-adjusted hazard ratio of injuries for persons with GGT ≥100 IU/l was 2.0 to 2.5-fold higher than for those with GGT <60 IU/l. The multivariate hazard ratios were 1.9 (1.0 to 3.6) for grooms and 2.5 (1.0 to 6.2) for exercise riders. Conclusions: Low and high BMI and high GGT were associated with professional horse racing-related injuries.

著者

Koh Hiraoka Seiichiro Tateishi Koji Mori

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.57, no.6, pp.497-512, 2015 (Released:2015-12-25)

参考文献数

39

被引用文献数

21

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Objectives: The aim of this review was to summarize the lessons learned from the experience in protecting the health of workers engaged in operations following the accident at the Fukushima Daiichi Nuclear Power Plant (NPP). Methods: We reviewed all types of scientific papers examining workers' health found in Medline and Web of Sciences as well as some official reports published by the Ministry of Health, Labour and Welfare of Japan and other governmental institutes. Results: The papers and reports were classified into those investigating workers at the Fukushima Daiichi and Daini NPPs, workers engaged in decontamination operations in designated areas, and other workers. Regarding workers at the NPPs, many efforts were made to establish an emergency-care and occupational health system. Risk management efforts were undertaken for radiation exposure, heat stress, psychological stress, outbreak of infectious diseases, and fitness for work. Only a few reports dealt with decontamination workers and others; however, the health management of these workers was clearly weaker than that for workers at the NPPs. Conclusions: Many lessons can be learned from what occurred. That knowledge can be applied to ongoing decommissioning work and to future disasters. In addition, it is necessary to study the long-term health effects of radiation exposure and to accumulate data about the health of workers engaged in decontamination work and other areas.(J Occup Health 2015; 57: 497–512)

著者

Shanika Nanayakkara STMLD Senevirathna Tilak Abeysekera Rohana Chandrajith Neelakanthi Ratnatunga EDL Gunarathne Junxia Yan Toshiaki Hitomi Eri Muso Toshiyuki Komiya Kouji H. Harada Wanyang Liu Hatasu Kobayashi Hiroko Okuda Hideyuki Sawatari Fumihiko Matsuda Ryo Yamada Takao Watanabe Hideki Miyataka Seiichiro Himeno Akio Koizumi

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.13-0172-OA, (Released:2013-12-18)

被引用文献数

91

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Objectives: Previous investigations on chronic kidney disease of unknown etiology characterized by tubulointerstitial damages (CKDu) in the North Central Region (NCR) of Sri Lanka have supported the involvement of social, environmental and genetic factors in its pathogenesis. Methods: We conducted a social-environmental-and-genetic epidemiology study on a male population in NCR to investigate the genetic and environmental contributors. We recruited 311 case-series patients and 504 control candidates. Of the 504 control candidates, 218 (43%) were eliminated because of the presence of hypertension, proteinuria, high HBA1c, high serum creatinine or high alpha-1 microglobulin in urine. Results and Discussion: None of 18 metals measured (µg/l) in urine, including Cd, As and Pb, showed significantly higher concentrations in cases compared with controls. As speciation results showed that 75-80% of total urinary As was in the form of arsenobetaine, which is non-toxic to humans. None of the metal concentrations in drinking water samples exceeded guideline values. A genome-wide association study (GWAS) was conducted to determine the genetic contributors. The GWAS yielded a genome-wide significant association with CKDu for a single nucleotide polymorphism (SNP; rs6066043; P=5.23×10-9 in quantitative trait locus analysis; P=3.73×10-8 in dichotomous analysis) in SLC13A3 (sodium-dependent dicarboxylate transporter member 3). The population attributable fraction and odds ratio for this SNP were 50% and 2.13. Genetic susceptibility was identified as the major risk factor for CKDu. However, 43% of the apparently healthy male population suffers from non-communicable diseases, suggesting their possible influence on CKDu progression.

