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Journal of Epidemiology

Toshitaka Morishima, Yoshifumi Matsumoto, Nobuyuki Koeda, Hiroko Shimada, Tsutomu Maruhama, Daisaku Matsuki, Kayo Nakata, Yuri Ito, Takahiro Tabuchi, Isao Miyashiro
BACKGROUND: The presence of comorbidities in cancer patients may influence treatment decisions and prognoses. This study aimed to examine the impact of comorbidities on overall survival in Japanese patients diagnosed with major solid tumors. METHODS: To obtain patient-level information on clinical conditions and vital status, we performed a record linkage of population-based cancer registry data from Osaka Prefecture, Japan and administrative data produced under the Diagnosis Procedure Combination (DPC) system...
July 14, 2018: Journal of Epidemiology
Meishan Cui, Chifa Chiang, Renzhe Cui, Kaori Honjo, Hiroshi Yatsuya, Berry Moon Watson, Edolem Ikerdeu, Takashi Mita, Sherilynn Madraisau, Atsuko Aoyama, Hiroyasu Iso
BACKGROUND: Epidemiological evidence of dyslipidemia in Pacific Island countries is limited despite the knowledge that non-communicable diseases have a high burden in the region. We aimed to examine the prevalence and correlates of dyslipidemia among residents of Palau. METHODS: The Palau STEPwise approach to Surveillance (STEPS), which was conducted from 2011 through 2013, comprised three parts: behavioral risk factors; physical measurements; and biochemical tests, covering areas such as blood lipids...
July 14, 2018: Journal of Epidemiology
Ikuko Kashino, Mauro Serafini, Junko Ishihara, Tetsuya Mizoue, Ayaka Sunami, Koutatsu Maruyama, Norie Sawada, Manami Inoue, Akiko Nanri, Kayo Kurotani, Shamima Akter, Motoki Iwasaki, Shoichiro Tsugane
BACKGROUND: High dietary non-enzymatic antioxidant capacity (NEAC) has been inversely related to the incidence of degenerative diseases. However, few studies have investigated the validity and reproducibility of dietary NEAC estimated from a food frequency questionnaire (FFQ). We assessed the validity and reproducibility of FFQ-based dietary NEAC against a dietary record (DR). METHODS: Participants were 244 men and 253 women who completed a 28-day DR and FFQs. NEAC for each food item was estimated according to available databases of antioxidant capacity, as measured by ferric reducing-antioxidant power (FRAP), oxygen radical absorbance capacity (ORAC), and total radical-trapping antioxidant parameter (TRAP)...
July 14, 2018: Journal of Epidemiology
Tin Tin Su, Meram Azzani, Adeoye Philip Adewale, Nithiah Thangiah, Rosilawati Zainol, Hazreen Majid
BACKGROUND: The aim of this research is to assess the level of physical activity (PA) in relation to different socio-economic factors and to examine the effect of the recommended level of PA on the domains of quality of life (QoL) among residents of low-income housing in the metropolitan area of Kuala Lumpur, Malaysia. METHODS: This was a cross-sectional study that included 680 respondents from community housing projects. Reported PA was assessed using the Global Physical Activity Questionnaire (GPAQ) short form version 2...
June 30, 2018: Journal of Epidemiology
Satoshi Seino, Akihiko Kitamura, Yui Tomine, Izumi Tanaka, Mariko Nishi, Kumiko Nonaka, Yu Nofuji, Miki Narita, Yu Taniguchi, Yuri Yokoyama, Hidenori Amano, Tomoko Ikeuchi, Yoshinori Fujiwara, Shoji Shinkai
BACKGROUND: Preventing and reducing frailty is an important challenge for Japan in the next decade, especially in metropolitan areas. We launched a community-wide intervention trial (the Ota Genki Senior Project) in 2016 to develop effective community-based strategies for frailty prevention in metropolitan areas. This report describes the study design and baseline survey. METHODS: This study is a community-wide intervention trial that integrates participatory action research into a cluster non-randomized controlled trial for adults aged 65 years or older living in Ota City, Tokyo...
