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Publications (43)

  • Yasutake Tomata · Kemmyo Sugiyama · Yu Kaiho · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Aim: Subjective memory complaints scales are expected to be useful for the prediction of future cognitive decline. In Japan, the "Kihon Checklist-Cognitive Function" (KCL-CF), which consists of three items, is used for primary screening of high-risk older adults. However, the predictive validity of the KCL-CF remains unknown. The aim of the present cohort study was to examine whether the KCL-CF can predict the incidence of dementia. Methods: Information on the KCL-CF score (0-3 points) was collected from community-dwelling older adults (≥65 years) through a questionnaire. Data on incident dementia were retrieved from the Long-term Care Insurance database. The Cox model and receiver operating characteristic curve analysis were used. Results: Among 13 974 participants, the 5.7-year rate of incident dementia was 8.8%. All KCL-CF items significantly predicted the risk of incident dementia even after adjustment for age and sex (P-trend < 0.0001). A higher KCL-CF score was associated with a higher risk of dementia; the age- and sex-adjusted hazard ratios (95% confidence interval) were 1.00 (reference) for a KCL-CF score of 0 points, 1.89 (1.65-2.15) for 1 point, 3.01 (2.59-3.50) for 2 points, and 6.20 (4.87-7.90) for 3 points (P-trend < 0.0001). A cut-off score of ≥1 points had a specificity of 65.1% and a sensitivity of 60.2%, and the area under the receiver operating characteristic curve was 0.65 (95% confidence interval 0.63-0.66). Conclusions: The KCL-CF was able to predict incident dementia. However, because a false-negativity rate of approximately 40% would be expected, the KCL-CF score alone might not be sufficient for screening of dementia incidence.
    Article · Aug 2016 · Geriatrics & Gerontology International
  • Shu Zhang · Yasutake Tomata · Kemmyo Sugiyama · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: The relationship between the body mass index (BMI) and the incidence of cause-specific disability remains unclear. We conducted a prospective cohort study of 12,376 Japanese individuals aged ≥65 years who were followed up for 5.7 years. Information on BMI and other lifestyle factors was collected via a questionnaire in 2006. Functional disability data were retrieved from the public Long-term Care Insurance database. BMI was divided into 6 groups (<21, 21–<23, 23–<25, 25–<27[reference], 27–<29 and ≥29). Hazard ratios and 95% confidence intervals for cause-specific disability were estimated using Cox proportional hazards regression models. A U-shaped relationship between BMI and functional disability was observed, with a nadir at 26. The nadir BMI values with the lowest disability risk were 28 for dementia, 25 for stroke, and 23 for joint disease. A low BMI (<23) was a risk factor for disability due to dementia, the HR values (95% CI) being 2.48 (1.70–3.63) for BMI <21 and 2.25 (1.54–3.27) for BMI 21 to <23; a high BMI (≥29) was a risk factor for disability due to joint disease, the HR value (95% CI) being 2.17 (1.40–3.35). There was no significant relationship between BMI and disability due to stroke. The BMI nadirs for cause-specific disability differed: a low BMI (<23) was a risk factor for disability due to dementia, and a high BMI (≥29) was a risk factor for disability due to joint disease. Because BMI values of 23 to <29 did not pose a significantly higher risk for each cause of disability, this range should be regarded as the optimal one for the elderly population.
    Article · Aug 2016 · Medicine
  • Yasutake Tomata · Kemmyo Sugiyama · Yu Kaiho · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Biological studies have shown that certain components of green tea may have protective effects on neurocognition. However, because of the lack of human epidemiological studies, the impact of green tea consumption on the incidence of dementia has never been confirmed. The objective of this cohort study was to clarify the association between green tea consumption and incident dementia.
    Article · Jul 2016
  • Yasutake Tomata · Kemmyo Sugiyama · Yu Kaiho · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Background: Although it has been speculated that the Japanese dietary pattern has a preventive effect against incident dementia, no reported study has yet investigated this issue. The present prospective cohort study investigated the association between dietary patterns and incident dementia in elderly Japanese subjects. Methods: We analyzed follow-up data covering a 5.7-year period for 14,402 older adults (≥65 years) participating in a community-based, prospective cohort study. Three dietary patterns (Japanese pattern, animal food pattern, and high-dairy pattern) were derived using principal component analysis of the consumption of 39 food and beverage items assessed using a food frequency questionnaire. Data on incident dementia were retrieved from the public Long-term Care Insurance database. Results: With 71,043 person-years of follow-up, incidence of dementia was 9.0%. The score for the Japanese dietary pattern was associated with a lower risk of incident dementia (hazard ratio of the highest quartile vs the lowest, 0.80; 95% confidence interval: 0.66–0.97; p-trend = .016). The animal food pattern and the high-dairy pattern showed no significant association with incident dementia. Conclusions: In this population of elderly Japanese individuals, the Japanese dietary pattern was associated with a decreased risk of incident dementia.
