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Table 1 Descriptive statistics of birth size and cortisol measures by sex, and difference between women and men (t test and χ2 test)

From: Is body size at birth related to circadian salivary cortisol levels in adulthood? Results from a longitudinal cohort study

Measure Women Men Total
  M (s) N M (s) N M (s) N P value*
Birth size        
Birth weight(g) 3281 (530) 372 3469 (598) 380 3376 (573) 752 < .001
Birth length(cm) 50.5 (2.2) 366 51.0 (2.5) 379 50.7 (2.4) 745 .002
Ponderal Index (kg/m3) 25.5 (2.4) 366 26.0 (2.9) 379 25.8 (2.7) 745 .008
Preterm or < 2500 g, n (%) 27 (7.3%) 372 33 (8.7%) 380 60 (8.0%) 752 .471
Cortisol at 43y        
AUC (nmol/L) 3.89 (1.6) 367 4.51 (1.6) 378 4.19 (1.6) 745 < .001
CAR (relative increase) 1.37 (1.6) 358 1.38 (1.7) 364 1.38 (1.7) 722 .861
Bedtime (nmol/L) 1.56 (2.0) 372 1.79 (2.1) 380 1.67 (2.0) 752 .007
  1. For birth size measures, arithmetic means (s) are presented, and for cortisol measures, geometric means (s)
  2. AUC = Area Under the Curve of diurnal cortisol, CAR = Cortisol Awakening Response