著者

Atsushi Mizuno Kenya Kusunose Takuya Kishi Jeffrey Rewley Chisa Matsumoto Yuki Sahashi Mari Ishida Shoji Sanada Memori Fukuda Tadafumi Sugimoto Miki Hirano Daisuke Yoneoka Masataka Sata Toshihisa Anzai Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-21-0944, (Released:2022-03-12)

参考文献数

13

被引用文献数

1

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Background:The impact of promotional tweets from the official journal account (forCirculation JournalandCirculation Reports) on article viewership has not been thoroughly evaluated.Methods and Results:We retrospectively collected journal viewership data forCirculation JournalandCirculation Reportsfrom March 2021 to August 2021. We compared viewership between articles with (n=15) and without (n=250) tweets. After 1 : 4 propensity score matching (15 tweeted articles and 60 non-tweeted matched controls), journal viewership metrics within 7 days of the tweeting date (and the hypothetical tweeting date), was larger in tweeted articles than non-tweeted articles (median [interquartile range] Abstract page views 89 [60–104] vs. 18 [8–41]).Conclusions:This pilot study suggests a positive relationship between journal-posted promotional tweets and article viewership.

著者

Atsushi Mizuno Takuya Kishi Chisa Matsumoto Fujimi Kawai Mari Ishida Shoji Sanada Seiji Hokimoto Yoshihiko Saito Keiko Yamauchi-Takihara Issei Komuro Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-19-0046, (Released:2019-09-19)

参考文献数

37

被引用文献数

1 4

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Background:Twitter has become increasingly popular at annual medical congresses as a platform to communicate to attendees. In contrast, Twitter is not as frequently used in Japan as compared with other countries. Herein, we reviewed the literature and discuss the potential role and risks of “tweet the meeting” in Japan.Methods and Results:We performed a literature review to consider the recent trend of tweeting the meeting, including benefits and how to tweet, as well as potential risks. Upon officially deciding to tweet the meeting, a number of societies and professional organizations developed strategies to enhance the attendees’ experience using multiple modalities and guides. Although there are several risks, we provide a concise guide to tweeting the meeting for the Japanese audience, which could be useful for understanding what should be done before and during a conference.Conclusions:The use of Twitter at medical congresses has many possibilities, and there are numerous potentials in many areas. We should discuss this in the light of the benefits for congress attendees in Japan.

著者

Atsushi Mizuno Takuya Kishi Chisa Matsumoto Mari Ishida Shoji Sanada Memori Fukuda Yuki Sahashi Tadafumi Sugimoto Miki Hirano Yusuke Yoshikawa Erika Yamamoto Takeshi Kimura Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-20-0093, (Released:2020-09-25)

参考文献数

10

被引用文献数

1 3

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Background:Twitter has become increasingly popular at annual medical congresses as a platform to communicate to attendees. The aim of this study is to reveal the twitter usage in the annual congress of the Japanese Cirsulation Society.Methods and Results:We compared the total number of tweets during the Japanese Circulation Society’s annual meetings in 2019 and 2020. The total number of tweets increased from 7,587 in 2019 to 23,867 in 2020. Most tweets were retweets (>70%), and approximately half of Twitter users tweeted only once.Conclusions:Twitter usage during the Japanese Circulation Society’s annual meeting increased from 2019 to 2020, and a large number of tweets were from Twitter ambassadors of the Japanese Circulation Society. However, further evaluation is needed, with future studies investigating the usefulness of this platform.

