Table 1.
Maternal, pregnancy and maternity care characteristics of low risk women for elective repeat caesarean section (ERCS)
| 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 |
|
||
|
Age (years) |
|
|
0.87 |
| <20 |
10 (0.7) |
96 (0.6) |
|
| 20 - <35 |
922 (62.6) |
10,005 (63.2) |
|
| > = 35 |
541 (36.7) |
5,739 (36.2) |
|
|
Country of birth |
<0.001 |
||
| Australian |
1,013 (68.9) |
11,650 (73.7) |
|
| Asian |
258 (17.6) |
1,980 (12.5) |
|
| Other |
199 (13.5) |
2,177 (13.8) |
|
|
Socio-economic status |
|
||
| Most disadvantaged |
293 (20.1) |
2,851 (18.2) |
0.24 |
| Disadvantaged |
254 (17.5) |
2,763 (17.7) |
|
| Average |
263 (18.1) |
2,734 (17.5) |
|
| Advantaged |
259 (17.8) |
3,082 (19.7) |
|
| Most advantaged |
386 (26.5) |
4,210 (26.9) |
|
|
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) |
|
| 1 |
133 (9.2) |
1,261 (8.2) |
|
| ≥2 |
53 (3.7) |
478 (3.1) |
|
|
No. of previous CS |
|
|
0.001 |
| 1 |
1,013 (70.2) |
11,513 (74.5) |
|
| 2 |
358 (24.8) |
3,315 (21.5) |
|
| ≥3 |
73 (5.1) |
630 (4.1) |
|
|
Prior delivery history
b
|
|
|
<0.001 |
| Spontaneous preterm |
102 ( 6.9) |
300 (1.9) |
|
| Planned preterm |
65 ( 4.4) |
382 (2.4) |
|
| Spontaneous term |
570 (38.7) |
4,685 (29.6) |
|
| Planned term |
512 (34.8) |
8,210 (51.8) |
|
| Unavailable |
224 (15.2) |
2,264 (14.3) |
|
|
Vertex Presentation |
1,440 (97.8) |
15,471 (97.7) |
0.82 |
|
Size at birth |
|
|
0.03 |
| <10th percentile |
81 (5.5) |
822 (5.2) |
|
| 10th - 90th percentile |
1,194 (81.1) |
12,480 (78.8) |
|
| >90th percentile |
197 (13.4) |
2,532 (16.0) |
|
|
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) |
|
| Other (urban) |
225 (15.3) |
2,184 (13.8) |
|
| Other (rural) | 232 (15.8) | 2,333 (14.7) | |
aPercentages may not add to 100 because of missing data.
bIncorporates spontaneous onset of labour or planned delivery (by labour induction or prelabour caesarean section) for the lowest gestation of all prior births.