著者

Ben Ouyang Lucy DX Li Joanne Mount Alainna J Jamal Lauren Berry Carmine Simone Marcus Law RW Melissa Tai

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.59, no.1, pp.63-73, 2017-01-20 (Released:2017-01-24)

参考文献数

21

被引用文献数

21

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Objectives: This field study aimed to determine the incidence and distribution of needlestick injuries among medical trainees at a community teaching hospital in Toronto, Canada. Methods: The study was performed during the 2013-2015 academic years at Toronto East General Hospital (TEGH), a University of Toronto-affiliated community-teaching hospital during the 2013-2015 academic years. Eight-hundred and forty trainees, including medical students, residents, and post-graduate fellows, were identified and invited via email to participate in an anonymous online fluidsurveys.com survey of 16 qualitative and quantitative questions. Results: Three-hundred and fifty trainees responded (42% response rate). Eighty-eight (25%) respondents reported experiencing at least one injury at TEGH. In total, our survey identified 195 total injuries. Surgical trainees were significantly more likely to incur injuries than non-surgical trainees (IRR = 3.03, 95% CI 1.80-5.10). Orthopaedic surgery trainees had the highest risk of a needlestick injury, being over 12 times more likely to be injured than emergency medicine trainees (IRR = 12.4, 95% CI 2.11-72.32). Only 28 of the 88 most recent needlestick injuries were reported to occupational health. Trainees reported a perception of insignificant risk, lack of resources and support for reporting, and injury stigmatization as reasons for not reporting needlestick injuries. Conclusions: Needlestick injuries were a common underreported risk to medical trainees at TEGH. Future research should investigate strategies to reduce injury and improve reporting among the high-risk and reporting-averse trainees.

著者

Orawan Kaewboonchoo Paul Ratanasiripong

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.57, no.4, pp.371-377, 2015 (Released:2015-10-31)

参考文献数

17

被引用文献数

2 14

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Objective: The purpose of this research was to develop and test the psychometric properties of the Thai version of the Work Ability Index (WAI). Methods: Forward translation and back-translation of the WAI were performed by seven bilingual professionals to ensure that the Thai WAI was culturally relevant and conceptually accurate. To ensure generalizability of the Thai WAI, a sample of 2,744 Thai workers from 19 different enterprises in five regions of Thailand completed the Thai version of the WAI along with the General Health Questionnaire. The 19 enterprises were from the following industries: canned food, snack food, cooking oil, footwear, pharmaceutical, ceramics, toy, steel, petrochemical, and auto parts. Results: The results from exploratory factor analysis supported a 3-factor model, accounting for 53.49% of the total variance. The results also provided evidence for adequate test-retest reliability and internal consistency of the Thai WAI. The internal consistency of the Thai WAI was found to be slightly low due to the newness of the concept of work ability, which is not a common term used in the Thai language; therefore, explanation of the meaning of work ability is needed to increase understanding of workers. Conclusions: By providing early recognition of workers' health risks as well as risks of early termination, the WAI can help Thai human resources managers respond better to the needs of workers and be proactive in their efforts to retain workers in their organizations. Occupational health professionals could also utilize the WAI to evaluate the work ability of Thai workers in order to help organizations recognize early signs of their workers' health risks and possible early terminations and respond appropriately.(J Occup Health 2015; 57: 371–377)

著者

Kazuya Adachi Tomotaro Dote Emi Dote Go Mitsui Koichi Kono

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.49, no.3, pp.235-241, 2007 (Released:2007-06-13)

参考文献数

18

被引用文献数

14 17

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Cadmium fluoride (CdF) is commonly used as an insulator for ulta high speed mass telecommunications equipment, and there is a considerable risk that industrial workers will inhale CdF particles. Despite the possibility that acute exposure can cause harmful systemic effects, there are no studies to date that address the health consequences of acute CdF exposure. This study therefore aimed to determine the acute lethal dose of CdF and its effects on various target organs, including the liver and kidney. We also determined the effect of CdF on serum electrolytes and acid-base balance. The effective lethal dose was determined and dose-response study was conducted after intravenous administration of CdF in rats. The 24 h LD50 of CdF was determined to be 3.29 mg/kg. The dose-response study used doses of 1.34, 2.67, 4.01 mg/kg CdF. Saline or sodium fluoride solution were used for controles. Severe hepatocellular injury was induced at doses greater than 2.67 mg/kg, as demonstrated by AST and ALT activities greater than 1,500 IU/l in rats injected with a dose of 4.01 mg/kg. Acute renal failure was induced at doses greater than 2.67 mg/kg. Decreased serum Ca, increased serum K and metabolic acidosis were induced at a dose of 4.01 mg/kg. Decreased serum Ca was caused by exposure to ionized F. CdF has the strongest lethal and hepatic toxicity among all Cd containing compounds.

