Table 6.
Odds ratios and 95 % confidence intervals for high %BF† from the adjusted logistic regression analyses in 18-year-old men and women, Johannesburg–Soweto, South Africa, Birth to Twenty Plus (Bt20+) cohort
| Step 1 | Step 2 | ||||
|---|---|---|---|---|---|
| n | Adjusted OR‡ | 95 % CI | Adjusted OR‡ | 95 % CI | |
| Men (n 290) | |||||
| Intrinsic factors | |||||
| Height | 290 | 1·03 | 0·97, 1·09 | 1·02 | 0·96, 1·08 |
| Population group (black African§) | 249 | ||||
| White | 18 | ||||
| Mixed ancestry | 23 | 5·13*** | 2·02, 13·0 | 3·49* | 1·29, 9·43 |
| Household socio-economic factors | |||||
| Household wealth index (3rd tertile (high)§) | 90 | ||||
| 1st tertile | 96 | 0·28* | 0·10, 0·78 | ||
| 2nd tertile | 104 | 0·52 | 0·22, 1·21 | ||
| Cox/Snell and Nagelkerke R 2 estimates | 0·043, 0·080 | 0·065, 0·121 | |||
| Deviance | 200·6 | 194·2 | |||
| Women (n 692) | |||||
| Intrinsic factors | |||||
| Height | 692 | 0·96** | 0·93, 0·99 | 0·96** | 0·93, 0·99 |
| Age of entry into menarche (<13 years§) | 309 | ||||
| ≥13 years | 383 | 0·64** | 0·45, 0·89 | 0·65** | 0·46, 0·92 |
| Neighbourhood socio-economic factors | |||||
| Neighbourhood social support index (3rd tertile (favourable)§) | 213 | ||||
| 1st tertile | 259 | 1·20 | 0·79, 1·84 | ||
| 2nd tertile | 220 | 1·59* | 1·03, 2·44 | ||
| Cox/Snell and Nagelkerke R 2 estimates | 0·024, 0·035 | 0·031, 0·044 | |||
| Deviance | 799·70 | 795·03 | |||
%BF, percentage body fat.
(*) P<0·10, *P<0·05, **P<0·01, ***P<0·001.
†
High %BF was defined as fat mass ≥85·01th percentile( 49 ).
‡
OR adjusted by logistic regression.
§
Reference category.