    Article · Jun 2016 · The Journals of Gerontology Series A Biological Sciences and Medical Sciences
  • Cong Huang · Yasutake Tomata · Haruki Momma · [...] · Ryoichi Nagatomi
    Article · May 2016 · Medicine and science in sports and exercise
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    Yosuke Shibata · Toshiyuki Ojima · Yasutake Tomata · [...] · Shuji Hashimoto
    [Show abstract] [Hide abstract] ABSTRACT: Objective On 11 March 2011, the Great East Japan Earthquake struck off Japan. Although some studies showed that the earthquake increased the risk of pneumonia death, no study reported whether and how much a tsunami increased the risk. We examined the risk for pneumonia death after the earthquake/tsunami. Design This is an ecological study. Setting Data on population and pneumonia deaths obtained from the Vital Statistics 2010 and 2012, National Census 2010 and Basic Resident Register 2010 and 2012 in Japan. Participants About 5.7 million participants residing in Miyagi, Iwate and Fukushima Prefectures during 1 year after the disaster were targeted. All municipalities (n=131) were categorised into inland (n=93), that is, the earthquake-impacted area, and coastal types (n=38), that is, the earthquake-impacted and tsunami-impacted area. Outcome measures The number of pneumonia deaths per week was totalled from 12 March 2010 to 9 March 2012. The number of observed pneumonia deaths (O) and the sum of the sex and age classes in the observed population multiplied by the sex and age classes of expected pneumonia mortality (E) were calculated. Expected pneumonia mortality was the pneumonia mortality during the year before. Standardised mortality ratios (SMRs) were calculated for pneumonia deaths (O/E), adjusting for sex and age using the indirect method. SMRs were then calculated by coastal and inland municipalities. Results 6603 participants died of pneumonia during 1 year after the earthquake. SMRs increased significantly during the 1st–12th weeks. In the 2nd week, SMRs in coastal and inland municipalities were 2.49 (95% CI 2.02 to 7.64) and 1.48 (95% CI 1.24 to 2.61), respectively. SMRs of coastal municipalities were higher than those of inland municipalities. Conclusions An earthquake increased the risk of pneumonia death and tsunamis additionally increased the risk.
    Full-text Article · Feb 2016 · BMJ Open
  • Kemmyo Sugiyama · Yumi Sugawara · Yasutake Tomata · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Recent epidemiological studies of the association between coffee consumption and the risk of bladder cancer have yielded conflicting results. The aim of the present study was to examine the association between coffee consumption and the incidence of bladder cancer on the basis of pooled data from two cohort studies carried out in Miyagi Prefecture, northeastern Japan. We delivered self-administered questionnaires inquiring about the frequency of coffee consumption and other lifestyle factors in 1990 for the Miyagi Cohort Study and in 1994 for the Ohsaki Cohort Study. We followed 73 346 individuals from both cohorts and identified 274 cases of bladder cancer during 17.6 years for the Miyagi Cohort Study and 13.3 years for the Ohsaki Cohort Study. The multivariate-adjusted hazard ratios (95% confidence intervals) of bladder cancer incidence for the individuals who drank coffee occasionally, 1-2 cups/day, and 3 or more cups/day compared with never drinkers were 1.22 (0.90-1.66), 0.88 (0.61-1.26), and 0.56 (0.32-0.99), respectively (Ptrend=0.04). The inverse association remained even after stratification for smoking status. These data indicate that there is a significant inverse association between coffee consumption and the risk of bladder cancer. Copyright
    Article · Feb 2016 · European Journal of Cancer Prevention
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    [Show abstract] [Hide abstract] ABSTRACT: Background: The association between social isolation and psychological distress among disaster survivors is inconclusive. In addition, because these previous studies were cross-sectional in design, the longitudinal association between time-varying social isolation and psychological distress was not clear. The present study examined the longitudinal association between social isolation and psychological distress after the Great East Japan Earthquake. Methods: We analyzed longitudinal data for 959 adults who had responded to the self-report questionnaires about Lubben Social Network Scale-6 (LSNS-6) and K6 in both a community-based baseline survey (2011) and a follow-up survey (2014) after the disaster. Participants were categorized into four groups according to changes in the presence of social isolation (<12/30 of LSNS-6) at two time points (2011 and 2014): "remained socially isolated", "became not socially isolated", "remained not socially isolated", and "became socially isolated". We defined a K6 score of ≥10/24 as indicating the presence of psychological distress. We used multiple logistic regression analysis to estimate the adjusted odds ratios (ORs) and 95% confidence intervals (CIs) to indicate how the change in social isolation was related to changes in psychological distress over 3 years. Results: Among the participants who had not shown psychological distress at the baseline, the rates of deterioration of psychological distress were significantly lower in participants who "became not socially isolated" (multivariate OR = 0.26, 95% CI = 0.08-0.70) and "remained not socially isolated" (multivariate OR = 0.49, 95% CI = 0.27-0.91), compared with participants who "remained socially isolated". Among the participants who had psychological distress at the baseline, the rate of improvement of psychological distress was significantly higher in participants who "remained not socially isolated" (multivariate OR = 2.61, 95% CI = 1.08-6.44). Conclusion: The present findings suggest that prevention of social isolation may be an effective public health strategy for preventing psychological distress after a natural disaster.