著者

Miwa Yamaguchi Masafumi Eguchi Shamima Akter Takeshi Kochi Huanhuan Hu Ikuko Kashino Keisuke Kuwahara Isamu Kabe Tetsuya Mizoue

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.2017-0298-OA, (Released:2018-09-27)

被引用文献数

4

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Objective: To investigate associations of work-related stressors and their changes over time with the risk of developing metabolic syndrome (MetS) among Japanese manufacturing workers.Methods: Participants were 1,040 employees aged 19 to 68 years who were free from MetS at baseline and completed the three year-interval follow-up survey. MetS was defined according to the Joint Interim Statement. Work-related stressors (job strain, job demands, job control, and worksite social support) were assessed based on the Job Content Questionnaire and were split into two categories (low and high) by the median value at each survey. Multivariable logistic regression was performed to investigate the associations of baseline work-related stressors and their changes over time with the incidence of MetS.Results: Three years later, 61 workers developed MetS. Higher job demands at baseline were significantly associated with a lower risk of MetS (adjusted odds ratio 0.46, 95% confidential interval: 0.24, 0.89). In the analyses of the changes in stressors over time, those whose job demands changed from low to high showed significantly higher risk of MetS (adjusted odds ratio 3.27, 95% confidential interval: 1.46, 7.34), compared with those who reported low job demands in both surveys.Conclusions: Results suggest that an increase in job demands over time, but not higher job demands at baseline, is associated with increased risk of MetS.

著者

Suguru Okubo Kazuhito Yokoyama Mayo Suzuki Iori Tani Wakaha Ikeda Fumihiko Kitamura

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.54, no.1, pp.51-55, 2012 (Released:2012-03-05)

参考文献数

20

被引用文献数

1

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Objectives: The aim of this study was to elucidate the factors affecting the difficulties in receiving a medical consultation among workers with mental health problems. Methods: The present study was performed using a cross-sectional survey. We requested occupational physicians and nurses who were members of the Japan Society for Occupational Health to distribute self-administered questionnaires to their clients. Results: Ninety-nine workers (68 males and 30 females), aged 40.6 ± 9.1 yr, returned completed questionnaires; 65% of the respondents had been diagnosed with depression. The most common difficulty perceived by them was that there were no intra-office counselors. Multiple regression analysis revealed that the number of months between the onset of mental health problems and the first medical consultation was significantly associated with age and having no sick leave allowance. Conclusions: The implementation and enhancement of sick leave allowance may promote early intervention in regard to workplace mental health problems. Mental health education and regular checkups for older workers is also critical for early detection and intervention of mental health problems.

著者

Nagano Kasuke Umeda Yumi Saito Misae NISHIZAWA Tomoshi IKAWA Naoki ARITO Heihachiro YAMAMOTO Seigo FUKUSHIMA Shoji

出版者

公益社団法人日本産業衛生学会

雑誌

Journal of occupational health (ISSN:13419145)