著者

Atsushi Mizuno Takuya Kishi Chisa Matsumoto Mari Ishida Shoji Sanada Memori Fukuda Yuki Sahashi Tadafumi Sugimoto Miki Hirano Yusuke Yoshikawa Erika Yamamoto Takeshi Kimura Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

vol.2, no.11, pp.691-694, 2020-11-10 (Released:2020-11-10)

参考文献数

10

被引用文献数

3

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Background:Twitter has become increasingly popular at annual medical congresses as a platform to communicate to attendees. The aim of this study is to reveal the twitter usage in the annual congress of the Japanese Cirsulation Society.Methods and Results:We compared the total number of tweets during the Japanese Circulation Society’s annual meetings in 2019 and 2020. The total number of tweets increased from 7,587 in 2019 to 23,867 in 2020. Most tweets were retweets (>70%), and approximately half of Twitter users tweeted only once.Conclusions:Twitter usage during the Japanese Circulation Society’s annual meeting increased from 2019 to 2020, and a large number of tweets were from Twitter ambassadors of the Japanese Circulation Society. However, further evaluation is needed, with future studies investigating the usefulness of this platform.

著者

Tadafumi Sugimoto Atsushi Mizuno Takuya Kishi Naoya Ito Chisa Matsumoto Memori Fukuda Nobuyuki Kagiyama Tatsuhiro Shibata Takashi Ohmori Shogo Oishi Jun Fuse Keisuke Kida Fujimi Kawai Mari Ishida Shoji Sanada Issei Komuro Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-20-0302, (Released:2020-04-29)

参考文献数

37

被引用文献数

20

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Background:Despite the rapidly increasing attention being given to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection, more commonly known as coronavirus disease 2019 (COVID-19), the relationship between cardiovascular disease and COVID-19 has not been fully described.Methods and Results:A systematic review was undertaken to summarize the important aspects of COVID-19 for cardiologists. Protection both for patients and healthcare providers, indication for treatments, collaboration with other departments and hospitals, and regular update of information are essentials to front COVID-19 patients.Conclusions:Because the chief manifestations of COVID-19 infection are respiratory and acute respiratory distress syndrome, cardiologists do not see infected patients directly. Cardiologists need to be better prepared regarding standard disinfection procedures, and be aware of the indications for extracorporeal membrane oxygenation and its use in the critical care setting.

著者

Takuya Kishi Atsushi Mizuno Mari Ishida Chisa Matsumoto Memori Fukuda Shoji Sanada Naoya Itoh Hideaki Oka Koichi Node Issei Komuro on behalf of the Collaborators and Advisors of the COVID-19 Task Force Mission Team of the Japanese Circulation Society and Directors of the Japanese Circulation Societies

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-20-0518, (Released:2020-09-25)

参考文献数

5

被引用文献数

6

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Background:The Japanese Circulation Society proposes recommendations for all healthcare professionals involved in cardiovascular medicine to protect them from infection and ensure that seriously ill patients requiring urgent care receive proper treatment.Methods and Results:Patients are divided into “Positive or suspected coronavirus disease 2019 (COVID-19)” and “All others”. Furthermore, tests and treatments are divided into emergency or standby. For each category, we propose recommendations.Conclusions:To maintain the cardiovascular care system, The Japanese Circulation Society recommends completely preventing nosocomial COVID-19 infections, ensuring adequate PPE necessary for healthcare personnel, and learning and implementing standard precautions.

著者

Atsushi Mizuno Jeffrey Rewley Takuya Kishi Chisa Matsumoto Yuki Sahashi Mari Ishida Shoji Sanada Memori Fukuda Tadafumi Sugimoto Miki Hirano Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-21-0063, (Released:2021-06-30)

参考文献数

12

被引用文献数

6

---

Background:The relationship between Twitter ambassadors and retweets has not been fully evaluated for “tweet the meeting” activity.Methods and Results:We collected data on the number of tweets and retweets during the Japanese Circulation Society’s (JCS) annual meetings in 2019, 2020, and 2021. After adjustment, JCS Twitter Ambassadors, selected by the JCS to increase the meeting’s visibility, increased the total number of retweets by 9%.Conclusions:This is the first report on the numerical relationship between JCS Twitter Ambassadors and the total number of retweets during an annual congress. Original tweets by JCS Twitter Ambassadors increased the number of retweets, but retweets by influencers were more effective at stimulating social media engagement.

