Table 3. Odds ratios for prevalent metabolic syndrome per quartile decrease of total testosterone, SHBG and free testosterone, stratified by age and BMI – results from cross-sectional studies.

	OR (95% CI)
	Total testosterone	SHBG	Free testosterone
Body mass index
<25 kg/m2	N = 2377	N = 1688	N = 1688
	1.43 (1.24–1.65)	2.20 (1.77–2.72)	1.22 (0.97–1.53)
25–30 kg/m2	N = 3969	N = 2714	N = 2714
	1.51 (1.40–1.62)	1.50 (1.35–1.66)	1.29 (1.16–1.44)
>30 kg/m2	N = 1720	N = 1145	N = 1145
	1.37 (1.24–1.51)	1.33 (1.18–1.50)	1.31 (1.15–1.50)
P interaction	0.40	0.003	0.67
Age
<40 years	N = 1080	N = 875	N = 875
	1.87 (1.57–2.22)	1.50 (1.22–1.84)	1.57 (1.29–1.91)
40–60 years	N = 3985	N = 3185	N = 3185
	1.78 (1.65–1.92)	1.68 (1.54–1.83)	1.52 (1.38–1.66)
≥60 years	N = 3029	N = 1492	N = 1492
	1.54 (1.43–1.66)	1.61 (1.43–1.82)	1.32 (1.16–1.50)
P interaction	0.004	0.11	0.01

Odds ratios are adjusted for age, smoking, alcohol consumption and physical activity. Abbreviations: SHBG  =  sex hormone-binding globulin; OR  =  odds ratio; CI  =  confidence interval.