    Full-text Article · Jan 2016 · Social Science [?] Medicine
  • Kenji Honkura · Yasutake Tomata · Kemmyo Sugiyama · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Background: It has been suggested that constipation is associated with cardiovascular disease (CVD). The association between defecation frequency and CVD mortality in a large population has not been reported hitherto. The aim of this study was to examine whether defecation frequency is related to CVD mortality. Methods and results: A total of 45,112 eligible Japanese men and women aged 40-79 years participated in the Ohsaki Cohort study. Defecation frequency was evaluated at the baseline using a self-administered questionnaire. Hazard ratios (HRs) and 95% confidence intervals (CIs) for cardiovascular disease mortality were calculated according to defecation frequency (≥1 time/day, 1 time/2-3 days, ≤1 time/4 days) by the Cox proportional hazards model. During 13.3 years of follow-up, 2028 participants died due to CVD. Compared with those in the ≥1 time/day group, the risk of overall CVD mortality was significantly higher in the 1 time/2-3 days and ≤1 time/4 days groups; the multivariate HR (95%CI) for 1 time/2-3 days and ≤1 time/4 days was 1.21 (95% CI: 1.08-1.35) and 1.39 (95% CI: 1.06-1.81), respectively. Conclusion: A lower defecation frequency was associated with risk of CVD mortality in this Japanese population. Future studies, aiming at elucidating the mechanisms underlying the associations between chronic constipation and risk of CVD mortality, may be facilitated by our findings.
    Article · Jan 2016 · Atherosclerosis
  • Kemmyo Sugiyama · Yasutake Tomata · Yu Kaiho · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Epidemiological studies of the association between coffee consumption and dementia have yielded inconsistent results. Therefore, we investigated the association between coffee consumption and incident risk of dementia in an elderly Japanese population. 23,091 subjects aged ≥65 y living in Ohsaki City, northeastern Japan, responded to the baseline survey in 2006. Of these, we analyzed 13,137 subjects who gave informed consent and were not disabled at baseline. The outcome was the incidence of disabling dementia defined by usage of the Long-term Care Insurance database. We used the Cox proportional hazards regression model for multivariate analysis. During 5.7 y of follow-up period, we identified 1,107 cases of incident dementia. Overall, coffee consumption was significantly associated with a lower risk of incident dementia. The multivariate-adjusted HRs for the incidence of dementia according to coffee consumption categories (never, occasionally, 1-2 cups/d, and ≥3 cups/d) were 1.00, 0.73 (95% CI, 0.62-0.86), 0.72 (95% CI, 0.61-0.84), and 0.82 (95% CI, 0.65-1.02; p for trend = 0.009), respectively. In addition, this significant inverse association was more remarkable among women, non-smokers, and non-drinkers. Coffee consumption is significantly associated with a lower risk of incident dementia.
