- 著者
- Akinori YAEGASHI Takashi KIMURA Takumi HIRATA Akiko TAMAKOSHI
- 出版者
- Center for Academic Publications Japan
- 雑誌
- Journal of Nutritional Science and Vitaminology (ISSN:03014800)
- 巻号頁・発行日
- vol.68, no.3, pp.155-161, 2022-06-30 (Released:2022-06-30)
- 参考文献数
- 20
- 被引用文献数
- 3
This systematic review and meta-analysis aimed to investigate the association between green tea consumption and depression symptom risk, using subgroup analyses concerning study design, geographical region of study, adjustment factors, age, cut-off for the highest consumption category, and depression assessment methods applied. We used PubMed to search for relevant literature. The inclusion criteria were studies that (a) investigated this association as a primary or secondary outcome; (b) published in English; (c) assessed and reported hazard ratios or odds ratios (ORs) and the corresponding 95% confidence intervals (CIs) for depression symptoms, or included sufficient information to allow their calculation; (d) included at least two groups differentiated based on green tea consumption (e.g., high and low); (e) reported the prevalence of depression symptoms in each group; and (f) reported the sample size for each group. Eight articles were found to meet all criteria. The results indicated that high green tea consumption is inversely associated with depression symptoms. The pooled OR was 0.66 (95% CI 0.58–0.74), and significant heterogeneity was not observed. Subgroup analysis showed that study design impacted results (cohort study [one study]: OR=0.29, 95% CI=0.04–2.14; cross-sectional study [seven studies]: OR=0.66, 95% CI=0.59–0.75). These findings suggest that green tea consumption reduces the risk of depression symptoms. This association was also observed in the cohort study included, but the results in which did not reach the significant level. Therefore, further cohort studies are needed to confirm the potential causal relationship in this regard.
- 著者
- Akinori Yaegashi Takashi Kimura Kenji Wakai Hiroyasu Iso Akiko Tamakoshi
- 出版者
- Japan Epidemiological Association
- 雑誌
- Journal of Epidemiology (ISSN:09175040)
- 巻号頁・発行日
- pp.JE20230076, (Released:2023-11-18)
- 参考文献数
- 28
Background: We prospectively examined the association between total fat and fatty acid intake and type 2 diabetes (T2D) among Japanese adults.Methods: This study was conducted using data from the Japan Collaborative Cohort Study for Evaluation of Cancer Risk (JACC). A validated food frequency questionnaire evaluated the intake of total fat and fatty acids. Diabetes was assessed using self-reported data. Multivariable logistic regression analysis was performed to calculate the odds ratios (ORs) and 95% confidence intervals (CIs) of incident T2D across quintiles of total fat and fatty acid intake after adjusting for potential confounders.Results: A total of 19,088 non–diabetic participants (age range, 40–79 years) enrolled in the JACC between 1988 and 1990 were included in this study. During the five-year study period, 494 the participants developed T2D. The OR of T2D for the highest versus lowest quintiles was 0.58 (95% CI, 0.37–0.90) for total fat, 0.78 (95% CI, 0.51–1.20) for saturated fatty acid (SFA), 0.55 (95% CI, 0.35–0.86) for monounsaturated fatty acids (MUFA), 0.61 (95% CI, 0.39–0.96) for polyunsaturated fatty acids (PUFA), 0.64 (95% CI, 0.42–0.99) for n-3 PUFA, and 0.70 (95% CI, 0.45–1.09) for n-6 PUFA. Total fat and fatty acid (except SFA and n-6 PUFA) intake were inversely associated with T2D in men. Total fat and fatty acid intake were not associated with T2D in women.Conclusion: Higher intakes of total fats, MUFA, PUFA, and n-3 PUFA were inversely associated with T2D among Japanese men.