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- July 20, 2008 |
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"Television Viewing Time and Blood Glucose Levels in Australian Adults"Dr. David Dunstan (biography)
English - 2005-04-15 - 24 minutes
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 | (17 slides) |
Summary :
Objective:
Sedentary behaviours, as well as physical activity, are important determinants of glycaemic control. We examined the associations of television (TV) time with fasting blood glucose (FBG) and 2-hour blood glucose levels (2-hr BG) in Australian adults.
Materials and Methods:
A population-based cross-sectional study (AusDiab) included 9,966 adults aged ≥ 25 years who were free from diagnosed diabetes mellitus. Measures of FBG and 2-hr BG were obtained from an oral glucose tolerance test. Self-reported TV time (previous week) was assessed using an interviewer-administered questionnaire. Anthropometric measurements (BMI, height) were made and bioimpedence performed to calculate body composition status (total body water).
Results:
In multivariate regression analyses adjusted for age, education, smoking, parental history of diabetes, dietary covariates and physical activity, TV time (hr/d) was positively associated with FBG and 2-hr BG in both men and women (P value range: 0.001-0.05). The regression coefficients for FBG [0.02 (95% CI: 0.002-0.04)] and 2-hr BG [0.15 (0.07-0.23)] in women and 2-hr BG [0.07 (95% CI: 0.004-0.14)] in men remained significant (P ≤ 0.03) following further adjustment for BMI, height and total body water. The association with FBG in men was no longer significant.
Conclusion:
These findings show stronger associations of TV time with 2-hour BG levels than with FBG. The mechanism for this difference is unclear and needs further exploration. A better understanding of these relationships will help to inform future research on inactivity and diabetes risk.
Learning objectives :
After viewing this presentation, participants will be able to discuss:
• The sedentary death syndrome
• The different types of sedentary behaviours
• The association between television viewing time and fasting and 2-hour blood glucose levels
Bibliographic references :
David W. Dunstan, PHD, Jo Salmon, PHD, Neville Owen, PHD, Timothy Armstrong, PHD, Paul Z. Zimmet, MD, Timothy A. Welborn, PHD, Adrian J. Cameron, MPH, Terence Dwyer, PHD, Damien Jolley, MSC and Jonathan E. Shaw, MD on behalf of the AusDiab Steering Committee Physical Activity and Television Viewing in Relation to Risk of Undiagnosed Abnormal Glucose Metabolism in Adults Diabetes Care. 2004 Nov;27(11):2603-9.
David W. Dunstan, Paul Z. Zimmet, Timothy A. Welborn, Maximilian P. de Courten, Adrian J. Cameron, Richard A. Sicree, Terry Dwyer, Stephen Colagiuri, Damien Jolley, Matthew Knuiman, Robert Atkins, and Jonathan E. Shaw The Rising Prevalence of Diabetes and Impaired Glucose Tolerance: The Australian Diabetes, Obesity and Lifestyle Study Diabetes Care 25: 829-834.
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