June 30, 2018: Journal of Epidemiology
Airi Amemiya, Takeo Fujiwara
BACKGROUND: The respiratory tract of children in low-income families is more likely to be exposed to toxins, which may lead to poor lung function. The purpose of this study was to elucidate the impact of low household income on lung function among children and adolescents in Japan. METHODS: We analyzed a population-based sample of 1,224 children aged 5 to 17 years old from the Japanese Study on Stratification, Health, Income, and Neighborhood (J-SHINE). Forced expiratory volume in 1 s (FEV1) and in 6 s (FEV6) was measured...
June 30, 2018: Journal of Epidemiology
Kenichi Mori, Keiko Wada, Kie Konishi, Yuko Goto, Fumi Mizuta, Sachi Koda, Takahiro Uji, Yatsuji Ito, Chisato Nagata
BACKGROUND: Cedar pollinosis is one of the most prevalent forms of seasonal allergic reaction in Japan. Only one prospective study has examined the association between cedar pollinosis and mortality. Using a symptom-based questionnaire on cedar pollinosis, we investigated the association of cedar pollinosis with all-cause and cause-specific mortality. METHODS: Data came from the Takayama Study, which recruited residents aged ≥35 years in 1992 from Takayama city in Gifu Prefecture, Japan...
June 23, 2018: Journal of Epidemiology
Junko Saito, Naoki Kondo, Masashige Saito, Daisuke Takagi, Yukako Tani, Maho Haseda, Takahiro Tabuchi, Katsunori Kondo
BACKGROUND: We explored the distinct trajectories of functional decline among older adults in Japan, and evaluated whether the frequency of outings, an important indicator of social activity, predicts the identified trajectories. METHODS: We analyzed data on 2,364 adults aged 65 years or older from the Japan Aichi Gerontological Evaluation Study. Participants were initially independent and later developed functional disability during a 31-month follow-up period...
June 23, 2018: Journal of Epidemiology
Hirokazu Tanaka, Noriko Ihana-Sugiyama, Takehiro Sugiyama, Mitsuru Ohsugi
BACKGROUND: Several epidemiological studies have determined the relationship between diabetes and the incidence and/or prevalence of recently identified comorbid conditions (cancer, periodontal disease, fracture, cognitive impairment, and depression). These relationships may vary by country or race/ethnicity. We aimed to systematically review studies in this field conducted with the Japanese population because such a review in the Japanese population has never been undertaken. METHODS: We conducted systematic literature searches in PubMed and Ichushi-Web databases for studies published until December 2016...
June 23, 2018: Journal of Epidemiology
Mizuki Saito, Yoshihiro Shimazaki, Toshiya Nonoyama, Yasushi Tadokoro
BACKGROUND: Many studies have reported that oral health status is associated with various systemic health issues. This study examined the correlations among oral health, lifestyle factors, and metabolic syndrome (MetS) in aged participants. METHODS: We analyzed cross-sectional oral and medical health checkup data from 2,379 participants aged 75 and 80 years. MetS was diagnosed according to the Harmonization criteria, with the exception of the criterion for central obesity, and body mass index was used instead of waist circumference...
June 16, 2018: Journal of Epidemiology
Yasutake Tomata, Kumiko Tanno, Shu Zhang, Michiko Sakai, Kaori Kobayashi, Noriko Kurasawa, Miki Tanaka, Yuka Kamada, Ichiro Tsuji, Fukuko Hiramoto
BACKGROUND: Although lower household economic status is known to be a risk factor for obesity among school-age children, such an association among toddlers remains unclear. The present study investigated the association between household economic status and obesity in toddlers. DESIGN: We conducted a cross-sectional study of children aged 4 years attending daycare centers in Japan. Information on subjective household economic status ["affluent", "neither", "less affluent", or "non-affluent"] was collected via questionnaire from the children's guardians in 2015...
