Table 1.
Prevalence of ABO and maternal risk factors by socioeconomic quintiles in urban and rural Alberta (2006–2012)
| Maternal area of residence at delivery | Adverse birth outcomes | Maternal risk factors | |||||||
| PTB | SGA | LGA | Weight>91 kg | Gestational hypertension | Gestational diabetes | Smoking | Substance use | ||
| Urban | N | 19 924 | 26 893 | 27 874 | 25 987 | 15 452 | 15 147 | 44 004 | 8634 |
| Overall (% (95% CI)) | 6.8 (6.7 to 6.9) | 9.2 (9.1 to 9.3) | 9.5 (9.4 to 9.6) | 9.0 (8.9 to 9.1) | 5.3 (5.2 to 5.4) | 5.2 (5.1 to 5.3) | 15.2 (15.0 to 15.3) | 3.0 (2.9 to 3.0) | |
| Q1:lowest SES | 7.9 (7.7 to 8.2) | 11.4 (11.1 to 11.7) | 8.6 (8.3 to 8.8) | 9.0 (8.7 to 9.3) | 5.2 (5.0 to 5.4) | 7.2 (7.0 to 7.5) | 20.1 (19.8 to 20.5) | 4.3 (4.1 to 4.4) | |
| Q2 | 7.2 (7.0 to 7.4) | 10 (9.7 to 10.2) | 9.4 (9.1 to 9.6) | 9.9 (9.6 to 10.1) | 5.3 (5.1 to 5.5) | 5.8 (5.6 to 6.0) | 19.1 (18.8 to 19.5) | 3.5 (3.3 to 3.6) | |
| Q3 | 6.9 (6.7 to 7.1) | 9.1 (8.9 to 9.3) | 9.6 (9.3 to 9.8) | 9.5 (9.3 to 9.8) | 5.4 (5.2 to 5.5) | 4.9 (4.7 to 5.1) | 16.6 (16.3 to 16.9) | 3.2 (3.1 to 3.4) | |
| Q4 | 6.5 (6.3 to 6.7) | 8.8 (8.5 to 9.0) | 9.7 (9.5 to 9.9) | 8.8 (8.5 to 9.0) | 5.5 (5.3 to 5.7) | 5.0 (4.8 to 5.1) | 13.4 (13.1 to 13.7) | 2.5 (2.4 to 2.7) | |
| Q5:highest SES | 6.1 (5.9 to 6.3) | 7.9 (7.7 to 8.1) | 10.1 (9.8 to 10.3) | 8.1 (7.9 to 8.2) | 5.2 (5.1 to 5.4) | 4.1 (4.0 to 4.3) | 10.0 (9.8 to 10.2) | 2.0 (1.9 to 2.1) | |
| Rural | N | 2636 | 2616 | 4895 | 4248 | 1790 | 1360 | 9170 | 2112 |
| Overall (% (95% CI)) | 6.8 (6.6 to 7.1) | 6.8 (6.5 to 7.0) | 12.7 (12.3 to 13.0) | 11.2 (10.8 to 11.5) | 4.7 (4.5 to 4.9) | 3.6 (3.4 to 3.8) | 24.1 (23.6 to 24.5) | 5.5 (5.2 to 5.7) | |
| Q1:lowest SES | 8.4 (7.8 to 8.9) | 6.4 (5.9 to 7.0) | 16.1 (15.3 to 16.9) | 13.5 (12.8 to 14.2) | 4.2 (3.8 to 4.7) | 4.5 (4.1 to 5.0) | 45.7 (44.7 to 46.8) | 14.3 (13.6 to 15.0) | |
| Q2 | 6.1 (5.6 to 6.6) | 6.1 (5.6 to 6.6) | 13.0 (12.2 to 13.7) | 11.4 (10.6 to 12.1) | 4.7 (4.2 to 5.2) | 3.1 (2.7 to 3.5) | 19.1 (18.2. 19.9) | 2.9 (2.5 to 3.3) | |
| Q3 | 6.8 (6.1 to 7.4) | 7.2 (6.6 to 7.9) | 11.7 (10.8 to 12.5) | 10.7 (9.9 to 11.5) | 4.7 (4.2 to 5.3) | 3.2 (2.7 to 3.7) | 20.6 (19.6 to 21.7) | 3.8 (3.3 to 4.3) | |
| Q4 | 6.5 (6.0 to 7.0) | 7.2 (6.6 to 7.7) | 11.7 (11.1 to 12.4) | 10.6 (10.0 to 11.3) | 4.5 (4.1 to 4.9) | 3.3 (2.9 to 3.7) | 20.1 (19.2 to 20.9) | 3.2 (2.8 to 3.6) | |
| Q5:highest SES | 6.3 (5.8 to 6.8) | 7.0 (6.4 to 7.6) | 10.5 (9.9 to 11.2) | 9.4 (8.8 to 10.1) | 5.4 (4.9 to 5.9) | 3.5 (3.1 to 3.9) | 12.7 (12.0 to 13.4) | 2.2 (1.9 to 2.5) | |
ABO, adverse birth outcomes; LGA, large for gestational age; n, number of cases; PTB, preterm birth; Q, quintiles; SES, socioeconomic status; SGA, small for gestational age.