| Years | |||||
---|---|---|---|---|---|---|
Variable | 2010 | 2011 | 2012 | 2013 | 2014 | All years |
(N = 4,169) | (N = 4,608) | (N = 4,968) | (N = 4,952) | (N = 5,474) | (N = 24,171) | |
n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |
Maternal Age group (years)b | ||||||
 <20 | 548 (13.1) | 698 (15.1) | 779 (19.4) | 709 (14.3) | 717 (13.1) | 3,451 (14.2) |
 20–34 | 3,322 (79.7) | 3,451 (69.9) | 3,768 (70.1) | 3,806 (76.9) | 4,210 (76.9) | 18,557 (76.7) |
 35+ | 311(7.5) | 459 (11.9) | 421 (10.5) | 438 (8.8) | 567 (10.4) | 2,196 (9.1) |
Type of deliveryc | ||||||
 SVDa | 3,631(87.2) | 3,942 (85.5) | 4,428 (89.1) | 4,060 (82.0) | 4,414 (80.6) | 20,475 (84.7) |
 Caesarean section | 519 (12.5) | 637(13.8) | 500 (10.1) | 845 (17.1) | 1,011(18.5) | 3,512 (14.5) |
 Vacuum extraction | 16 (0.4) | 29 (0.6) | 40 (0.8) | 47 (0.9) | 49 (0.9) | 181 (0.7) |
Sex of live babies | ||||||
 Male | 1,990 (47.9) | 2,448 (52.3) | 2,484 (50.7) | 2,586 (52.2) | 2,745 (50.2) | 12,253 (50.8) |
 Female | 2,167 (52.1) | 2,217 (47.7) | 2,412 (49.3) | 2,369 (47.8) | 2,725 (49.8) | 11,890 (49.2) |
Multiplicity of births | ||||||
 Singleton (1) | 4,063 (97.7) | 4,533 (97.2) | 4,797 (98.0) | 4,853 (97.9) | 5,352 (97.8) | 23,626 (97.7) |
 Multiple (2 or 3) | 94 (2.3) | 132 (2.8) | 99 (2.0) | 102 (2.1) | 118 (2.2) | 545 (2.3) |