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Updated: Nov 4, 2025

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Do adolescent sedentary behavior levels predict type 2 diabetes risk in adulthood?
Jillian A Scandiffio1, Ian Janssen2,3
1School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, K7L 3N6, Canada.
Adolescent screen time, particularly watching TV and videos for over 4 hours daily, is linked to an increased risk of developing type 2 diabetes later in life. Other sedentary behaviors like computer use and reading showed no significant association.
Area of Science:
- Public Health
- Epidemiology
- Endocrinology
Background:
- Sedentary behaviors during adolescence are a growing public health concern.
- Understanding the long-term health implications of specific sedentary activities is crucial for preventative strategies.
- Type 2 diabetes is a significant chronic disease with increasing prevalence.
Purpose of the Study:
- To investigate the association between different types of adolescent sedentary behavior and the risk of developing type 2 diabetes in adulthood.
- To differentiate the impact of screen-based versus non-screen-based sedentary activities on future diabetes risk.
Main Methods:
- Utilized data from 3942 adolescents (age 16) in the 1970 British Cohort Study.
- Assessed sedentary behaviors (TV/video, computer, reading, homework) via questionnaire.
- Tracked incident type 2 diabetes cases until age 46 using Cox regression, controlling for covariates.
Main Results:
- Higher daily TV/video consumption (>4 hours) in adolescence was associated with a 2.06-fold increased risk of type 2 diabetes.
- Watching 2.1-4.0 hours of TV/videos daily did not significantly alter diabetes risk compared to ≤2 hours.
- Time spent on computers, reading, or homework showed no significant association with adult type 2 diabetes risk.
Conclusions:
- Excessive daily television and video viewing during adolescence is a significant risk factor for adult-onset type 2 diabetes.
- Non-screen-based sedentary behaviors and moderate computer use in adolescence do not appear to elevate type 2 diabetes risk.
- Public health interventions should consider targeting excessive screen time in adolescents to mitigate future diabetes risk.
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