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Journal of Epidemiology

Takahiro Tabuchi, Sho Fujihara, Tomohiro Shinozaki, Hiroyuki Fukuhara
BACKGROUND: Our objective in this study was to find determinants of high-school dropout in a deprived area of Japan using longitudinal data, including socio-demographic and junior high school-period information. METHODS: We followed 695 students who graduated the junior high school located in a deprived area of Japan between 2002 and 2010 for 3 years after graduation (614 students: follow-up rate, 88.3%). Multivariable log-binomial regression models were used to calculate the prevalence ratios (PRs) for high-school dropout, using multiple imputation (MI) to account for non-response at follow-up...
May 19, 2018: Journal of Epidemiology
Vien Quang Mai, Trịnh Thị Xuan Mai, Ngo Le Minh Tam, Le Trung Nghia, Kenichi Komada, Hitoshi Murakami
BACKGROUND: Dengue is a clinically important arthropod-borne viral disease with increasing global incidence. Here we aimed to estimate the prevalence of dengue infections in Khanh Hoa Province, central Viet Nam, and to identify risk factors for infection. METHODS: We performed a stratified cluster sampling survey including residents of 3-60 years of age in Nha Trang City, Ninh Hoa District and Dien Khanh District, Khanh Hoa Province, in October 2011. Immunoglobulin G (IgG) and immunoglobulin M (IgM) against dengue were analyzed using a rapid test kit...
May 19, 2018: Journal of Epidemiology
Hirokazu Tanaka, Koichi B Ishikawa, Kota Katanoda
BACKGROUND: There has been no nationwide analysis of travel time for hospital admission in Japan. Factors associated with travel time are also unknown. This study aimed to describe the distribution of travel time for hospital admission of cancer patients and identify underlying factors. METHODS: The individual data from the Patient Survey in 2011 were linked to those from the Survey of Medical Institutions in the same year, and GIS data were used to calculate driving travel time between the addresses of medical institutions and the population centers of municipalities where patients lived...
May 12, 2018: Journal of Epidemiology
Shama Virani, Jarin Chindaprasirt, Kosin Wirasorn, Aumkhae Sookprasert, Ongart Somintara, Damnern Vachirodom, Supinda Koonmee, Jirapon Srinakarin, Supot Kamsa-Ard, Krittika Suwanrungruang, Laura S Rozek, Hutcha Sriplung, Surapon Wiangnon
BACKGROUND: The northeast has the lowest incidence of breast cancer of all regions in Thailand, although national rates are increasing. The heterogeneity in subnational trends necessitates a comprehensive evaluation of breast cancer incidence trends and projections to provide evidence for future region-specific strategies that may be employed to attenuate this growing burden. METHODS: Joinpoint regression and age-period-cohort modeling were used to describe trends from 1988-2012...
May 12, 2018: Journal of Epidemiology
Takeshi Makiuchi, Tomotaka Sobue, Tetsuhisa Kitamura, Norie Sawada, Motoki Iwasaki, Taiki Yamaji, Taichi Shimazu, Manami Inoue, Shoichiro Tsugane
BACKGROUND: Smoking and alcohol are established risk factors for several types of cancer, but the effects on biliary cancers comprising biliary tract cancer (BTC) and intrahepatic bile duct cancer (IHBDC) have been inconclusive. METHODS: In this population-based prospective cohort study in Japan, we investigated the association of smoking and alcohol consumption with the risks of BTC and its subtypes, and IHBDC incidence in men and women. Furthermore, the association of smoking stratified by drinking status was investigated...
May 11, 2018: Journal of Epidemiology
Huanhuan Hu, Tohru Nakagawa, Hiroko Okazaki, Chihiro Nishiura, Teppei Imai, Toshiaki Miyamoto, Naoko Sasaki, Makoto Yamamoto, Taizo Murakami, Takeshi Kochi, Masafumi Eguchi, Kentaro Tomita, Satsue Nagahama, Keisuke Kuwahara, Isamu Kabe, Tetsuya Mizoue, Seitaro Dohi
BACKGROUND: We estimated the cumulative risk of type 2 diabetes from age 30 to 65 years in a large working population in Japan. METHODS: We used data from the Japan Epidemiology Collaboration on Occupational Health Study. Participants (46,065 men and 7,763 women) were aged 30-59 years, free of diabetes at baseline, and followed up for a maximum of 7 years. Incident type 2 diabetes was defined based on fasting and casual glucose, glycated hemoglobin, and current medical treatment for type 2 diabetes...
