Table 1.

Subject characteristics

VariableYoung (n = 42)Older (n = 46)P Value
Age, yr23±1 (18–30)71±1 (65–89)<0.001
Height, m1.73±0.02 (1.55–1.99)1.69±0.01 (1.56–1.89)0.13
Weight, kg68.1±1.9 (48–104)69.2±1.8 (46–99)0.68
Ad, m21.80±0.03 (1.48–2.34)1.79±0.03 (1.43–2.22)0.76
Ad/mass, cm2·kg−1·10−22.68±0.03 (2.24–3.06)2.62±0.03 (2.24–3.13)0.23
Fat, %23.0±1.3 (9.5–37.7)26.9±1.0 (13.8–43.8)0.02
Skinfolds, mm124±7 (42–209)124±4 (69–199)0.99
ASMM, kg/m27.19±0.21 (5.00–9.48)6.90±0.17 (5.05–9.36)0.68
T3, ng/dl121±6 (74–166)112±3 (83–149)0.10
T4, μg/dl6.9±0.3 (4.7–10.3)6.5±0.3 (2.3–13.7)0.47
  • Values are means ± SE (range in parentheses); N, no. of subjects. Ad, body surface area; Ad/mass, body surface area-to-mass ratio; skinfolds, sum of 7 skinfolds; ASMM, appendicular skeletal muscle mass; T3, triiodothyronine; T4, thyroxine.