Table 1 Characteristics of study population

Age (yr)

27 ± 5 (53)

68 ± 7 (39)

<0.001

Height (cm)

175 ± 7 (53)

175 ± 7 (39)

0.9683

Weight (kg)

74.9 ± 10.0 (53)

84.3 ± 13.1 (39)

0.0003

Body mass index (%)

24 ± 3 (53)

27 ± 4 (39)

<0.001

Serum total testosterone (ng/dl)

586 ± 190 (53)

339 ± 95 (39)

<0.001

Population Houston, TX

N/A

358 ± 86 (20)

N/A

Population Boston, MA

586 ± 190 (53)

320 ± 103 (19)

N/A

Lean Body Mass (mg/cm ² )

57336 ± 7209 (52)

58545 ± 7033 (39)

0.4245