Baseline demographics of parents and families enrolled in the Canadian Healthy Infant Longitudinal Development (CHILD) Study by site
| Family demographics | ||
| Mean gestational age in weeks at enrolment (SD) | 26.7 (6.3) | |
| Older siblings in the home (%) | 48.3 | |
| Parental demographics | Maternal | Paternal |
| Mean age in years (SD) | 32.3 (4.7) | 33.8 (5.6) |
| Reported ethnicity | ||
| White Caucasian | 2532 (72.9) | 2536 (73.7) |
| South East Asian | 428 (12.3) | 343 (10.0) |
| South Asian | 91 (2.6) | 106 (3.1) |
| First Nations | 177 (5.1) | 145 (4.2) |
| Black | 77 (2.2) | 110 (3.2) |
| Other | 161 (4.6) | 174 (5.1) |
| Unknown* | 6 (0.2) | 29 (0.8) |
| Education | ||
| High school or less | 295 (8.7) | 502 (14.7) |
| College or university | 2443 (72.2) | 2151 (63.1) |
| Postgraduate education | 647 (19.1) | 756 (22.2) |
| Health status | ||
| Reported asthma | 760/3424 (22.2) | 547/3000 (18.2) |
| Any reported allergy | 2832/3425 (82.7) | 2094/3000 (69.7) |
| Atopic by skin testing | 1768/3073 (57.5) | 1657/2432 (68.1)† |
| Gestational diabetes | 115/3475 (3.3) | N/A |
Data are presented as n (%) or as n/N (%) with N being the total sample available for that variable. Sample sizes differ for some characteristics due to differences in missing values.
*Those responding that they did not know their ethnicity are classified as ‘Unknown’.
†Skin test data apply only to participating fathers.