Table 1.
Demographic characteristics and complications prior to labour by planned place of birth
| Hospital n = 242 936 | Birth centre n = 14 483 | Home n = 742 | P | |
|---|---|---|---|---|
| Maternal age (years) |
|
|
|
|
| Mean (SD) # |
29.2 (5.67) |
30.0 (5.29) |
32.4 (5.23) |
<0.001 |
| <20 |
15 280 (6.3%) |
513 (3.5%) |
7 (0.9%) |
|
| 20-24 |
42 544 (17.5%) |
2 122 (14.7%) |
54 (7.3%) |
|
| 25-29 |
73 440 (30.2%) |
4 529 (31.3%) |
159 (21.4%) |
<0.001 |
| 30-34 |
73 404 (30.2%) |
4 788 (33.1%) |
249 (33.6%) |
|
| 35-39 |
32 058 (13.2%) |
2 181 (15.1%) |
185 (24.9%) |
|
| ≥40 |
6 134 (2.5%) |
349 (2.4%) |
49 (6.6%) |
|
| Missing |
76 (0.03%) |
1 (0.09%) |
39 (5.3%) |
|
| Previous pregnancies (≥20 weeks) |
|
|
|
|
| 0 |
149 459 (61.5%) |
9 145 (63.1%) |
313 (42.2%) |
|
| 1 |
54 445 (22.4%) |
3 328 (23.0%) |
219 (29.5%) |
<0.001 |
| 2 |
24 627 (10.1%) |
1 453 (10.0%) |
143 (19.3%) |
|
| ≥3 |
14 259 (5.9%) |
552 (3.8%) |
59 (8.0) |
|
| Missing |
146 (0.06%) |
5 (0.04%) |
8 (1.1%) |
|
| Gestation (completed weeks) |
|
|
|
|
| Mean (SD) # |
39.5 (1.10) |
39.8 (1.12) |
39.9 (1.16) |
<0.001 |
| 37 |
12441 (5.1%) |
541 (3.7%) |
22 (3.0%) |
<0.001 |
| 38 |
31268 (12.9%) |
1424 (9.8%) |
55 (7.4%) |
|
| 39 |
62137 (25.6%) |
3405 (23.5%) |
147 (19.8%) |
|
| 40 |
95992 (39.5%) |
5353 (37.0%) |
309 (41.6%) |
|
| 41 |
37682 (15.5%) |
3347 (23.1%) |
147 (19.8%) |
|
| ≥42 |
3416 (1.4%) |
413 (2.9%) |
62 (8.4%) |
|
| Complication conditions prior to labour |
|
|
|
|
| Prolonged rupture of membranes* |
72 (0.03%) |
0 |
0 |
0.11 |
| Preeclampsia |
2579 (1.1%) |
93 (0.6%) |
1 (0.1%) |
<0.001 |
| Gestational hypertension |
6997 (2.9%) |
322 (2.2%) |
1 (0.1%) |
<0.001 |
| Chronic hypertension |
685 (0.3%) |
29 (0.2%) |
2 (0.3%) |
0.38 |
| Antepartum haemorrhage |
1293 (0.5%) |
64 (0.4%) |
3 (0.4%) |
0.49 |
| Eclampsia |
11 (<0.01%) |
0 |
0 |
0.85 |
| Gestational diabetes** |
32 (0.01%) |
0 |
2 (0.3%) |
0.36 |
| Pre-pregnancy diabetes (Type I) |
149 (0.06%) |
0 |
0 |
0.03 |
| Complications per woman |
|
|
|
|
| 0 |
221284 (91.1%) |
13725 (94.8%) |
735 (99.1%) |
|
| 1 |
18460 (7.6%) |
637 (4.4%) |
6 (0.8%) |
<0.001 |
| ≥2 | 3192 (1.3%) | 121 (0.8%) | 1 (0.1%) |
#Utilising ANOVA.
*Prolonged rupture of membranes: >24 hours.
**Any form of GDM.