Table 1. Characteristics of CAPS subjects assessed at 8 years and of the original cohort recruited antenatally.
| Mean ± SD or n (%) | Mean ± SD or n (%) | ||
| Subjects remaining at 8 yrs | Birth Cohort | ||
| N = 450 | N = 616 | ||
| Breastfeeding | |||
| At least 3 months full breastfeeding | 144 (33.9) | 170 (30.6) | |
| Any breastfeeding for at least one month | 313 (69.6) | 389 (67.1) | |
| Breastfeeding duration in months | |||
| <1 | 137 (30.4) | 191 (32.9) | |
| ≥1 to <7 | 149 (33.1) | 191 (32.9) | |
| ≥7 to <13 | 78 (17.3) | 94 (16.2) | |
| ≥13 | 86 (19.1) | 104 (17.9) | |
| Sex (male) | 228 (50.7) | 312 (50.7) | |
| Gestational age (wks) | 39.58±1.26 | 39.56±1.26 | |
| Birth weight (kg) | 3.50±0.49 | 3.49±0.49 | |
| Mother's age at child's birth (yrs) | 29.52±5.08 | 28.97±5.28 | |
| Number of Older Siblings | |||
| 0 | 151 (33.6) | 199 (32.6) | |
| 1 | 156 (34.7) | 214 (35) | |
| 2 | 89 (19.8) | 129 (21.1) | |
| ≥3 | 53 (11.8) | 69 (11.3) | |
| Maternal Asthma | 242 (53.8) | 347 (56.3) | |
| Mother smoked in pregnancy | 106 (23.6) | 150 (24.4) | |
| ETS in home at age 1 (more than one cigarette smoked/day) | 125 (27.8) | 165 (29.5) | |
| Mother's education | |||
| University/TAFE | 223 (49.6) | 276 (44.8) | |
| Year 12 | 78 (17.3) | 110 (17.9) | |
| Year 10 | 133 (29.6) | 207 (33.6) | |
| ≤Year 9 | 16 (3.6) | 23 (3.7) | |
| Covariates at age 8 | |||
| ETS in home at 7.5 yrs | 80 (18.4) | ||
| Current asthma at 8 yrs | 98 (21.8) | ||
| Rhinitis (without cold) 8 yrs | 121 (27.0) | ||
| BMI at 8 yrs kg/m2 | 17.49±2.98 | ||
| Atopy at 8 yrs (positive to any SPT) | 181 (45.0)a | ||
a Not all children agreed to undergo a skin prick test, n = 402.