    Article · Dec 2015 · Journal of Alzheimer's disease: JAD
  • Yasutake Tomata · Yoshinori Suzuki · Miyuki Kawado · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: It has been unclear whether the prevalence of disability is higher in an area affected by natural disaster than in other areas even if more than one year has passed since the disaster. The aim of this ecological study was to examine whether the rate of increase in disability prevalence among the older population was higher in disaster-stricken areas during the 3 years after the Great East Japan Earthquake (GEJE) and tsunami. This analysis used public Long-term Care Insurance (LTCI) data covering 1570 municipalities. "Disaster areas" were considered to be the three prefectures most affected by the earthquake and tsunami: Iwate, Miyagi, and Fukushima. The outcome measure was the number of aged people (≥65 years) with LTCI disability certification. Rates of change in disability prevalence from January 2011 to January 2014 were used as the primary outcome variable, and compared by analysis of covariance between "coastal disaster areas", "inland disaster areas" and "non-disaster areas". The mean rate of increase in disability prevalence in coastal (14.7%) and inland (10.0%) disaster areas was higher than in non-disaster areas (6.2%) (P < 0.001). During the 3 years after the earthquake, the increase of disability prevalence from before the GEJE continued to be higher in the disaster-stricken areas.
    Article · Dec 2015 · Social Science & Medicine
  • [Show abstract] [Hide abstract] ABSTRACT: In March 2011, the Great East Japan Earthquake (GEJE), which was followed by a devastating tsunami, destroyed the societal and the public hygiene systems in Japanese coastal areas. Insomnia, the greatest issue among disaster victims, has detrimental effects on both physical and psychological health. Periodontitis causes chronic discomfort and inflammation, and little is known about its impact on insomnia. Three months after the earthquake, a health panel survey was conducted over four surveys, till September 2013, in which information regarding 8,015 adults was collected and used. In addition to the heath-related questionnaire, other variables including subjective symptoms of oral diseases were recorded, and the Athens Insomnia Scale was used to evaluate the severity of insomnia. The association between insomnia and periodontal disease was examined using multilevel logistic models on the panel data, after adjusting for sex, age, economic status, comorbidities, body mass index, post-traumatic stress reactions, habitual smoking and alcohol drinking, and the Kessler Psychological Distress Scale score. In addition to the higher prevalence of insomnia among GEJE victims, significant association was revealed between insomnia and gum problems (OR = 2.16, 95% CI = 1.43-3.26), and difficulty chewing (OR = 2.22, 95% CI = 1.40-3.51), after adjusting for all covariates. The present study revealed significant association between insomnia and periodontal disease among GEJE victims. This indicated that together, integrated oral health care for disaster victims would contribute not only to prevention of oral infectious diseases, but may also help alleviate other problems caused by these harmful events.
    Article · Sep 2015 · The Tohoku Journal of Experimental Medicine
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    [Show abstract] [Hide abstract] ABSTRACT: Many potentially modifiable risk factors for prostate cancer are also associated with prostate cancer screening, which may induce a bias in epidemiologic studies. We investigated the associations of body mass index (weight (kg)/height (m)(2)), smoking, and alcohol consumption with risk of fatal prostate cancer in Asian countries where prostate cancer screening is not widely utilized. Analysis included 18 prospective cohort studies conducted during 1963-2006 across 6 countries in southern and eastern Asia that are part of the Asia Cohort Consortium. Body mass index, smoking, and alcohol intake were determined by questionnaire at baseline, and cause of death was ascertained through death certificates. Analysis included 522,736 men aged 54 years, on average, at baseline. During 4.8 million person-years of follow-up, there were 634 prostate cancer deaths (367 prostate cancer deaths across the 11 cohorts with alcohol data). In Cox proportional hazards analyses of all cohorts in the Asia Cohort Consortium, prostate cancer mortality was not significantly associated with obesity (body mass index >25: hazard ratio (HR) = 1.08, 95% confidence interval (CI): 0.85, 1.36), ever smoking (HR = 1.00, 95% CI: 0.84, 1.21), or heavy alcohol intake (HR = 1.00, 95% CI: 0.74, 1.35). Differences in prostate cancer screening and detection probably contribute to differences in the association of obesity, smoking, or alcohol intake with prostate cancer risk and mortality between Asian and Western populations and thus require further investigation. © The Author 2015. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
    Full-text Article · Aug 2015 · American journal of epidemiology
  • Yasutake Tomata · Noriko Sato · Mana Kogure · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: Objectives: Interventions that promote physical activity to prevent psychological distress and disuse syndromes were carried out in disaster-stricken areas. However, the effect of these interventions to promote physical activity in disaster-stricken areas has not yet been fully clarified. The purpose of this study was to examine the health effects of promoting physical activity in a disaster-stricken area. Methods: We conducted an exercise intervention as part of a health survey project among residents of Ishinomaki-city, Miyagi, Japan in 2012. To determine if changes in health condition differed between intervention participants and nonparticipants, health condition data from 81 participants were compared with data from 81 nonparticipants selected by propensity score matching. Factors including sex, age, original address (pre-quake), and six outcome variables (psychological distress [K6 score], subjective health status, sleep duration, sleep quality, frequency of outings, and time spent walking) were used for matching. A linear mixed model was used for statistical analysis. Results: There were no significant differences in K6 score between participants and nonparticipants (P=0.913). Significant improvements were observed in subjective health status (P=0.011) and outing frequency (P=0.002), but not in other outcome variables. Conclusion: Subjective health status and outing frequency were significantly improved among participants of the exercise intervention. Exercise intervention may be an effective public health strategy in disaster-stricken areas.
