TABLE 3.
DEMOGRAPHIC CHARACTERISTICS AND DISTRIBUTION OF OTHER COVARIATES
| Characteristic | ||
|---|---|---|
| Total mothers (No., %) | 557 | 100 |
| Mother's age in years at child's birth (median, range) | 23 | 13–42 |
| Race or ethnicity of mother (No., %) | ||
| Hispanic of any race | 107 | 19 |
| Black alone | 390 | 71 |
| White alone | 22 | 4 |
| More than one race | 20 | 4 |
| All others | 11 | 2 |
| Missing | 7 | — |
| Household income < $15,000 per year (No., %) | 355 | 69 |
| Mother's education (No., %) | ||
| <High school | 231 | 42 |
| High school or GED | 183 | 33 |
| >High school | 136 | 25 |
| Smoked during pregnancy (No., %) | 97 | 18 |
| Maternal asthma (No., %) | 307 | 55 |
| Inhaled corticosteroid use during pregnancy (No., %) | 54 | 10 |
| Total babies (No., %) | 560 | 100 |
| Sex (No., %) | ||
| Male | 288 | 51 |
| Female | 272 | 49 |
| Firstborn (No., %) | 221 | 39 |
| Season of birth (No., %) | ||
| January-March | 142 | 25 |
| April-June | 139 | 25 |
| July-September | 160 | 29 |
| October-December | 121 | 22 |
| Birthweight, g (median, range) | 3,220 | 1,815–4,850 |
| Gestational age, wk (median, range) | 39 | 34–42 |