Better sleep for adolescents means better cardiometabolic health

  • Cespedes Feliciano EM & al.
  • Pediatrics
  • 15 Jun 2018

  • curated by Emily Willingham, PhD
  • Clinical Essentials
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Takeaway

  • Adolescents who get efficient and sufficient sleep have better cardiometabolic profiles regardless of other activities that might promote obesity.
  • These children have lower abdominal adiposity and systolic BP and better high-density lipoprotein cholesterol values.

Why this matters

  • Few children meet the threshold for recommended sleep duration set by the National Sleep Foundation.

Key results

  • For every 55 minutes of sleep, adiposity decreased based on:
    • BMI z score (−0.15; 95% CI, −0.26 to −0.05 per interquartile range [IQR]); 
    • Sum of skinfold thicknesses: −2.05 (95% CI, −3.43 to −0.68) mm; 
    • Dual-energy radiograph absorptiometry (DXA) fat mass index (−0.52 kg/m2; 95% CI, −0.89 to −0.15 kg/m2); and 
    • DXA trunk fat mass index (−0.26; 95% CI, −0.43 to −0.08 kg/m2). 
  • Sleep efficiency showed similar associations with adiposity measures. 
  • With longer sleep duration and higher efficient sleep, metabolic risk scores fell:
    • −0.11 (95% CI, −0.19 to −0.02) points per IQR; and 
    • −0.08 (95% CI, −0.16 to −0.01) points, respectively. 

Study design

  • Cross-sectional study of 829 adolescents (mean age, 13.2 years; 51.5% girls).
  • Median sleep duration, 441.1 (IQR, 54.8) minutes/day.
  • Median sleep efficiency, 84.0% (IQR, 6.3).
  • Main outcome: metabolic risk score. 
  • Funding: National Institute of Child Health and Human Development, others.

Limitations

  • Study design, gold-standard polysomnography not used.

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