Table 1.
Participant intake characteristics (n=3514)
| Category | Maternal (n/%) | Paternal (n/%) |
| Demographics | ||
| Age (years) | ||
| 16–24 | 100 (4.6) | 19 (1.4) |
| 25–29 | 481 (22.0) | 216 (15.4) |
| 30–34 | 980 (44.8%) | 493 (35.2) |
| 35–39 | 512 (23.4) | 329 (23.5) |
| ≥40 | 105 (4.8) | 162 (11.6) |
| Missing age information | 11 (0.5) | 181 (12.9) |
| Marital status | ||
| Married/common-law | 2035 (93.0) | 1275 (91.1) |
| Single/divorced/separated | 97 (4.4) | 27 (1.9) |
| Missing marital information | 57 (2.6) | 98 (7.0) |
| Education | ||
| Less than a high school diploma | 59 (2.7) | 31 (2.2) |
| Completed high school diploma | 202 (9.2) | 147 (10.5) |
| Completed trade, technical | 404 (18.5) | 376 (26.9) |
| Completed university or more | 1442 (66.8) | 746 (53.3) |
| Missing education information | 83 (3.7) | 100 (7.1) |
| Ethnicity | ||
| White | 1693 (77.3) | 1082 (77.3) |
| Non-white | 485 (22.2) | 206 (14.7) |
| Missing ethnic information | 11 (0.5) | 112 (8.0) |
| Mothers’ report on total household income | ||
| <$40 000 | 190 (8.7) | – |
| $40 000–$69 999 | 279 (12.7) | – |
| $70 000–$99 999 | 464 (21.2) | – |
| >$100 000 | 1146 (52.3) | – |
| Missing household income information | 110 (5.0) | – |
| Born in Canada | ||
| Yes | 1618 (73.9) | 1024 (73.1) |
| No | 481 (22.0) | 277 (19.8) |
| Missing country of birth | 90 (4.1) | 99 (7.1) |
| Gravidity | ||
| Multigravida | 1107 (51.6) | n/a |
| Primigravida | 996 (46.4) | n/a |
| Missing gravidity information | 42 (2.0) | n/a |
| Parity | ||
| 0 | 1222 (55.8) | n/a |
| 1 | 732 (33.4) | n/a |
| 2 | 181 (8.3) | n/a |
| ≥3 | 37 (1.7) | n/a |
| Missing parity information | 17 (0.8) | n/a |