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Table 2 Distribution of plasma leptin concentrations according to maternal self-reported nightly sleep duration during early pregnancy

From: Sleep duration and plasma leptin concentrations in early pregnancy among lean and overweight/obese women: a cross sectional study

Early pregnancy Hours of sleep during pregnancy
Plasma leptin (ng/ml) ≤5 6 7-8 ≥9
All women (N) 28 44 485 273
Mean ± SD 27.3 ±19.7 24.3 ± 16.8 24.3 ± 17.1 27.0 ± 17.3
(p* = 0.43) (p* = 0.98) (Reference) (p* = 0.04)
** Lean women (N) 23 34 379 205
Mean ± SD 20.6 ± 14.1 19.9 ± 13.6 20.5 ± 14.7 21.7 ± 13.4
(p* = 0.98) (p* = 0.82) (Reference) (p* = 0.31)
** Overweight/obese women (N) 5 10 106 68
Mean ± SD 58.3 ± 8.0 39.1 ± 18.8 38.2 ± 18.6 43.0 ± 18.2
(p* < 0.001) (p* = 0.98) (Reference) (p* = 0.09)
  1. *Pair-wise T-test p-value (each sleep duration group compared to reference group of 7–8 hours).
  2. **Lean women (BMI <25 kg/m2); Overweight/Obese women (BMI ≥25 kg/m2).