Television Viewing Time Linked to All-Cause Mortality

Increased all-cause mortality with TV viewing, not computer or driving time, after adjustment

FRIDAY, June 27, 2014 (HealthDay News) -- Television viewing, but not computer or driving time, is associated with all-cause mortality, according to a study published online June 25 in the Journal of the American Heart Association.

Francisco Javier Basterra-Gortari, M.D., Ph.D., from the University of Navarra in Spain, and colleagues examined the correlation between different sedentary behaviors and all-cause mortality in a prospective, dynamic cohort study. Participants included 13,284 Spanish university graduates (mean age, 37 years) who were followed for a median of 8.2 years. The correlations between sedentary behaviors at baseline (television, computer, and driving time) and all-cause mortality were assessed.

The researchers found that, after adjustment for age, sex, smoking status, total energy intake, Mediterranean diet adherence, body mass index, and physical activity, the incidence rate ratios per two hours per day for all-cause mortality were 1.40 (95 percent confidence interval [CI], 1.06 to 1.84) for television viewing; 0.96 (95 percent CI, 0.79 to 1.18) for computer use; and 1.14 (05 percent CI, 0.90 to 1.44) for driving. Participants reporting three or more versus less than one hour/day of television viewing had a more than two-fold increase in mortality (incidence rate ratio, 2.04; 95 percent CI, 1.16 to 3.57).

"Further cohort studies and trials designed to assess whether reductions in television viewing are able to reduce mortality are warranted," the authors write. "The lack of association between computer use or time spent driving and mortality needs further confirmation."

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