Table 2

Mean unadjusted annual percentage changes (95% CI) by gender and age-change categories from baseline to follow-up for bone mineral density (BMD), grip strength, balance and gait velocity
Age change categories from baseline to follow-up
Measurements N 50 to 60 years n 60 to 70 years n 70+years Interaction2
BMD (mg/cm2) Men 44 −0.83 (−1.18, -0.46) 48 −0.75 (−1.05, -0.45) 47 −1.00 (−1.31, -0.69) <0.01
Women 68 −0.71 (−0.98, -0.43) 68 −1.44 (−1.71, -1.18) * 63 −1.48 (−1.80, -1.17) *
P-value1 0.67 <0.001 <0.05
Grip strength (kp/cm2) Men 41 −3.09 (−3.55, -2.64) 49 −2.84 (−3.13, -2.54) 52 −2.75 (−3.21, -2.28) 0.92
Women 67 −2.44 (−2.78, -2.09) 67 −2.49 (−2.88, -2.09) 59 −2.22 (−2.74, -1.70)
P-value1 0.06 0.06 0.38
Balance (sec) Men 43 −0.46 (−0.91, 0.00) 42 −0.95 (−1.48, -0.42) * 37 −2.41 (−3.02, -1.79) *,† 0.30
Women 63 −0.27 (−0.72, 0.18) 65 −1.61 (−2.01, -1.22) * 36 −2.11 (−2.95, -1.27) *
P-value1 0.42 0.12 0.75
Gait velocity (m/sec) Men 44 0.13 (−0.34, 0.60) 49 −0.55 (−1.19, 0.09) ** 50 −1.68 (−2.33, -1.04) *,‡ 0.21
Women 67 −0.19 (−0.70, 0.31) 69 −0.25 (−0.70, 0.19) 63 −2.38 (−3.03, -1.74) *,†
P-value1 0.15 0.84 0.86

1,2 P-values for gender differences for each age change category and the gender-by-age change category interactions were assessed by ANCOVA adjusting for covariates. *p < 0.001 versus 50–60 years; †p < 0.001 versus 60–70 years; ‡p < 0.05 versus 60–70 years; **p < 0.05 versus 50–60 years.

Daly et al.

Daly et al. BMC Geriatrics 2013 13:71   doi:10.1186/1471-2318-13-71

Open Data