Television viewing time and cardiovascular disease risk in physically active adults

  • Patterson F & al.
  • BMJ Open
  • 11 Jun 2020

  • curated by Sarfaroj Khan
  • UK Clinical Digest
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Takeaway

  • This study suggests that meeting physical activity (PA) recommendations (at least 150 minutes/week of moderate-intensity or 75 minutes/week of vigorous-intensity PA) may marginally ameliorate the association between television (TV) viewing and cardiovascular (CVD) risk.
  • 2.5 hours or more per day of television viewing confers a higher CVD risk as indicated by a higher mean body mass index (BMI) and mean 30-year Framingham risk score.

Why this matters

  • Findings highlight the independent association between TV viewing and CVD risk and suggest that reducing daily TV viewing to less than 2.5 hours, even in physically active adults, is a clinical and public health priority.

Study design

  • This population-based, cross-sectional study included 340,146 adults using data from the UK Biobank between 2006 and 2010.
  • Primary outcome: CVD risk measured by the 30-year Framingham risk score.
  • Funding: University of Delaware Research Foundation and others.

Key results

  • Linear regression models indicated that every additional hour of TV viewing was associated with a 3% increase in 30-year CVD risk (adjusted Coefficient [aCoeff], 0.03; Cohen’s d [d]=0.16; P<.0001 and meeting pa recommendations correlated with a decrease in cvd risk>
  • The interaction between TV viewing with meeting PA guidelines marginally correlated with CVD risk (aCoeff, 0.0010; d=0.01; P=.0142).
  • Every additional hour of TV viewing per day correlated with a 0.54 increase in BMI (aCoeff, 0.54; d=0.13; P<.0001 and meeting pa recommendations correlated with a decrease in bmi d="0.17;" p>
  • The interaction between TV viewing with meeting PA guidelines was not significantly associated with BMI (aCoeff, 0.0002; d
  • In regression tree models, TV viewing for >2.5 vs

Limitations

  • Recall and selection bias.
  • Study did not consider workplace sedentary behaviour and PA.