    Article · Apr 2015 · [Nippon kōshū eisei zasshi] Japanese journal of public health
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    Cong Huang · Yasutake Tomata · Masako Kakizaki · [...] · Ryoichi Nagatomi
    [Show abstract] [Hide abstract] ABSTRACT: Population-based researches indicate that circulating adiponectin is inversely associated with muscle strength. However, interpretation of the findings has been limited by the use of a cross-sectional design. This study aimed to examine the prospective relationship between baseline circulating adiponectin concentration and change in muscular function-related physical performance in older adults. A 1-year prospective cohort study of Japanese community-dwelling elderly was conducted between 2002 and 2003. Four hundred thirty-four older persons participated in the measurements of physical function, including leg extension power, functional reach, timed up-and-go test, and 10-m maximum walking speed, at baseline and follow-up. After adjustment for potential covariates, higher serum adiponectin concentration was found to be significantly associated with poorer physical performance at baseline (leg extension power [watt], P < 0.001; functional reach [cm], P < 0.001; log timed up-and-go test, P = 0.007; log 10-m maximum walking speed, P < 0.001). The results of the prospective analysis by analysis of covariance indicated that the elderly with higher serum adiponectin concentrations (tertiles) at baseline tended to have a decreased performance in leg extension power (means [95% confidence interval]: lowest, -105 [-125, -85.7]; middle, -117 [-135, -97.8]; highest, -140 [-160, -120], watt, P for trend = 0.021) and timed up-and-go test (lowest, -0.08 [-0.28, -0.12]; middle, -0.10 [-0.29, 0.10]; highest, 0.28 [0.07, 0.48], s, P for trend = 0.019), but not two other functioning. High circulating adiponectin concentration may be an indicator of decreased physical performance, especially muscle strength, in older adults. Copyright © 2015 Elsevier B.V. All rights reserved.
    Full-text Article · Mar 2015 · Nutrition Metabolism and Cardiovascular Diseases
  • Yasutake Tomata · Toshimasa Sone · Wan‐Ting Chou · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: AimThe aim of the present ecological study was to evaluate the relationship between the rate of participation in Secondary Preventive Services (SPS) and the incidence of disability in Japanese municipalities.Methods We used the national statistics data for Long-term Care Insurance (LTCI), because all Japanese people aged ≥65 years are eligible for LTCI services depending on their functional status assessed by a national uniform standard in all municipalities. The disability incidence rate for the 2-year period in 2009–2010 was compared among five different levels of SPS participation in 2006–2008. The primary outcome was the sum total disability incidence rate in LTCI from 2009 to 2010. The outcome was divided according to disability level into three patterns: “all levels (Support Level 1 – Care Level 5)”, “mild disability (Care Level ≤1)” and “moderate to severe disability (Care Level ≥2)”.ResultsThere was a significant inverse association between the SPS participation rate and disability incidence rate. Among 1541 municipalities, those in the highest SPS participation rate quintile (≥9.79 per 1000 elderly population) had a lower disability incidence rate for all levels than those in the lowest quintile (<1.86 per 1000 elderly population; absolute rate difference 0.6%; age-adjusted incident rate ratio 0.94; 95% CI 0.89–0.99). This inverse association was observed for mild disability and not for moderate to severe disability.Conclusions Municipalities with a higher SPS participation rate have a lower incidence rate of mild disability. SPS could be an effective health policy for containing mild disability incidence among the elderly. Geriatr Gerontol Int 2015; ●●: ●●–●●.
