Table 3 Demographic characteristics by parity
Nulliparous women | Hospital n = 209,664 (%) | Birth Centre n = 12,782 (%) | Home n = 546 (%) |
Maternal age (Years) Mean (SD) | 27.5 (5.3) | 28.34 (5.1) | 29.8 (4.9) |
 < 20 | 17,018 (8.1) | 645 (5.0) | 14 (2.6) |
 20–24 | 45,614 (21.8) | 2326 (18.2) | 67 (12.3) |
 25–29 | 68,568 (32.7) | 4351 (34.0) | 177 (32.4) |
 30–34 | 57,497 (27.4) | 3897 (30.5) | 192 (35.2) |
 35–39 | 19,674 (9.4) | 1485 (11.6) | 89 (16.3) |
 40 | 1293 (0.6) | 78 (0.6) | 7 (1.3) |
Previous pregnancies (≥20 weeks) | |||
 0 | 209,664 (94.0) | 12,782 (5.8) | 546 (0.24) |
Gestation (completed weeks) Mean (SD) | 39.5 (1.06) | 39.6 (1.07) | 39.7 (1.1) |
37 | 10,368 (4.9) | 517 (4.0) | 31 (5.7) |
38 | 26,801 (12.8) | 1405 (11.0) | 51 (9.3) |
39 | 56,144 (26.8) | 3240 (25.4) | 105 (19.2) |
40 | 83,536 (39.8) | 4768 (37.3) | 229 (41.9) |
41 | 32,815 (15.7) | 2852 (23.1) | 130 (23.8) |
Multiparous women | Hospital n = 254,966 (%) | Birth Centre n = 17,151 (%) | Home n = 1278 (%) |
Maternal age (Years) Mean (SD) | 30.5 (5.0) | 30.7 (4.8) | 32.46 (4.3) |
 < 20 | 3715 (1.5) | 121 (0.7) | 3 (0.2) |
 20–24 | 35,569 (14.0) | 1861 (10.9) | 51 (4.0) |
 25–29 | 73,593 (28.9) | 4753 (27.7) | 262 (20.5) |
 30–34 | 90,026 (35.3) | 6376 (37.2) | 508 (39.7) |
 35–39 | 48,420 (19.0) | 3767 (22.0) | 415 (32.5) |
 40 | 3643 (1.4) | 273 (1.6) | 39 (3.1) |
Previous pregnancies (≥20 weeks) | |||
 1 | 150,364 (59.0) | 10,727 (62.5) | 662 (51.8) |
 2 | 65,633 (25.7) | 4460 (26.0) | 373 (29.2) |
 ≥ 3 | 38,969 (15.3) | 1964 (11.5) | 243 (19.0) |
Gestation (completed weeks) Mean (SD) | 39.4 (1.03) | 39.6 (1.02) | 39.8 (0.98) |
 37 | 12,150 (4.8) | 558 (3.3) | 35 (2.7) |
 38 | 35,365 (13.9) | 1828 (10.7) | 112 (8.8) |
 39 | 72,906 (28.6) | 4687 (27.3) | 265 (20.7) |
 40 | 101,639 (39.9) | 6789 (39.6) | 592 (46.3) |
 41 | 32,906 (12.9) | 3289 (19.2) | 274 (21.4) |