Table 2 Maternal and infant characteristics of all births, by intrapartum intervention
Method of Birth | Epidural Analgesia | Synthetic oxytocin infusion | |||||
|---|---|---|---|---|---|---|---|
Vaginal birth (n = 408,383) | Pre-labour CS (n = 114,251) | In-labour CS (n = 76,516) | No (n = 442,796) | Yes (n = 156,395) | No (n = 413,563) | Yes (n = 185,628) | |
Parity | |||||||
Primiparous | 180,921 (44.3) | 31,813 (27.8) | 56,259 (73.5) | 160,620 (36.3) | 108,398 (69.3) | 147,368 (35.6) | 121,650 (64.4) |
Multiparous | 227,433 (55.7) | 82,431 (72.2) | 20,252 (26.5) | 282,143 (69.7) | 47,989 (30.7) | 266,170 (65.5) | 63,962 (34.5) |
Admission Type | |||||||
Public | 317,464 (77.7) | 71,240 (62.4) | 56,030 (73.2) | 339,853 (76.8) | 104,889 (67.1) | 308,281 (74.5) | 136,461 (73.5) |
Private | 90,919 (22.3) | 43,011 (37.6) | 20,486 (26.8) | 102,943 (23.2) | 51,506 (32.9) | 105,282(25.5) | 49,167 (26.5) |
Maternal age (years), mean (SD) | |||||||
30.41 (5.18) | 32.99 (4.96) | 30.78 (5.08) | 31.10 (5.28) | 30.54 (5.05) | 31.15 (5.24) | 30.51 (5.16) | |
Maternal BMI, mean (SD) | |||||||
25.31 (23.45) | 27.23 (31.24) | 26.49 (6.08) | 25.82 (22.67) | 25.84 (26.73) | 25.73 (28.32) | 26.06 (5.99) | |
Marital Status | |||||||
Married | 284,337 (66.9) | 87,479 (77.3) | 52,897 (70.0) | 315,540 (72.2) | 109,205 (70.7) | 296,453 (72.6) | 128,292 (70.0) |
De Facto | 71,668 (17.8) | 17,144 (15.2) | 13,938 (18.5) | 74,858 (17.1) | 27,900 (18.1) | 69,219 (17.0) | 33,539 (18.3) |
Single | 46,784 (11.6) | 8479 (7.5) | 8690 (11.5) | 46,560 (10.7) | 17,384 (11.3) | 42,528 (10.4) | 21,416 (11.7) |
Gestation (completed weeks), mean (SD) | |||||||
39.27 (1.15) | 38.49 (0.94) | 39.43 (1.25) | 39.06 (1.15) | 39.37 (1.19) | 39.08 (1.13) | 39.30 (1.26) | |
Birth Weight (grams), mean (SD) | |||||||
3450 (488) | 3413 (507) | 3510 (515) | 3443 (498) | 3474 (489) | 3455 (492) | 3442 (505) | |
SEIFA quintile | |||||||
1 more disadvantaged | 77,744 (20.3) | 17,496 (16.3) | 14,111 (19.7) | 85,568 (20.6) | 23,788 (16.2) | 76,129 (19.7) | 33,227 (19.0) |
2 | 76,561 (20.0) | 20,073 (18.7) | 14,673 (20.5) | 83,648 (20.2) | 27,665 (18.8) | 76,731 (19.8) | 34,582 (19.8) |
3 | 76,745 (20.1) | 21,636 (20.1) | 14,667 (20.5) | 83,361 (20.1) | 29,694 (20.2) | 77,844 (20.1) | 35,211 (20.1) |
4 | 75,861 (19.8) | 23,237 (21.6) | 14,451 (20.2) | 81,971 (19.8) | 31,587 (21.5) | 77,824 (20.1) | 35,734 (20.4) |
5 least disadvantaged | 75,829 (19.8) | 25,101 (23.3) | 13,742 (19.2) | 80,173 (19.3) | 34,512 (23.4) | 78,548 (20.3) | 36,137 (20.7) |
Smoking status during pregnancy | |||||||
Yes | 37,890 (9.6)a | 8345 (7.7) | 6790 (9.3)a | 39,256 (9.2)b | 13,773 (9.3)b | 36,008 (9.1) | 17,021 (9.5) |