Table 4.
Eczema prevalence stratified by family structure variables
| Variable | Subgroup | Freq* | %** | 95% Confidence Interval |
p-value† |
|---|---|---|---|---|---|
| Number of children in household |
1 child | 4149 | 11.82 | (11.30, 12.35) | 0.0039 |
| 2 children | 3700 | 10.75 | (10.25, 11.24) | ||
| 3 children | 1382 | 10.07 | (9.29, 10.86) | ||
| 4 or more children | 521 | 9.78 | (8.52, 11.04) | ||
|
| |||||
| Birth order in families with 2 or more children |
Oldest child | 2182 | 9.72 | (9.10, 10.33) | 0.1098 |
| 2nd oldest child | 2590 | 10.97 | (10.34, 11.59) | ||
| 3rd oldest child | 640 | 10.07 | (8.88, 11.26) | ||
| 4th oldest child | 191 | 11.14 | (8.75, 13.52) | ||
|
| |||||
| Family structure | Two parent biological/adopted | 6378 | 10.68 | (10.26, 11.10) | 0.0013 |
| Two parent stepfamily | 680 | 9.97 | (8.70, 11.23) | ||
| Single mother/no father present | 2179 | 11.42 | (10.65, 12.20) | ||
| Other | 296 | 7.68 | (6.14, 9.22) | ||
*
Raw frequency of surveyed subjects with eczema
**
Weighted percent of subgroup population with eczema
†
Rao-Scott chi-square test for equal proportions