June 9, 2018: Journal of Epidemiology
Ken Horisaki, Kunihiko Takahashi, Hidemi Ito, Shigeyuki Matsui
BACKGROUND: A recent meta-analysis compared the relative risks of colorectal cancer between the highest and lowest levels of coffee consumption in the Japanese population. However, this analysis did not define the risks with respect to specific exposure values when considering levels of coffee consumption per day in the study population. METHODS: We conducted a two-stage random-effects dose-response meta-analysis of the association between coffee consumption and colorectal cancer among the Japanese...
June 2, 2018: Journal of Epidemiology
Ayaka Igarashi, Jun Aida, Toshimi Sairenchi, Toru Tsuboya, Kemmyo Sugiyama, Shihoko Koyama, Yusuke Matsuyama, Yukihiro Sato, Ken Osaka, Hitoshi Ota
BACKGROUND: Annually, more than 1.2 million deaths due to road traffic accidents occur worldwide. Although previous studies have examined the association between cigarette smoking and injury death, the mortality outcome often included non-traffic accident-related deaths. This study aimed to examine the association between cigarette smoking and traffic accident death. METHODS: We conducted a prospective cohort study using data from the Ibaraki Prefectural Health Study conducted between 1993 and 2013...
May 31, 2018: Journal of Epidemiology
Masaki Sumi, Takashi Hisamatsu, Akira Fujiyoshi, Aya Kadota, Naoko Miyagawa, Keiko Kondo, Sayaka Kadowaki, Sentaro Suzuki, Sayuki Torii, Maryam Zaid, Atsushi Sato, Hisatomi Arima, Tomohiro Terada, Katsuyuki Miura, Hirotsugu Ueshima
BACKGROUND: Excessive alcohol intake has been shown to be associated with cardiovascular disease via metabolic pathways. However, the relationship between alcohol intake and obesity has not been fully elucidated. We aimed to examine the association of alcohol consumption with fat deposition and anthropometric measures. METHODS: From 2006-2008, we conducted a cross-sectional study in a population-based sample of Japanese men aged 40 to 79 years. Areas of abdominal visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) were calculated using computed tomography imaging...
May 31, 2018: Journal of Epidemiology
Yuki Fujita, Katsuyasu Kouda, Harunobu Nakamura, Masayuki Iki
BACKGROUND: Maternal pre-pregnancy weight has been reported to be positively associated with offspring weight. The association between maternal weight and offspring weight might be explained by maternal lifestyle. We investigated the strength of the relationship between maternal body mass index (BMI) at the beginning of pregnancy and offspring BMI at several growth stages. METHODS: The source population was all eighth graders registered in all public schools in the city of Fukuroi, Japan, in 2012...
May 26, 2018: Journal of Epidemiology
Enbo Ma, Hiroyasu Iso, Kazumasa Yamagishi, Masahiko Ando, Kenji Wakai, Akiko Tamakoshi
BACKGROUND: Oxidative stress, the imbalance between pro- and antioxidants, has been implicated in the etiology and pathophysiology of the incidence and mortality of many diseases. We aim to investigate the relations of dietary intakes of vitamin C and E and main carotenoids with all-cause mortality in Japanese men and women. METHODS: The Japan Collaborative Cohort Study for Evaluation of Cancer Risk had 22,795 men and 35,539 women, aged 40-79 years at baseline (1988-1990), who completed a valid food frequency questionnaire and were followed up to the end of 2009...
May 26, 2018: Journal of Epidemiology
Ayaka Kotemori, Junko Ishihara, Misako Nakadate, Norie Sawada, Motoki Iwasaki, Tomotaka Sobue, Shoichiro Tsugane
BACKGROUND: Acrylamide, a probable carcinogen to humans, forms during high temperature cooking. Dietary exposure to acrylamide among the Japanese population is unknown. We aimed to establish and validate a method to assess acrylamide exposure among the Japanese population using a food frequency questionnaire (FFQ) from the Japan Public Health Center-based prospective study. METHODS: Validation studies for the FFQ were conducted in 1994 (Cohort I, n = 215) and 1996 (Cohort II, n = 350)...
May 26, 2018: 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
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