Table 1

Baseline and follow-up characteristics of the male and female study participants by birth year at baseline
Born 1948 Born 1938 Born 1918 to 28
Baseline Follow-up Baseline Follow-up Baseline Follow-up
Men, n 46 51 55
 Age (years) 50.8 ± 0.3 60.2 ± 0.4 60.6 ± 0.4 70.3 ± 0.4 72.1 ± 3.7 81.8 ± 3.7
 Height (cm) 177.8 ± 6.1 177.6 ± 6.1 173.5 ± 5.6 173.6 ± 5.8 173.0 ± 5.8 172.8 ± 5.9
 Weight (kg) 79.7 ± 11.8 81.1 ± 13.4 78.8 ± 10.8 79.7 ± 10.7 77.3 ± 10.6 75.1 ± 11.7**
 Smoking, former/current (%) 20/24 28/15 29/35 48/22* 38/18 49/11
 Alcohol, g/week 74 ± 56 81 ± 49 72 ± 54 78 ± 68 73 ± 57 76 ± 61
 History of disease/medication use (%) 10.9 21.7 17.6 37.3** 29.1 54.5***
 Self-reported disability (%) 2.2 2.2 7.8 5.9 5.5 18.2*
 Habitual physical activity (% inactive) 50.0 65.2 47.1 51.0 50.9 67.3
 Forearm BMD (mg/cm2) 671 ± 69 619 ± 95*** 645 ± 82 595 ± 84*** 609 ± 96 547 ± 101***
 Grip strength (kp/cm2) 1.28 ± 0.21 0.90 ± 0.20*** 1.19 ± 0.27 0.86 ± 0.22*** 0.94 ± 0.26 0.68 ± 0.23***
 Balance (seconds) 149 ± 19 143 ± 27 134 ± 22 122 ± 29** 126 ± 26 95 ± 27***
 Gait velocity (m/s) 2.03 ± 0.33 2.05 ± 0.30 1.78 ± 0.30 1.69 ± 0.33 1.71 ± 0.29 1.49 ± 0.38***
Women, n 70 70 66
 Age (years) 51.0 ± 0.5 60.3 ± 0.4 60.7 ± 0.4 70.3 ± 0.4 72.1 ± 3.6 81.9 ± 3.6
 Height (cm) 163.8 ± 5.8 163.8 ± 5.6 161.8 ± 6.7 162.2 ± 6.6 161.3 ± 5.0 161.1 ± 5.0
 Weight (kg) 66.8 ± 10.3 69.8 ± 11.1*** 70.1 ± 13.3 71.8 ± 15.5* 70.6 ± 13.6 67.6 ± 12.4***
 Age at menarche (years) 13.6 ± 1.4 - 14.2 ± 1.5 - 14.1 ± 1.4 -
 Menopause, n (%) 42.9 100 100 100 100 100
 Age at menopause (years) 46.3 ± 3.6 52.6 ± 1.9 50.3 ± 3.5 - 48.5 ± 4.7 -
 Years postmenopausal 4.7 ± 3.4 10.6 ± 4.0 10.4 ± 3.5 20.0 ± 3.5 23.6 ± 6.1 33.4 ± 6.1
 Hormone therapy: former/current (%) 20.3 47.8*** 11.4 24.3* 7.7 10.9
 Smoking, former/current (%) 13/36 23/27* 14/16 19/16 11/5 11/5
 Alcohol, g/week 43 ± 63 49 ± 48 44 ± 28 38 ± 18 57 ± 40 52 ± 44
 History of disease/medication use (%) 17.1 34.3*** 30.0 45.7** 43.1 66.7***
 Self-reported disability (%) 8.6 7.1 4.3 4.3 15.2 25.8
 Habitual physical activity (% inactive) 85.7 78.6 82.9 68.6* 84.8 83.3
 Forearm BMD (mg/cm2) 527 ± 55 492 ± 77*** 477 ± 61 409 ± 66*** 418 ± 81 355 ± 79***
 Grip strength (kp/cm2) 0.88 ± 0.23 0.67 ± 0.17*** 0.79 ± 0.20 0.59 ± 0.15*** 0.62 ± 0.12 0.47 ± 0.13***
 Balance (seconds) 140 ± 20 136 ± 26 127 ± 18 107 ± 22*** 113 ± 26 88 ± 28***
 Gait velocity (m/s) 1.65 ± 0.32 1.64 ± 0.37 1.56 ± 0.27 1.55 ± 0.37 1.43 ± 0.24 1.18 ± 0.38***

Data are presented as means ± SD or as proportions (%); *p < 0.05, **p < 0.01, ***p < 0.001 versus baseline.

Daly et al.

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

Open Data