BMC Endocrine Disorders

Table 4 Comparisons of body composition between quartiles of Δ-cortisol in men and women.

From: Salivary cortisol differs with age and sex and shows inverse associations with WHR in Swedish women: a cross-sectional study

	WHR				Waist circumference
	n	m	sd	p	n	m	sd	p
Women
Adjusted for age
qrtl 1 Δ-cortisol	205	0.849	0.072	ref.	205	87.56	13.50	ref.
qrtl 2 Δ-cortisol	223	0.829	0.075	0.006	223	84.26	13.47	0.012
qrtl 3 Δ-cortisol	192	0.833	0.069	0.032	192	86.04	13.45	0.262
qrtl 4 Δ-cortisol	218	0.823	0.074	<0.001	218	83.59	13.47	0.003
Test for linearity:
between quartiles				0.001				0.016
continuously				0.003				0.041
Adjusted for model 2^a
qrtl 1 Δ-cortisol	194	0.846	0.070	ref.	194	86.70	13.34	ref.
qrtl 2 Δ-cortisol	217	0.829	0.074	0.018	217	84.19	13.29	0.056
qrtl 3 Δ-cortisol	181	0.833	0.081	0.104	181	86.13	13.33	0.680
qrtl 4 Δ-cortisol	216	0.824	0.073	0.003	216	83.56	13.30	0.018
Test for linearity:
between quartiles				0.009				0.071
continuously				0.009				0.119
Men
Adjusted for age
qrtl 1 Δ-cortisol	206	0.942	0.057	ref.	206	94.11	9.99	ref.
qrtl 2 Δ-cortisol	212	0.942	0.058	0.963	212	94.22	9.99	0.912
qrtl 3 Δ-cortisol	216	0.946	0.059	0.512	216	94.50	9.98	0.684
qrtl 4 Δ-cortisol	199	0.942	0.056	0.947	199	95.12	10.02	0.307
Test for linearity:
between quartiles				0.787				0.291
continuously				0.957				0.310

Differences between quartiles (qrtl) of Δ-cortisol (logarithmic morning salivary cortisol – logarithmic evening salivary cortisol) were examined by GLM (general linear model), using quartile 1 as reference.
^aModel 2 = age, leisure time physical activity, smoking, education, alkohol consumption, oral contraceptives, and estrogen replacements.

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