Table 2.
Characteristics of the study participants subjected to bone mass measurements in three cohorts of women measured in 1970-74, 1987-93 and 1998-99.a
| Characteristic | Cohort 1970-74 |
Cohort 1987-93 |
Cohort 1998-99 |
P- valuec |
|---|---|---|---|---|
| n = 106 | n = 175 | n = 178 | ||
| Age (yr) | 67 (9.5) | 68 (10.8) | 65 (12.2) | 0.01 |
| Height (cm) | 163 (6.0) | 162 (5.8) | 162 (6.9) | 0.97 |
| Weight (kg) | 67 (11.0) | 66 (12.2) | 69 (12.5) | 0.08 |
| Body-mass indexb | 25 (3.9) | 25 (4.4) | 26 (4.7) | 0.08 |
a Values are means(SD).
b The body-mass index is the weight in kilograms divided by the square of the height in metres.
c Comparing all three cohorts by analysis of variance.