Table 2.

Bioavailable testosterone levels stratified by age, BMI, smoking status, diabetes, CVD, hypertension, and hyperlipidemia.

	N	Mean	Median	Range	P value
All	7940	7.0 ± 2.7	6.6	0.7–30.2
Age
20–25	701	9.0 ± 3.2	8.5	1.0–23.1	<0.001
25–30	1190	8.1 ± 3.0	7.6	1.6–30.2
30–35	1279	7.4 ± 2.6	7.0	1.3–18.2
35–40	827	7.0 ± 2.4	6.7	1.8–17.7
40–45	606	7.0 ± 2.6	6.5	2.4–25.6
45–50	578	6.8 ± 2.3	6.4	1.5–16.8
50–55	675	6.3 ± 2.1	6.0	1.5–13.1
55–60	773	6.0 ± 2.1	5.6	0.7–18.7
60–65	740	5.9 ± 1.9	5.5	1.3–13.2
65–70	571	5.6 ± 1.9	5.4	1.2–14.5
BMI (kg/m2)
(<18.5)	122	8.0 ± 3.3	7.3	1.2–17.5	<0.001
(18.5, 25)	2892	7.7 ± 2.8	7.4	0.7–30.2
(25, 30)	3146	6.8 ± 2.6	6.4	1.4–28.7
(30, 35)	1240	6.2 ± 2.3	5.8	1.3–17.7
(35, 40)	361	5.7 ± 2.0	5.2	2.2–12.6
(>40)	124	5.4 ± 2.2	4.9	2.0–15.9
Unknown	55	7.5 ± 2.8	6.8	3.2–16.1
Smoking status
Never	4829	7.1 ± 2.7	6.6	1.0–30.2	<0.001
Now	1774	7.2 ± 2.7	6.9	0.7–25.6
Past	1113	6.4 ± 2.4	6.0	1.6–20.4
Unknown	224	7.1 ± 2.6	6.8	2.3–14.1
Diabetes
No	6864	7.2 ± 2.7	6.8	1.0–30.2	<0.001
Yes	1076	6.0 ± 2.1	5.6	0.7–18.7
CVD
No	7471	7.1 ± 2.7	6.7	0.7–30.2	<0.001
Yes	469	5.8 ± 2.0	5.5	1.3–14.5
Hypertension
No	6378	7.3 ± 2.7	6.9	0.7–30.2	<0.001
Yes	1562	6.0 ± 2.1	5.6	1.3–18.7
Hyperlipidemia
No	6235	7.2 ± 2.7	6.8	0.7–30.2	<0.001
Yes	1705	6.3 ± 2.2	6.0	1.2–18.7

Testosterone levels are expressed in nmol/L.