巻号頁・発行日

vol.49, no.4, pp.249-259, 2007-07-01

参考文献数

44

被引用文献数

3

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Subchronic toxicity of carbon tetrachloride (CCl_4) was examined by inhalation exposure of F344 rats and BDF_1 mice of both sexes to 0, 10, 30, 90, 270 or 810 ppm (v/v) CCl_4 vapor for 13 wk (6 h/d and 5 d/wk). In the high exposure levels at 270 and 810 ppm, altered cell foci in the livers of both rats and mice, and fibrosis and cirrhosis in the rat liver were observed. Hematoxylin and eosin-stained altered cell foci of rats were recognized as glutathione-S-transferase placental form (GST-P) positive foci, which are preneoplactic lesions of hepatocarcinogenesis. The most sensitive endpoint of CCl_4-induced toxicity was fatty change with large droplets in rats of both sexes and male mice, and cytoplasmic globules in male mice, as well as increased relative liver weight in male rats. Those endpoints were manifested at 10 ppm and the LOAEL was determined as 10 ppn for the hepatic endpoints in rats and mice. Enhanced cytolytic release of liver transaminases into plasma in rats and mice and its close association with hepatic collapse in mice were observed at medium and high levels of inhalation exposure. Both CCl_4-induced hematotoxicity and nephrotoxicity were observed in both rats and mice, but those toxicities were manifested at higher exposure concentrations than hepatotoxicity. The LOAEL for the hepatic endpoint and the GST-P-stained altered cell foci provide relevant animal data for reconsidering the occupational exposure limit value of 5 ppm for CCl_4 and strengthen the evidence of CCl_4-induced hepatocarcinogenicity which is used in its carcinogenicity classification.

著者

DAS Banibrata GHOSH Tirthankar GANGOPADHYAY Somnath

出版者

公益社団法人 日本産業衛生学会

雑誌

Journal of occupational health (ISSN:13419145)

巻号頁・発行日

vol.55, no.4, pp.244-258, 2013-07-01

参考文献数

41

被引用文献数

33

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<b>Objective:</b> Children are universally considered to be the most important asset for any nation. The main aims of the present study were 1) to investigate the causation of discomfort related to working postures 2) to assess the physiological strain among the child farmers and 3) to assess the thermal stress during work in an agricultural field. <b>Methods:</b> For this study, 120 child agricultural workers and 120 control subjects aged 10-16 years were selected randomly, and a detailed posture analysis was performed among them by REBA and OWAS methods. The Modified Nordic Questionnaire was applied to assess the discomfort felt among both groups of workers. Physiological assessment of workload was carried out by recording the heart rate and blood pressure of the workers prior to work and just after work in the field. <b>Results:</b> Child agricultural workers suffered from pain especially in the low back (98%), knees (88%), hands (82%), shoulder (77%) and neck (68%). Among the agricultural activities in potato cultivation, the child potato workers, felt discomfort during spading (99%), sprinkling water (90%) and picking crops (87%). The post-activity heart rate of the child agricultural workers was 170.1 beats/min, whereas the systolic and diastolic blood pressures were 129.0 and 67.0 mm/Hg respectively. <b>Conclusions:</b> Most of the agricultural activities in potato cultivation were strenuous ones that affect the children, who suffered from acute pain and discomfort for a long period of time, which mainly hampers and restricts their education.(J Occup Health 2013; 55: 244-258)

著者

Makiko Nakano Kazuyuki Omae Toru Takebayashi Shigeru Tanaka and Shigeki Koda

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.2017-0220-OA, (Released:2018-05-09)

被引用文献数

22

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Background: ortho-Toluidine (OT) was listed as a Group 1 carcinogen by the International Agency for Research on Cancer in 2012 based on epidemiological observations of workers co-exposed to OT and aromatic amines. From 2014 to 2017, several cases of bladder cancer (BCa) secondary to occupational exposure, primarily to OT, were detected in Japan.Objective: To describe 10 cases of BCa in male Japanese workers exposed primarily to OT at two plants that produce organic dye and pigment intermediates.Methods: Details of the 10 cases were obtained from company records and through a questionnaire and interview. The surrogate level of exposure to each aromatic amine was calculated as the total job-weight/month for each process for each job-year.Results: No quantitative exposure data were available. In most cases the surrogate level of exposure to OT was higher than to other amines. All 10 cases were exposed primarily to OT and co-exposed to para-toluidine, ortho-anisidine, aniline, 2,4-xylidine or ortho-chloroaniline. The age range at diagnosis was 41–71 years (mean 56). The duration of OT exposure was 7–28 years (mean 16.5). Disease latency was 16–28 years (mean 21.9). Eight patients were smokers. The main symptom at diagnosis was hematuria (70%).Conclusions: The characteristics of BCa cases were associated with a high surrogate level of OT exposure and a disease latency of more than 20 years from the initial OT exposure. The main route of OT exposure was likely through the skin. It is necessary to continue health examinations in these target groups.