著者

Atsushi Mizuno Jeffrey Rewley Takuya Kishi Chisa Matsumoto Yuki Sahashi Mari Ishida Shoji Sanada Memori Fukuda Tadafumi Sugimoto Miki Hirano Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

vol.3, no.7, pp.414-418, 2021-07-09 (Released:2021-07-09)

参考文献数

12

被引用文献数

6

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Background:The relationship between Twitter ambassadors and retweets has not been fully evaluated for “tweet the meeting” activity.Methods and Results:We collected data on the number of tweets and retweets during the Japanese Circulation Society’s (JCS) annual meetings in 2019, 2020, and 2021. After adjustment, JCS Twitter Ambassadors, selected by the JCS to increase the meeting’s visibility, increased the total number of retweets by 9%.Conclusions:This is the first report on the numerical relationship between JCS Twitter Ambassadors and the total number of retweets during an annual congress. Original tweets by JCS Twitter Ambassadors increased the number of retweets, but retweets by influencers were more effective at stimulating social media engagement.

著者

Fumie Nishizaki Mai Shimbo Noriko Fukue Chisa Matsumoto Satsuki Noma Satoko Ohno-Urabe Chizuko A. Kamiya Sachiko Kanki Tomomi Ide Hideo Izawa Tatsunori Taniguchi Atsuko Nakayama Yoshio Kobayashi

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-23-0063, (Released:2023-06-28)

参考文献数

23

被引用文献数

1

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Background: Equality in training opportunities, studying abroad, and satisfaction with work are not well investigated among Japanese cardiologists.Methods and Results: We studied cardiologists’ career development using a questionnaire that was emailed to 14,798 cardiologists belonging to the Japanese Circulation Society (JCS) in September 2022. Feelings regarding equality in training opportunities, preferences for studying abroad, and satisfaction with work were evaluated with regard to cardiologists’ age, sex, and other confounding factors. Survey responses were obtained from 2,566 cardiologists (17.3%). The mean (±SD) age of female (n=624) and male (n=1,942) cardiologists who responded to the survey was 45.6±9.5 and 50.0±10.6 years, respectively. Inequality in training opportunities was felt more by female than male cardiologists (44.1% vs. 33.9%) and by younger (<45 years old) than older (≥45 years old) (42.0% vs. 32.8%). Female cardiologists were less likely to prefer studying abroad (53.7% vs. 59.9%) and less satisfied with their work (71.3% vs. 80.8%) than male cardiologists. Increased feelings of inequality and lower work satisfaction were investigated among cardiologists who were young, had family care duties, and had no mentors. In the subanalysis, significant regional differences were found in cardiologists’ career development in Japan.Conclusions: Female and younger cardiologists felt greater inequality in career development than male and older cardiologists. A diverse workplace may prompt equality in training opportunities and work satisfaction for both female and male cardiologists.

著者

Mari Ishida Chisa Matsumoto Keisuke Kida Memori Fukuda Nobuyuki Kagiyama Kenya Kusunose Shingo Matsumoto Seitaro Nomura Takahiro Okumura Yasutsugu Shiono Tatsunori Taniguchi Atsushi Mizuno Takuya Kishi Koichi Node Issei Komuro Ken-ichi Hirata Directors of the Japanese Circulation Society

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.85, no.12, pp.2248-2251, 2021-11-25 (Released:2021-11-25)

参考文献数

8

著者

Mari Ishida Chisa Matsumoto Keisuke Kida Memori Fukuda Nobuyuki Kagiyama Kenya Kusunose Shingo Matsumoto Seitaro Nomura Takahiro Okumura Yasutsugu Shiono Tatsunori Taniguchi Atsushi Mizuno Takuya Kishi Koichi Node Issei Komuro Ken-ichi Hirata Directors of the Japanese Circulation Society

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-21-0822, (Released:2021-10-22)

参考文献数

8

著者

Tadafumi Sugimoto Atsushi Mizuno Daisuke Yoneoka Shingo Matsumoto Chisa Matsumoto Yuya Matsue Mari Ishida Michikazu Nakai Yoshitaka Iwanaga Yoshihiro Miyamoto Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-23-0072, (Released:2023-09-16)