May 4, 2018: Journal of Epidemiology
Masayoshi Zaitsu, Ichiro Kawachi, Toyo Ashida, Katsunori Kondo, Naoki Kondo
BACKGROUND: Participation in community activities (eg, sports and hobby groups or volunteer organizations) is believed to be associated with better health status in the older population. We sought to (1) determine whether a greater diversity of group membership is associated with better self-rated health and (2) identify the key dimension of the membership diversity (eg, gender, residential area, or age). METHODS: We performed a cross-sectional study of 129,740 participants aged 65 years and older who were enrolled in the Japan Gerontological Evaluation Study in 2013...
April 28, 2018: Journal of Epidemiology
Hiroyuki Sasai, Yoshio Nakata, Haruka Murakami, Ryoko Kawakami, Satoshi Nakae, Shigeho Tanaka, Kazuko Ishikawa-Takata, Yosuke Yamada, Motohiko Miyachi
BACKGROUND: Physical activity questionnaires (PAQs) used in large-scale Japanese cohorts have rarely been simultaneously validated against the gold standard doubly labeled water (DLW) method. This study examined the validity of seven PAQs used in Japan for estimating energy expenditure against the DLW method. METHODS: Twenty healthy Japanese adults (9 men; mean age, 32.4 [standard deviation {SD}, 9.4] years, mainly researchers and students) participated in this study...
April 28, 2018: Journal of Epidemiology
Masae Otake, Kenichi Sakurai, Masahiro Watanabe, Chisato Mori
BACKGROUND: Several studies have reported the adverse effects of caffeine intake during pregnancy on fetal health. However, the effects of caffeine intake from green and oolong teas has not been investigated, despite the considerable consumption of these teas in Japan and the potential inhibitory effects of catechins-chemicals present at relatively high levels in green and oolong teas-on folic acid absorption. The potential associations of serum folate levels with caffeinated beverage consumption and catechin levels remain largely unstudied...
April 28, 2018: Journal of Epidemiology
Zhongyu Ren, Cong Huang, Haruki Momma, Yufei Cui, Kaijun Niu, Shota Sugiyama, Masakazu Nanno, Ryoichi Nagatomi
BACKGROUND: There is scarce epidemiological evidence regarding the relationships of the consumption of different types of vegetables or fruits with change in skeletal muscle strength. We prospectively examined the relationships among Japanese adults, using handgrip strength to assess skeletal muscle strength. METHODS: A 3-year study was carried out with 259 Japanese adults who were 22-68 years of age. The frequency of consumption of different types of vegetables or fruits were obtained using a validated self-administered dietary history questionnaire...
April 21, 2018: Journal of Epidemiology
Xiaoqiu Liu, Alessandra Lugo, Lorenzo Spizzichino, Takahiro Tabuchi, Giuseppe Gorini, Silvano Gallus
No abstract text is available yet for this article.
April 14, 2018: Journal of Epidemiology
Jeevitha Mariapun, Chiu-Wan Ng, Noran N Hairi
BACKGROUND: Economic development is known to shift the distribution of obesity from the socioeconomically more advantaged to the less advantaged. We assessed the socioeconomic trends in overweight, obesity, and abdominal obesity across a period of significant economic growth. METHODS: We used the Malaysian National Health and Morbidity Survey data sets for the years 1996, 2006, and 2011 to analyze the trends among adults aged 30 years and above. The World Health Organization's Asian body mass index cut-off points of ≥23...
April 14, 2018: Journal of Epidemiology
Shinichiro Uehara, Kyoko Kogawa Sato, Hideo Koh, Mikiko Shibata, Shigeki Kinuhata, Akiko Yamada, Keiko Oue, Hiroshi Kambe, Michio Morimoto, Tomoshige Hayashi
BACKGROUND: Metabolically healthy obesity seems to be a unique phenotype for the risk of cardiometabolic diseases. However, it is not known whether this phenotype is associated with the risk of proteinuria. METHODS: Study subjects were 9,185 non-diabetic Japanese male workers aged 40-55 years who had no proteinuria, an estimated glomerular filtration rate ≥60 mL/min/1.73 m2 , no history of cancer, and no use of antihypertensive or lipid-lowering medications at baseline...