著者

Areeya Jirathananuwat Krit Pongpirul

出版者

Japan Society for Occupational Health

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.59, no.5, pp.385-393, 2017-09-20 (Released:2017-09-28)

参考文献数

47

被引用文献数

50

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Introduction: Physically active (PA) people have a lower risk of various diseases, compared to those with sedentary lifestyles. Evidence on the effects of PA promoting programs in the workplace is large, and several systematic reviews (SR) and/or meta-analyses (MA) have been published. However, they have failed to consider factors that could influence interventions. This paper aimed to classify and describe interventions to promote PA in the workplace based on evidence from SR/MA. Method: A literature search for SR/MA was done using PubMed, Web of Science, and Science Direct (January 2006-February 2015). Quality assessment of SR/MA was performed using AMSTAR. The PRECEDE-PROCEED model was used for classifying the interventions into predisposing, enabling, reinforcing, environment, and policy domains of focus. Results: Eleven SR/MA included 220 primary studies, of which 139 (63%) were randomized controlled trials. Of 48 interventions identified, 22 (46%) and 17 (35%) focused on predisposing or enabling employees to have more PA, respectively. Of the 22 predisposing factors, 6 were information delivery, 5 were self-motivation, and 11 were program training. The enabling approaches were 12 instrument resources and 5 health service facilities. The reinforcing approaches were 4 incentive and 3 social support. The remaining interventions focused on the environmental development and policy regulation. Conclusions: This systematic meta-review classified interventions using appropriate framework and described the intervention pattern.

著者

Shoji Fukushima Tatsuya Kasai Yumi Umeda Makoto Ohnishi Toshiaki Sasaki Michiharu Matsumoto

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.17-0102-RA, (Released:2017-10-18)

被引用文献数

55

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Objectives: This report reviews the carcinogenicity of multi-walled carbon nanotubes (MWCNTs) in experimental animals, concentrating on MWNT-7, a straight fibrous MWCNT. Methods: MWCNTs were administered to mice and rats by intraperitoneal injection, intrascrotal injection, subcutaneous injection, intratracheal instillation and inhalation. Results: Intraperitoneal injection of MWNT-7 induced peritoneal mesothelioma in mice and rats. Intrascrotal injection induced peritoneal mesothelioma in rats. Intratracheal instillation of MWCNT-N (another straight fibrous MWCNT) induced both lung carcinoma and pleural mesothelioma in rats. In the whole body inhalation studies, in mice MWNT-7 promoted methylcholanthrene-initiated lung carcinogenesis. In rats, inhalation of MWNT-7 induced lung carcinoma and lung burdens of MWNT-7 increased with increasing concentration of airborne MWNT-7 and increasing duration of exposure. Conclusions: Straight, fibrous MWCNTs exerted carcinogenicity in experimental animals. Phagocytosis of MWCNT fibers by macrophages was very likely to be a principle factor in MWCNT lung carcinogenesis. Using no-observed-adverse-effect level-based approach, we calculated that the occupational exposure limit (OEL) of MWNT-7 for cancer protection is 0.15 μg/m3 for a human worker. Further studies on the effects of the shape and size of MWCNT fibers and mode of action on the carcinogenicity are required.

