Age, yr | 0 | | | | 0.7 |
< 20 | | 598 | 114 | 16.0 | |
20–29 | | 4 935 | 920 | 15.7 | |
30–34 | | 3 059 | 584 | 16.0 | |
≥ 35 | | 1 673 | 340 | 16.9 | |
Body mass index | 2 378 (19.5) | | | | 0.5 |
< 18.5 (underweight) | | 414 | 71 | 14.6 | |
18.5–24.9 (normal) | | 3 964 | 812 | 17.0 | |
25–29.9 (overweight) | | 1 900 | 384 | 16.8 | |
≥ 30 (obese) | | 1 900 | 400 | 17.4 | |
Marital status | 645 (5.3) | | | | 0.003 |
Married or common law | | 6 947 | 1 421 | 17.0 | |
Single, widowed or divorced | | 2 739 | 471 | 14.7 | |
Education level | 6 155 (50.4) | | | | 0.1 |
1–3 (high school or technical college) | | 1 920 | 498 | 20.6 | |
4–7 (postsecondary or higher) | | 2 955 | 695 | 19.0 | |
Location of residence | 0 | | | | 0.02 |
Urban | | 7 417 | 1 362 | 15.5 | |
Rural | | 2 848 | 596 | 17.3 | |
Neighbourhood income | 986 (8.1) | | | | 0.03 |
Lowest quintile (1), (2) | | 3 837 | 686 | 15.2 | |
Highest quintile (3)– (5) | | 5 591 | 1 123 | 16.7 | |
Smoking during pregnancy | 92 (0.8) | | | | < 0.001 |
No | | 7 951 | 1 607 | 16.8 | |
Yes | | 2 228 | 345 | 13.4 | |
Parity | 0 | | | | 0.01 |
0 | | 4 706 | 959 | 16.9 | |
≥ 1 | | 5 559 | 999 | 15.2 | |
Season of delivery | 0 | | | | 0.02 |
November 2010–March 2011 | | 2 868 | 575 | 16.7 | |
April–October 2011 | | 4 532 | 796 | 14.9 | |
November–March 2012 | | 2 865 | 587 | 17.0 | |
Maternal risk status† | 0 | | | | < 0.001 |
Low | | 8 037 | 1 460 | 15.4 | |
High | | 2 228 | 498 | 18.3 | |
Previous pregnancy loss | 124 (1.0) | | | | 0.5 |
No | | 10 017 | 1 923 | 16.1 | |
Yes (≥ 1) | | 137 | 22 | 13.8 | |
≥ 1 child at home aged < 5 yr | 0 | | | | 0.7 |
No | | 6 318 | 1 213 | 16.1 | |
Yes | | 3 947 | 745 | 15.9 | |
Gestational diabetes | 0 | | | | 0.8 |
No | | 9 754 | 1 864 | 16.0 | |
Yes | | 511 | 94 | 15.5 | |
Gestational hypertension | 0 | | | | 0.1 |
No | | 10 110 | 1 938 | 16.1 | |
Yes | | 155 | 20 | 11.4 | |
Pre-existing hypertension | 0 | | | | 0.2 |
No | | 10 151 | 1 943 | 16.1 | |
Yes | | 114 | 15 | 11.6 | |
Any psychiatric condition | 0 | | | | 0.02 |
No | | 9 148 | 1 710 | 15.7 | |
Yes | | 1 117 | 248 | 18.2 | |
No. of fetuses | 0 | | | | 0.7 |
1 | | 10 093 | 1 928 | 16.0 | |
≥ 2 | | 172 | 30 | 14.9 | |
Sex of infant | 0 | | | | 0.7 |
Female | | 5 024 | 968 | 16.2 | |
Male | | 5 241 | 990 | 15.9 | |