参考文献数

15

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Background: During the COVID-19 pandemic, cardiovascular hospitalizations decreased and in-hospital mortality for ST-elevation myocardial infarction and heart failure increased. However, limited research has been conducted on hospitalization and mortality rates for cardiovascular disease (CVD) other than ischemic heart disease and heart failure.Methods and Results: We analyzed the records of 530 certified hospitals affiliated with the Japanese Circulation Society obtained from the nationwide JROAD-DPC database between April 2014 and March 2021. A quasi-Poisson regression model was used to predict the counterfactual number of hospitalizations for CVD treatment, assuming there was no pandemic. The observed number of inpatients compared with the predicted number in 2020 was 88.1% for acute CVD, 78% for surgeries or procedures, 77.2% for catheter ablation, and 68.5% for left ventricular assist devices. Furthermore, there was no significant change in in-hospital mortality, and the decrease in hospitalizations for catheter ablation and valvular heart disease constituted 47.6% of the total decrease in annual hospitalization costs during the COVID-19 pandemic.Conclusions: Cardiovascular hospitalizations decreased by more than 10% in 2020, and the number of patients scheduled for left ventricular assist device implantation decreased by over 30%. In addition, in response to the COVID-19 pandemic, annual cardiovascular hospitalization costs were reduced, largely attributed to decreased catheter ablation and valvular heart disease.

著者

Atsushi Mizuno Kenya Kusunose Takuya Kishi Jeffrey Rewley Chisa Matsumoto Yuki Sahashi Mari Ishida Shoji Sanada Memori Fukuda Tadafumi Sugimoto Miki Hirano Daisuke Yoneoka Masataka Sata Toshihisa Anzai Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.86, no.4, pp.715-720, 2022-03-25 (Released:2022-03-25)

参考文献数

13

被引用文献数

1

---

Background:The impact of promotional tweets from the official journal account (forCirculation JournalandCirculation Reports) on article viewership has not been thoroughly evaluated.Methods and Results:We retrospectively collected journal viewership data forCirculation JournalandCirculation Reportsfrom March 2021 to August 2021. We compared viewership between articles with (n=15) and without (n=250) tweets. After 1 : 4 propensity score matching (15 tweeted articles and 60 non-tweeted matched controls), journal viewership metrics within 7 days of the tweeting date (and the hypothetical tweeting date), was larger in tweeted articles than non-tweeted articles (median [interquartile range] Abstract page views 89 [60–104] vs. 18 [8–41]).Conclusions:This pilot study suggests a positive relationship between journal-posted promotional tweets and article viewership.

著者

Takuya Kishi Teruyuki Hirano Atsushi Mizuno Yoichiro Hashimoto Chisa Matsumoto Memori Fukuda Shoji Sanada Mari Ishida Koichi Node Susumu Miyamoto Issei Komuro on behalf of Directors of the Japan Stroke and Japanese Circulation Societies

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-20-0040, (Released:2020-05-13)

被引用文献数

5

著者

Takahiro Suzuki Atsushi Mizuno Takuya Kishi Jeffrey Rewley Chisa Matsumoto Yuki Sahashi Mari Ishida Shoji Sanada Memori Fukuda Tadafumi Sugimoto Miki Hirano Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-23-0043, (Released:2023-06-06)

参考文献数

16

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Background: Previous research has investigated the effectiveness of the “Tweet the Meeting” campaign, but the relationship between tweet content and the number of retweets has not been fully evaluated.Methods and Results: We analyzed the number of tweets and retweets during the Japanese Circulation Society’s 2022 annual meeting. The ambassador group had significantly more session- and symposium-related tweets than the non-ambassador group (P<0.001), associated with the nubmer of retweets. Symposium-related tweets with figures generated more retweets than those without figures (mean [±SD] 3.47±3.31 vs. 2.48±1.94 retweets per tweet, respectively; P=0.001).Conclusions: The study revealed that official meeting-designated Twitter ambassadors disseminate more educational content than non-ambassadors, and generated more retweets.

