. Author manuscript; available in PMC: 2016 Mar 8.

Published in final edited form as: Clin Endocrinol (Oxf). 2015 May 11;83(6):828–833. doi: 10.1111/cen.12768

Table 3.

Age, BMI SHBG, total testosterone and calculated free testosterone by group. All values are means ± SD

	Nonobese, younge (Group 1)	Obese, younger (Group 2)	Nonobese, older (Group 3)	Obese, older (Group 4)	P-value
n	1350	1207	674	440
Average age (years)	53·8 ± 9	54·6 ± 8	75·1 ± 7^†	71·9 ± 5^†	<0·001
Average BMI (kg/m²)	25·6 ± 3·4^‡	35·8 ± 5·5	25·4 ± 3·2^‡	35·1 ± 4·5^†	<0·001
SHBG (nmol/l)	49 ± 2^†	34 ± 23^†	54 ± 25^†	41 ± 20^†	<0·001
Total testosterone (nmol/l)	15 ± 7·7^†	10·7 ± 5·5	12·5 ± 6·3^‡	10·0 ± 5·5^ϕ	<0·001
Calculated free testosterone (pmol/l)	246 ± 128^†	208 ± 97^†	187 ± 100^ε	174 ± 83^ε	<0·001
% with total testosterone <9·8 nmol/l	23·2^†	47	32·6^†	52·2^ϕ	<0·001
% with calculated free testosterone <118 pmol/l	12·4	14	18·8^ε	22·2^ε	<0·001

^†

Different compared to all other groups.

^‡

Different compared to Group 2.

^ϕ

Different compared to Groups 1 and 3.

^ε

Different compared to Groups 1 and 2.