Journal of obesity · 2026
Risk of Type 2 Diabetes According to Body Mass Index, Television Viewing Time, and Their Combination in the Japanese Population: Findings From the Japan Collaborative Cohort Study.
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Ukawa Shigekazu, Zhao Wenjing, Ikehara Satoyo, Shirai Kokoro, Iso Hiroyasu, Tamakoshi Akiko
Аннотация
OBJECTIVE: This study aimed to investigate the associations of body mass index (BMI), television viewing time, and their combination with the risk of Type 2 diabetes among Japanese individuals using data from a large Japanese prospective cohort study.
METHODS: This prospective cohort study included 23,604 Japanese participants (9,284 males and 14,320 females) aged 40-79 years. Baseline data were collected between 1988 and 1990 using a self-administered questionnaire. In the 5-year follow-up survey, Type 2 diabetes was identified through self-reported physician diagnoses. We used a logistic regression model to analyze the associations of BMI and television viewing time, and their combination with the risk of Type 2 diabetes.
RESULTS: During the 5-year follow-up, 5.9% of participants developed incident Type 2 diabetes. BMI and prolonged TV viewing time were independently associated with an increased risk of developing Type 2 diabetes. Individuals with obesity (BMI ≥ 30 kg/m2) who viewed TV for ≥ 7 h had a twentyfold increase in diabetes risk (odds ratio: 21.42, 95% confidence interval: 7.23-63.49) compared with those with normal BMI (18.5-24.9 kg/m2) who viewed TV for ≤ 3 h, indicating a significant interaction.
CONCLUSIONS: Our study underscores the importance of addressing obesity and sedentary behavior to mitigate Type 2 diabetes risk.
METHODS: This prospective cohort study included 23,604 Japanese participants (9,284 males and 14,320 females) aged 40-79 years. Baseline data were collected between 1988 and 1990 using a self-administered questionnaire. In the 5-year follow-up survey, Type 2 diabetes was identified through self-reported physician diagnoses. We used a logistic regression model to analyze the associations of BMI and television viewing time, and their combination with the risk of Type 2 diabetes.
RESULTS: During the 5-year follow-up, 5.9% of participants developed incident Type 2 diabetes. BMI and prolonged TV viewing time were independently associated with an increased risk of developing Type 2 diabetes. Individuals with obesity (BMI ≥ 30 kg/m2) who viewed TV for ≥ 7 h had a twentyfold increase in diabetes risk (odds ratio: 21.42, 95% confidence interval: 7.23-63.49) compared with those with normal BMI (18.5-24.9 kg/m2) who viewed TV for ≤ 3 h, indicating a significant interaction.
CONCLUSIONS: Our study underscores the importance of addressing obesity and sedentary behavior to mitigate Type 2 diabetes risk.