|Type of Study||Number of Studies||Number of participants||Narrative recommendation and main findings|
|Longitudinal||2||1675||> 2 hr of TV per day is associated with higher serum cholesterol levels. > 1.2 hrs of TV per day is associated with increased systolic blood pressure.|
|Cross sectional||9||17339||> 2 of screen time per day is associated with higher blood pressure and increased risk for metabolic syndrome.|
|Total of all studies||11||19014||
Increased screen time is associated with increased risk for markers of metabolic syndrome and cardiovascular disease. Risk increases in a dose-response manner.|
Mean Downs and Black score = 21.7 (± 2.0), Level 3 evidence.