April 7, 2018: Journal of Epidemiology
Fuminari Miura, Ryota Matsuyama, Hiroshi Nishiura
BACKGROUND: Foodborne norovirus outbreak data in Japan from 2005-2006, involving virological surveillance of all symptomatic and asymptomatic individuals, were reanalyzed to estimate the asymptomatic ratio of norovirus infection along with the risk of infection and the probability of virus shedding. METHODS: Employing a statistical model that is considered to capture the data-generating process of the outbreak and virus surveillance, maximum likelihood estimation of the asymptomatic ratio was implemented...
March 31, 2018: Journal of Epidemiology
Masaaki Yamada, Michikazu Sekine, Takashi Tatsuse
BACKGROUND: Prolonged screen time (ST), which includes TV viewing and gaming on smartphones and computers, is linked to poor health. Our aim was to explore the associations between school children with prolonged ST and parental internet use (IU) and lifestyles in Japan. METHODS: Children aged 6 to 13 years from the Super Shokuiku School Project, were surveyed using questionnaires in 2016. The survey assessed the grade, sex, and lifestyle of 1,659 children and parental internet use (IU) and lifestyle using Breslow's seven health behaviors...
March 24, 2018: Journal of Epidemiology
Keiko Murakami, Takayoshi Ohkubo, Hideki Hashimoto
BACKGROUND: Socioeconomic inequalities in oral health have been reported in developed countries, but the influence of marital status has rarely been considered. Our aim was to examine marital status differentials in the association between socioeconomic status (SES) and oral health among community-dwelling Japanese women. METHODS: From 2010 to 2011, a questionnaire survey was conducted among residents aged 25-50 years in Japanese metropolitan areas. Valid responses were received from 626 unmarried women and 1,620 married women...
March 24, 2018: Journal of Epidemiology
Reiji Kojima, Shigekazu Ukawa, Wenjing Zhao, Koji Suzuki, Hiroya Yamada, Kazuyo Tsushita, Takashi Kawamura, Satoe Okabayashi, Kenji Wakai, Hisashi Noma, Masahiko Ando, Akiko Tamakoshi
BACKGROUND: Most studies of plasma adiponectin (APN) and mortality among community-dwelling elderly focus on cardiovascular disease, but data on the relationship between plasma APN and cancer mortality is exiguous. We investigated whether APN is associated with cancer mortality in community-dwelling elderly people. METHODS: We conducted a case-cohort study within the New Integrated Suburban Seniority Investigation (NISSIN) Project using a randomly drawn sub-cohort of 697 subjects (351 men and 346 women; mean age 64...
March 24, 2018: Journal of Epidemiology
Vita Rovite, Yael Wolff-Sagi, Linda Zaharenko, Liene Nikitina-Zake, Elmars Grens, Janis Klovins
BACKGROUND: The Genome Database of the Latvian Population (LGDB) is a national biobank that collects, maintains, and processes health information, data, and biospecimens collected from representatives of the Latvian population. These specimens serve as a foundation for epidemiological research and prophylactic and therapeutic purposes. METHODS: Participant recruitment and biomaterial and data processing were performed according to specifically designed standard protocols, taking into consideration international quality requirements...
March 24, 2018: Journal of Epidemiology
Kota Katanoda
No abstract text is available yet for this article.
March 17, 2018: Journal of Epidemiology
Hiroshi Yatsuya, Yuanying Li, Yoshihisa Hirakawa, Atsuhiko Ota, Masaaki Matsunaga, Hilawe Esayas Haregot, Chifa Chiang, Yan Zhang, Koji Tamakoshi, Hideaki Toyoshima, Atsuko Aoyama
BACKGROUND: Relatively little evidence exists for type 2 diabetes mellitus (T2DM) prediction models from long-term follow-up studies in East Asians. This study aims to develop a point-based prediction model for 10-year risk of developing T2DM in middle-aged Japanese men. METHODS: We followed 3,540 male participants of Aichi Workers' Cohort Study, who were aged 35-64 years and were free of diabetes in 2002, until March 31, 2015. Baseline age, body mass index (BMI), smoking status, alcohol consumption, regular exercise, medication for dyslipidemia, diabetes family history, and blood levels of triglycerides (TG), high density lipoprotein cholesterol (HDLC) and fasting blood glucose (FBG) were examined using Cox proportional hazard model...
March 17, 2018: Journal of Epidemiology
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