How much sleep per night is best for your health?

Question:

Does shorter sleep duration contribute to mortality and incidence of chronic health conditions?

Conclusion:

Short sleepers have an increased risk of mortality and incidence of chronic health conditions when compared to ‘normal’ sleepers who sleep 7 hours per day.

Process:

  • 108 out of 2521 studies qualified for analysis.
  • Selected prospective studies at least 1-year in duration
  • Study quality ranked on a 9-point system; only 8-9 points included in analysis

Analysis:

  • Short sleep duration < 6 hours
  • Normal sleep duration 7-8 hours
  • Measures: comparative risk of mortality, diabetes, hypertension, cardiovascular disease, dyslipidemia, coronary heart diseases, obesity, and mortality.

Results:

Probability of events/conditions in short sleepers when compared to normal sleepers.

  • Mortality - 1.12 times the risk
  • Diabetes - 1.37 times the risk
  • Hypertension - 1.17 times the risk
  • Cardiovascular Disease - 1.16 times the risk
  • Coronary Heart Disease - 1.26 times the risk
  • Obesity - 1.38 times the risk
  • Dyslipidemia - not enough data
  • Depression - not enough data

Other Information:

  • Results do not indicate sleep causes the outcomes; but the duration contributes to the factors that impact things like mortality.
  • Studies do not account for the quality of sleep
Questions About CREATION Health Research?