    Article · Feb 2015 · Geriatrics & Gerontology International
  • Yasutake Tomata · Ichiro Tsuji · Kemmyo Sugiyama · [...] · Toshiyuki Ojima
    [Show abstract] [Hide abstract] ABSTRACT: Objectives: An earlier study using the data from the Japanese Long-term Care Insurance (LTCI) system reported a scenario for achieving the target of Health Japan 21 (the second term): future gains in health expectancy from 2011 to 2020 must be larger than gains in expectancy. According to this scenario (the Healthy Life Expectancy Extension Scenario), the proportion of disability (cases≥Care Level 2 in LTCI disability certification) will gradually decrease by 1% per year from 2011. The purpose of this study was to estimate the cost savings in long-term care and medical care if the Healthy Life Expectancy Extension Scenario is achieved. Methods: We used data from Japanese national statistics and a survey conducted in Osaki city, Miyagi. The natural course of disability cases (≥Care Level 2) was estimated under the assumption that the future population composition would be equal to the population projections for Japan and the future proportion of disabilities for each age grade would be equal to that of 2010. Then, the decrease in the number of disabilities based on the Healthy Life Expectancy Extension Scenario was calculated. Finally, the cost savings in long-term care and medical care associated with the assumed decrease in the number of disability cases was calculated. Results: When the disability cases (≥Care Level 2) were shifted to "no disability certification (not requiring care)," a total estimated cost reduction of 5,291 billion yen was achieved from 2011 to 2020. Furthermore, a total estimated reduction of 2,491 billion yen was achieved for the same period when all disability shifts to "Care Level 1" were accounted for. Conclusion: As a rough calculation, if the Health Japan 21 (second term) target is achieved, approximately 2,500-5,300 billion yen will be saved in the cost of long-term care and medical care.
    Article · Dec 2014 · [Nippon kōshū eisei zasshi] Japanese journal of public health
  • Yumi Kumagai · Wan-Ting Chou · Yasutake Tomata · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: To evaluate dietary patterns in relation to colorectal cancer risk in Japanese. We prospectively assessed the association between dietary patterns among the Japanese and the risk of colorectal cancer. Dietary information was collected from 44,097 Japanese men and women aged 40-79 years without a history of cancer at the baseline in 1994. During 11 years of follow-up, we documented 854 cases of colorectal cancer, which included 554 cases of colon cancer and 323 cases of rectal cancer. Factor analysis (principal component analysis) based on a validated food frequency questionnaire identified three dietary patterns: (1) a Japanese dietary pattern, (2) an "animal food" dietary pattern, and (3) a high-dairy, high-fruit-and-vegetable, low-alcohol (DFA) dietary pattern. After adjustment for potential confounders, the DFA pattern was inversely associated with the risk of colorectal cancer (hazard ratio of the highest quartile vs the lowest, 0.76; 95 % confidence interval 0.60-0.97; p for trend = 0.02). When colon and rectal cancers were separated, the inverse association between the DFA pattern and cancer risk was observed for rectal cancer (p for trend = 0.003), but not for colon cancer (p for trend = 0.43). No apparent association was observed for either the Japanese dietary pattern or the "animal food" dietary pattern. The DFA dietary pattern was found to be inversely associated with the risk of colorectal cancer. This association was observed for rectal cancer, but not for colon cancer.
    Article · Mar 2014 · Cancer Causes and Control
  • Yasutake Tomata · Masako Kakizaki · Yoshinori Suzuki · [...] · Ichiro Tsuji
    [Show abstract] [Hide abstract] ABSTRACT: To examine the hypothesis that disability prevalence has increased to a greater degree in the areas severely affected by the earthquake and tsunami of 11 March 2011 than in other areas. Longitudinal analysis using public statistics data from the Ministry of Health, Labour and Welfare in Japan. The analysis included 1549 municipalities covered by the Long-term Care Insurance (LTCI) system. 'Disaster areas' were defined as three prefectures (Iwate, Miyagi, Fukushima). The outcome measure was the number of aged people (≥65 years) with LTCI disability certification. Rates of change in disability prevalence from February 2011 to February 2012 were used as the primary outcome variable, and were compared by analysis of covariance between 'Coastal disaster areas', 'Inland disaster areas' and 'Non-disaster areas'. Regarding disability prevalence at all levels, the mean value of the increase rate in Coastal disaster areas (7.1%) was higher than in Inland disaster areas (3.7%) and Non-disaster areas (2.8%) (p<0.001). The areas that were severely affected by the earthquake and tsunami had a significantly higher increase in disability prevalence during the 1 year after the earthquake disaster than other areas.
    Article · Feb 2014 · Journal of epidemiology and community health
  • Mana Kogure · Yasutake Tomata · Wan-Ting Chou · [...] · Ichiro Tsuji
    Article · Jan 2014