著者

Takeshi Ebara Ryohei Azuma Naoto Shoji Tsuyoshi Matsukawa Yasuyuki Yamada Tomohiro Akiyama Takahiro Kurihara Shota Yamada

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.17-0101-OA, (Released:2017-08-24)

被引用文献数

12

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Objectives: Objective measurements using built-in smartphone sensors that can measure physical activity/inactivity in daily working life have the potential to provide a new approach to assessing workers' health effects. The aim of this study was to elucidate the characteristics and reliability of built-in step counting sensors on smartphones for development of an easy-to-use objective measurement tool that can be applied in ergonomics or epidemiological research.Methods: To evaluate the reliability of step counting sensors embedded in seven major smartphone models, the 6-minute walk test was conducted and the following analyses of sensor precision and accuracy were performed: 1) relationship between actual step count and step count detected by sensors, 2) reliability between smartphones of the same model, and 3) false detection rates when sitting during office work, while riding the subway, and driving.Results: On five of the seven models, the inter-class correlations coefficient (ICC (3,1)) showed high reliability with a range of 0.956–0.993. The other two models, however, had ranges of 0.443–0.504 and the relative error ratios of the sensor-detected step count to the actual step count were ±48.7%–49.4%. The level of agreement between the same models was ICC (3,1): 0.992–0.998. The false detection rates differed between the sitting conditions.Conclusions: These results suggest the need for appropriate regulation of step counts measured by sensors, through means such as correction or calibration with a predictive model formula, in order to obtain the highly reliable measurement results that are sought in scientific investigation.

著者

Surat Hongsibsong Nalin Sittitoon Ratana Sapbamrer

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.59, no.2, pp.165-176, 2017-03-20 (Released:2017-03-28)

参考文献数

34

被引用文献数

31

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Objectives: This study aims to determine (1) total dialkylphosphate (ΣDAP) levels, occupational knowledge and practice, DNA damage, AChE activity, and health symptoms in rice, corn, and double-crop farmers; (2) the association of health symptoms with ΣDAP levels, occupational knowledge and practice, DNA damage, and AChE activity in farmers; and (3) the prevalence of health symptoms between farmers and non-farmers. Methods: A cross-sectional study was conducted by interviewing as well as analyzing urine and blood samples during July to August 2014. Results: There were no differences in ΣDAP levels, AChE activity, and occupational knowledge and practice scores among all farmer groups. In terms of health symptoms related to ΣDAP, AChE activity, DNA damage, and occupational knowledge and practice, pesticide-related symptoms were determined, including breathlessness, chest pain, dry throat, numbness, muscle weakness, cramp, headache, dizziness, eye irritation, white/red rash, and white/red pimple, which were classified as respiratory, muscle, nervous, and epithelial symptoms. A remarkable finding was that farmers had a significantly higher prevalence of muscle weakness (odds ratio (OR)=3.79) and numbness (OR=3.45) as compared with non-farmers. Conclusion: Our findings, therefore, suggest that a long-term low-level exposure to organophosphates (OPs) may be associated with an increasing prevalence of muscle symptoms. However, a further cohort study incorporating sensitive health outcomes and measurement of multiple pesticides monitoring on a larger scale is warranted.

著者

Jörn Nielsen Patrik Nilsson Anna Dahlman-Höglund Kerstin Kronholm Diab Maria Albin Monica Kåredal Bo Jönsson Aneta Wierzbicka Anders Gudmundsson

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.58, no.5, pp.470-476, 2016-09-20 (Released:2016-09-30)

参考文献数

34

被引用文献数

7

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Objective: Hairdressers have an increased risk for airway symptoms especially when using hair-bleaching powder containing persulfate. To minimize exposure, dust-free bleaching powder (DFP) has been made available. We studied the effects of regular powder (RP) or DFP on the airway symptoms of hairdressers with hair-bleaching associated rhinitis. Methods: Twelve hairdressers each performed three hair-bleachings on a wig in an exposure chamber. Half of the subjects used RP and half used DFP. Exposure to persulfate and ammonia was measured. Before and after each bleaching, the participants stated their degree of airway symptoms on a visual analogue scale. Nasal lavage and blood were sampled before exposure, after the last bleaching, and in the morning after exposure to measure inflammatory markers. Results: Exposure to persulfate was higher when using RP compared to DFP, 22 (11-55) vs. 12 (8-13) μg/m3; median (min-max). Exposure to ammonia did not differ between the groups. Both groups reported an increase in asthma-like symptoms and this increase was significant. Neutrophils, lymphocytes, and monocytes increased after exposure in both groups; monocytes decreased the day after. In nasal lavage, IL-8 was increased the morning after for both types of powder, and the increase was significant in the total group. IL-6 increased immediately after exposure and the day after only in the group using RP. Conclusions: Although DFP powder emits lower levels of persulfate, effects are still elicited in symptomatic hairdressers.

