Television Viewing Time and Inflammatory-Related Mortality.

Purpose: Television (TV) viewing time is associated with increased risk of all-cause, cardiovascular and cancer mortality. While TV time is detrimentally associated with key inflammatory markers, the associations of TV time with other inflammatory-related mortality (with a predominant inflammatory, oxidative or infectious component, but not attributable to cancer or cardiovascular causes), are unknown. Methods: Among 8,933 Australian adults (4,593 never-smokers) from the baseline (1999/2000) Australian Diabetes, Obesity and Lifestyle Study (median follow-up, 13.6 years), we examined TV time in relation to non-inflammatory and inflammatory-related mortality (not attributable to cancer or cardiovascular causes, hereafter 'inflammatory-related' mortality). Because smoking has a significant inflammatory component, we also examined this relationship in never-smokers. Results: Of 896 deaths, 248 were attributable to cardiovascular disease, 346 to cancer, 130 to other inflammatory-related causes (71 for never-smokers), and 172 to non-inflammatory related causes (87 for never-smokers). Following multivariate adjustment for age, sex, education, household income, smoking status, alcohol intake, energy intake, diet, and cardiometabolic risk biomarkers (Model 3), every additional h/d of TV time was associated with increased risk of inflammatory-related mortality in the overall population (HR 1.12; 95% CI 1.00, 1.25) and in never-smokers (1.18; 1.00, 1.40). These results were attenuated after additional adjustment for leisure-time physical activity. Following multivariate adjustment (Model 3), no association was observed for non-inflammatory mortality in the overall population (0.95; 0.85, 1.07), but risk tended to decrease for never-smokers (0.85; 0.75, 1.02). Conclusion: In summary, before adjustment for leisure-time physical activity, TV time was associated with increased risk of inflammatory-related mortality. This is consistent with the hypothesis that high TV viewing may be associated with a chronic inflammatory state. (C) 2017 American College of Sports Medicine

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