著者

Atsushi Mizuno Chisa Matsumoto Takuya Kishi Mari Ishida Shoji Sanada Memori Fukuda Issei Komuro Kenichi Hirata Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-21-0003, (Released:2021-01-29)

参考文献数

14

被引用文献数

5

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Background:Cardiovascular department restriction policies on procedures resulting from the COVID-19 pandemic have not been fully evaluated.Methods and Results:We performed a retrospective analysis of a nationwide survey performed by the Japanese Circulation Society in August 2020. The total response rate was 48.9% (651/1,331). The rate of restriction of cardiovascular procedures peaked in April. Exacerbations of heart failure due to hospital restrictions were noted in 43.8% of departments.Conclusions:Many departments restricted their cardiological procedures, and this rate changed according to the pandemic situation. The exacerbation of cardiovascular disease resulting from pandemic restrictions should not be ignored.

著者

Atsushi Mizuno Chisa Matsumoto Daisuke Yoneoka Takuya Kishi Mari Ishida Shoji Sanada Memori Fukuda Yoshihiko Saito Keiko Yamauchi-Takihara Hiroyuki Tsutsui Keiichi Fukuda Issei Komuro Koichi Node

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

pp.CR-21-0002, (Released:2021-02-05)

参考文献数

21

被引用文献数

6

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Background:From the early phase of the Coronavirus disease-2019 (COVID-19) pandemic, cardiologists have paid attention not only to COVID-19-associated cardiovascular sequelae, but also to treatment strategies for rescheduling non-urgent procedures. The chief objective of this study was to explore confirmed COVID-19 cardiology case experiences and departmental policies, and their regional heterogeneity in Japan.Methods and Results:We performed a retrospective analysis of a nationwide survey performed by the Japanese Circulation Society on April 13, 2020. The questionnaire included cardiology department experience with confirmed COVID-19 cases and restriction policies, and was sent to 1,360 certified cardiology training hospitals. Descriptive analysis and spatial autocorrelation analysis of each response were performed to reveal the heterogeneity of departmental policies. The response rate was 56.8% (773 replies). Only 16% of all responding hospitals experienced a COVID-19 cardiology case. High-risk procedures were restricted in more than one-fifth of hospitals, including transesophageal echocardiography (34.9%) and scheduled catheterization (39.5%). The presence of a cardiologist in the COVID-19 team, the number of board-certified cardiologists, any medical resource shortage and a state of emergency were positively correlated with any type of restriction.Conclusions:We found both low clinical case experiences with COVID-19 and restrictions of cardiovascular procedures during the first COVID-19 wave in Japan. Restrictions arising as a result of COVID-19 were affected by hospital- and country-level variables, such as a state of emergency.

著者

Ahmed Arafa Rena Kashima Yoshihiro Kokubo Masayuki Teramoto Yukie Sakai Saya Nosaka Haruna Kawachi Keiko Shimamoto Chisa Matsumoto Qi Gao Chisato Izumi

出版者

The Japanese Society for Hygiene

雑誌

Environmental Health and Preventive Medicine (ISSN:1342078X)

巻号頁・発行日

vol.28, pp.26, 2023 (Released:2023-05-03)

