Table 5.
Associations between ordinal MWS body size variables at various ages and corresponding NSHD anthropometry
| Spearman | P | |||
|---|---|---|---|---|
| MWS variable and age | NSHD variable (units) and age | N | r* | (trend)† |
| Relative body size at age 10 | Body mass index (kg/m2) at age 11 | 306 | 0.51 | <0.001 |
| Clothes size at age 20 | Body mass index (kg/m2) at age 20 | 302 | 0.63 | <0.001 |
| Clothes size at resurvey | Body mass index (kg/m2) at age 53 | 316 | 0.79 | <0.001 |
| Clothes size at resurvey | Waist circumference (cm) at age 53 | 316 | 0.79 | <0.001 |
| Bra band size at resurvey | Chest circumference (cm) at age 53 | 291 | 0.73 | <0.001 |
MWS: Million Women Study. NSHD: National Survey of Health and Development. N: numbers of women with non-missing values for both the MWS and NSHD variables.
* Spearman rank correlation coefficient for the strength of a monotonic relationship between the ordinal MWS variable and the continuous NSHD variable.
† P-values for overall significance of linear regressions of continuous NSHD values against ordinal MWS values.