著者

Kaisa Törnroos (née Kirves) Claudia Bernhard-Oettel Constanze Leineweber

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.16-0295-OA, (Released:2017-05-25)

被引用文献数

10

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Objectives: This study identified perceived employability trajectories and their associations with sleeping difficulties and depressive symptoms over time. Methods: The sample was part of the Swedish Longitudinal Survey on Health from 2008 to 2014 (n = 4,583). Results: Two stable trajectories (high and low perceived employability over time) and three trajectories with changes (increasing, decreasing, and V-shaped perceived employability over time) were identified. Workers with stable low perceived employability reported more sleeping difficulties and depressive symptoms than those who perceived high or increasing employability. Conclusion: Perceived employability is a rather stable personal resource, which is associated with well-being over time. However, changes in perceived employability do not seem to be echoed in well-being, at least not as immediately as theoretically expected.

著者

Hilla Sumanen Olli Pietiläinen Eero Lahelma Ossi Rahkonen

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

pp.17-0024-BR, (Released:2017-05-12)

被引用文献数

5

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Objectives: Mental disorders are a key cause of sickness absence (SA) and challenge prolonging working careers. Thus, evidence on the development of SA trends is needed. In this study, educational differences in long SAs due to mental disorders were examined in two age groups among employees of the City of Helsinki from 2004 to 2013.Methods: All permanently and temporarily employed staff aged 18–34 and 35–49 were included in the analyses (n = ~27800 per year). SA spells of ≥14 days due to mental disorders were examined annually. Education was classified to higher and lower levels. Joinpoint regression was used to identify major turning points in SA trends.Results: Joinpoint regression models showed that lower educated groups had more long SAs spells due to mental disorders than those groups with higher education. SA trends decreased during the study period in all studied age and educational groups. Lower educated age groups had similar SA trends. Younger employees with higher education had the fewest SAs.Conclusions: A clear educational gradient was found in long SAs due to mental disorders during the study period. SA trends decreased from 2004 to 2013.

著者

Kai Yang Xuejun Jiang Shuqun Cheng Chengzhi Chen Xianqing Cao Baijie Tu

出版者

(公社)日本産業衛生学会

雑誌

Journal of Occupational Health (ISSN:13419145)

巻号頁・発行日

vol.59, no.1, pp.1-7, 2017-01-20 (Released:2017-01-24)

参考文献数

27

被引用文献数

21

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Objective: To evaluate the effects of occupational exposures to coke oven emissions (COEs) and benzo[a]pyrene (B[a]P) on the prevalence of hypertension and abnormal electrocardiogram (ECG) in coke oven workers. Methods: We included 880 coke oven workers and 710 oxygen employees in the exposed and control groups, respectively. Blood pressure (BP), ECG, blood lipid levels, and glucose levels of all subjects were measured. COE and B[a]P concentrations at the bottom, side, and top of the oven and control plants were estimated by weighing and high-performance liquid chromatography. Results: The COE concentration at the top and side was higher than that at the bottom (P < 0.05). The levels of B[a]P at the top and side significantly exceeded the limit value. Abnormal BP, ECG, the detection ratio of hypertension and left ventricular high voltage were significantly greater in the exposed group than in the control group (P < 0.05). The logistic regression analysis results revealed that age and B[a]P exposure were risk factors for hypertension in coke oven workers (P < 0.05) and both were risk factors for abnormal ECG (P < 0.05). Moreover, B[a]P exposure, age, and gender were risk factors for impaired fasting glucose in coke oven workers (P < 0.05). Conclusions: B[a]P and COE exposures are risk factors for hypertension and abnormal ECG in coke oven workers.