Table 1 Maternal, pregnancy and maternity care characteristics of low risk women for elective repeat caesarean section (ERCS)
From: Rate of spontaneous onset of labour before planned repeat caesarean section at term
|  | Spontaneous labour <39 weeks N = 1,473 N (Col.%)a | ERCS ≥39 weeks N = 15,841 N (Col.%)a | P value |
|---|---|---|---|
Maternal and Pregnancy Characteristics | Â | ||
Age (years) | Â | Â | 0.87 |
<20 | 10 (0.7) | 96 (0.6) | Â |
20 - <35 | 922 (62.6) | 10,005 (63.2) | Â |
> = 35 | 541 (36.7) | 5,739 (36.2) |  |
Country of birth | <0.001 | ||
Australian | 1,013 (68.9) | 11,650 (73.7) | Â |
Asian | 258 (17.6) | 1,980 (12.5) | Â |
Other | 199 (13.5) | 2,177 (13.8) | Â |
Socio-economic status | Â | ||
Most disadvantaged | 293 (20.1) | 2,851 (18.2) | 0.24 |
Disadvantaged | 254 (17.5) | 2,763 (17.7) | Â |
Average | 263 (18.1) | 2,734 (17.5) | Â |
Advantaged | 259 (17.8) | 3,082 (19.7) | Â |
Most advantaged | 386 (26.5) | 4,210 (26.9) | Â |
Smoking in pregnancy | 176 (12.0) | 1,385 (8.7) | <0.001 |
No. of previous vaginal births | 0.16 | ||
0 | 1,256 (87.1) | 13,716 (88.8) | Â |
1 | 133 (9.2) | 1,261 (8.2) | Â |
≥2 | 53 (3.7) | 478 (3.1) |  |
No. of previous CS | Â | Â | 0.001 |
1 | 1,013 (70.2) | 11,513 (74.5) | Â |
2 | 358 (24.8) | 3,315 (21.5) | Â |
≥3 | 73 (5.1) | 630 (4.1) |  |
Prior delivery history b | Â | Â | <0.001 |
Spontaneous preterm | 102 ( 6.9) | 300 (1.9) | Â |
Planned preterm | 65 ( 4.4) | 382 (2.4) | Â |
Spontaneous term | 570 (38.7) | 4,685 (29.6) | Â |
Planned term | 512 (34.8) | 8,210 (51.8) | Â |
Unavailable | 224 (15.2) | 2,264 (14.3) | Â |
Vertex Presentation | 1,440 (97.8) | 15,471 (97.7) | 0.82 |
Size at birth | Â | Â | 0.03 |
<10th percentile | 81 (5.5) | 822 (5.2) | Â |
10th - 90th percentile | 1,194 (81.1) | 12,480 (78.8) | Â |
>90th percentile | 197 (13.4) | 2,532 (16.0) | Â |
Maternity Care Characteristics | |||
Care type (private) | 700 (47.5) | 7,624 (48.1) | 0.66 |
Antenatal care (<20w) | 1,390 (94.4) | 14,963 (94.5) | 0.88 |
Birth hospital type | |||
Private | 533 (36.2) | 6,064 (38.3) | 0.19 |
Tertiary | 483 (32.8) | 5,260 (33.2) | Â |
Other (urban) | 225 (15.3) | 2,184 (13.8) | Â |
Other (rural) | 232 (15.8) | 2,333 (14.7) | Â |