参考文献数

63

被引用文献数

1

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Background: Alcohol consumption is a modifiable lifestyle, but its role in heart failure (HF) development is controversial. Herein, we investigated the prospective association between alcohol consumption and HF risk.Methods: A total of 2,712 participants (1,149 men and 1,563 women) from the Suita Study were followed up every two years. Cox regression was applied to calculate the hazard ratios (HRs) and 95% confidence intervals (95% CIs) of HF risk for heavy drinking (≥46 g/day in men or ≥23 g/day in women) and never drinking compared to light drinking (<23 g/day in men or <11.5 g/day in women). Then, we combined the results of the Suita Study with those from other eligible prospective cohort studies in a meta-analysis using the random-effects model.Results: In the Suita Study, within a median follow-up period of 8 years, 319 HF cases (162 in men and 157 in women) were detected. In men, but not women, never and heavy drinking carried a higher risk of HF than light drinking: HRs (95% CIs) = 1.65 (1.00, 2.73) and 2.14 (1.26, 3.66), respectively. Alike, the meta-analysis showed a higher risk of HF among heavy drinkers: HR (95% CI) = 1.37 (1.15, 1.62) and abstainers: HR (95% CI) = 1.18 (1.02, 1.37).Conclusion: We indicated a J-shaped association between alcohol consumption and HF risk among Japanese men. The results of the meta-analysis came in line with the Suita Study. Heavy-drinking men should be targeted for lifestyle modification interventions.

著者

Ahmed Arafa Yoshihiro Kokubo Rena Kashima Chisa Matsumoto Masayuki Teramoto Kengo Kusano

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-23-0464, (Released:2023-09-22)

参考文献数

35

被引用文献数

1

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Background: Atrial fibrillation (AF) is the most diagnosed arrhythmia in clinical settings. The fatty liver index (FLI) is a marker of liver steatosis with potential cardiovascular implications. This study investigated whether FLI could predict the risk of AF.Methods and Results: We used data from the Suita Study, a Japanese population-based prospective cohort study. A total of 2,346 men and 3,543 women, aged 30–84 years, without prevalent AF were included and followed up. The diagnosis of AF was established during follow-up using electrocardiograms, hospital records, and death certificates. FLI was assessed during a baseline health checkup. Hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated for incident AF per FLI quintile and log-transformed FLI. Within a median 14.5 years of follow-up, 142 men and 105 women developed AF. Compared with women in the third (middle) FLI quintile, women in the first (lowest), fourth, and fifth (highest) quintiles showed a higher risk of AF, with multivariable-adjusted HRs of 2.37 (95% CI 1.06–5.31), 2.60 (95% CI 1.30–5.17), and 2.04 (95% CI 1.00–4.18), respectively. No corresponding associations were observed in men. The change in log-transformed FLI was not associated with the risk of AF in either sex.Conclusions: A U-shaped association between FLI and AF risk was detected in Japanese women. FLI could be a screening tool to detect women at high risk of developing AF.

著者

Ahmed Arafa Yoshihiro Kokubo Rena Kashima Masayuki Teramoto Yukie Sakai Saya Nosaka Keiko Shimamoto Haruna Kawachi Chisa Matsumoto Kengo Kusano

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-22-0378, (Released:2022-10-25)

参考文献数

38

被引用文献数

1

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Background: The incidence and prevalence of atrial fibrillation (AF) are increasing. The white blood cell (WBC) count is an indicator of systemic inflammation and is related to increased cardiovascular disease risk. Using data from the Suita Study, we investigated the association between WBC count and AF risk in the general Japanese population.Methods and Results: This prospective cohort study included 6,884 people, aged 30–84 years, with no baseline AF. Cox regression was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for AF incidence by WBC count quintile. Within a median follow-up period of 14.6 years, 312 AF cases were diagnosed. Compared with the lowest WBC count quintile, the highest quintile was associated with an increased AF risk (HR 1.57; 95% CI 1.07–2.29). The association was more pronounced among women than men (HR 2.16 [95% CI 1.10–4.26] and 1.55 [95% CI 0.99–2.44], respectively; P interaction=0.07), and among current than non-smokers (HR 4.66 [95% CI 1.89–11.50] and 1.61 [95% CI 1.01–2.57], respectively; P interaction=0.20). For each 1.0×109-cells/L increment in WBC count, AF risk increased by 9% in men (9% in non-smokers, 10% in current smokers) and 20% in women (13% in non-smokers, 32% in current smokers).Conclusions: A higher WBC count was positively associated with an elevated AF risk in the general Japanese population, especially in women who smoked.