Table I.
Rates of preterm birth according to maternal characteristics, singleton live births, Québec, 1981–2008a
| Preterm birth (<37 weeks) | |||
|---|---|---|---|
| % (95% CI) | n | Total births N | |
| Language by type of area | |||
| Rest of Québec | |||
| French/English | 5.8 (5.8–5.9) | 115,346 | 1,982,761 |
| Inuit | 12.7 (9.8–15.6) | 65 | 513 |
| First Nations | 6.0 (5.3–6.8) | 231 | 3,836 |
| Inuit–inhabited | |||
| French/English | 12.7 (10.2–15.2) | 86 | 680 |
| Inuit | 9.5 (8.6–10.3) | 459 | 4,851 |
| First Nations–Inhabited | |||
| French/English | 6.7 (6.2–7.3) | 604 | 8,962 |
| First Nations | 5.9 (5.5–6.4) | 694 | 11,678 |
| Age (years) | |||
| <20 | 8.1 (7.9–8.2) | 7,700 | 95,563 |
| 20–34 | 5.6 (5.6–5.7) | 110,915 | 1,965,560 |
| ≥35 | 6.7 (6.6–6.8) | 15,562 | 230,938 |
| Education | |||
| No high school diploma | 7.1 (7.0–7.2) | 24,113 | 338,134 |
| High school diploma | 6.5 (6.4–6.5) | 18,966 | 294,013 |
| Some post–secondary | 5.6 (5.6–5.7) | 33,384 | 592,704 |
| Some university or more | 5.1 (5.0–5.1) | 47,299 | 934,745 |
| Marital status | |||
| Legally married | 5.2 (5.1–5.2) | 66,022 | 1,282,983 |
| Not legally married | 6.8 (6.7–6.8) | 68,155 | 1,009,078 |
| Parity (previous deliveries) | |||
| 0 | 6.6 (6.5–6.6) | 68,283 | 1,043,221 |
| 1 | 5.0 (5.0–5.1) | 40,715 | 808,606 |
| ≥2 | 5.7 (5.7–5.8) | 25,179 | 440,234 |
| Birth yearb | |||
| 1981–1989 | 5.3 (5.3–5.4) | 40,808 | 768,400 |
| 1990–1999 | 6.0 (6.0–6.1) | 51,004 | 846,203 |
| 2000–2008 | 6.3 (6.2–6.3) | 42,365 | 677,458 |
| Total | 5.9 (5.8–5.9) | 134,177 | 2,292,061 |
CI, confidence interval.
a
May not sum to total as “unknown” or “other” language categories are not shown. All χ2 tests for differences in proportions had p<0.0001.
b
Cochran-Armitage test for trend p<0.0001.