TABLE I.
Characteristics of participating children
| Number (percent) |
Children with assessment of allergen sensitization† |
||
|---|---|---|---|
| Variable | At baseline† | At 7 years of follow-up† | |
| Female sex | 230 (46.2) | 200 (45.5) | 116 (42.8) |
| Household income < $30,000 | 45 (9.3) | 27 (6.3)* | 13 (4.9)* |
| Ethnicity | |||
| White | 375 (75.3) | 351 (79.8)* | 219 (80.8)* |
| Black | 60 (12.1) | 36 (8.2)* | 23 (8.5)* |
| Hispanic | 28 (5.6) | 21 (4.8) | 11 (4.1) |
| Asian and other | 35 (7.0) | 32 (7.2) | 18 (6.6) |
| Day care attendance in the first year of life | 238 (47.8) | 208 (47.3) | 140 (51.7) |
| Maternal history of asthma | 152 (30.5) | 130 (29.6) | 76 (28.0) |
| Paternal history of asthma | 116 (23.7) | 100 (23.2) | 61 (22.8) |
| Der p or Der f (highest), baby’s bed (μg/g) | |||
| <0.05 | 223 (44.9) | 198 (45.1) | 123 (45.4) |
| ≥0.05 to <2 | 159 (32.0) | 135 (30.7) | 79 (29.2) |
| ≥2 to <10 | 68 (13.7) | 64 (14.6) | 43 (15.9) |
| ≥10 | 47 (9.4) | 42 (9.6) | 25 (9.2) |
| Quartiles of endotoxin, family room (EU/mg) | |||
| 2.14-52.48 | 100 (24.9) | 83 (23.5) | 50 (22.6) |
| 52.49-79.99 | 100 (24.9) | 90 (25.5) | 53 (24.0) |
| 80.48-125.59 | 101 (25.2) | 92 (26.1) | 60 (27.2) |
| 125.6-713.20 | 100 (24.9) | 88 (24.9) | 58 (26.2) |
*
P < .05 for comparison with children at baseline.
†
Numbers and percentages reflect missing information on some variables.