A nap every few days keeps CVD at bay?

  • Heart

  • International Clinical Digest
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Takeaway

  • In the continuing quest to rationalize naps, researchers report that 1 or 2 naps each week is linked to reduced risk for fatal and nonfatal cardiovascular disease (CVD) events.
  • Napping more often and duration of naps showed no such associations. 

Why this matters

  • Napping’s associations with CVD, negative or positive, have been a matter of controversy.
  • Most studies use only a binary (nap or not) or duration of napping, rather than examining nap frequency.
  • Clinicians can let patients know that periodic napping seems OK. 

Key results

  • Most people did not nap (58%).
  • Vs no napping at all, napping 1-2 times a week was linked to reduced CVD event risk: aHR, 0.52 (95% CI, 0.28-0.95).
  • By comparison, napping 6-7 times a week showed no benefit.
  • Nap duration showed no associations.

Study design

  • Population-based cohort study, Switzerland, 3462 participants with no known CVD, self-reported nap frequency and duration.
  • Follow-up, 5.3 years.
  • Funding: GlaxoSmithKline; Swiss National Science Foundation; others. 

Limitations

  • Self-reported nap data.
  • Focuses on afternoon naps.