Table 1 Participant characteristics
| Â | Sample | N (%) | Min, Max | Mean (SD) |
|---|---|---|---|---|
Demography | ||||
 Maternal age (years) | 522 |  | 14, 44 | 29.10 (5.56) |
 Body Mass Index (BMI) at antenatal ‘booking-in’ visit | 514 |  | 15, 47 | 24.25 (5.42) |
 Birth weight, g | 505 |  | 1690, 4820 | 3487 (473) |
   < 2500 |  | 5 (1) |  |  |
  2500–3999 |  | 439 (84.1) |  |  |
   > 4000 |  | 61 (11.7) |  |  |
 Baby’s gestation at birth | 521 |  | 33.6, 42.3 | 39.6 (1.4) |
  - < 32 weeks |  | 0 (0) |  |  |
  - 32–36 weeks |  | 20 (3.8) |  |  |
  - ≥ 37 weeks |  | 501 (96.2) |  |  |
 Marital Status | 522 |  |  |  |
  - Married/defacto |  | 446 (85.4) |  |  |
  - Never married |  | 68 (13.0) |  |  |
  - Widowed, divorced, separated |  | 8 (1.6) |  |  |
 Aboriginal and/or Torres Strait Islander (yes) | 522 | 18 (3.5) |  |  |
 Any smoking during pregnancy (yes) | 518 | 49 (9.5) |  |  |
 Previous pregnancy (yes) | 522 | 358 (69.1) |  |  |
 Previous birth (yes) | 522 | 303 (58.0) |  |  |
Previous Births | ||||
 Total number of previous pregnancies (excluding nulliparous women) | 354 |  | 1, 11 | 2.08 (1.5) |
 Previous birth typea |  |  |  |  |
  - Spontaneous Vaginal Birth | 303 | 247 (81.5) |  |  |
  - Instrumental Vaginal Birth | 303 | 44 (14.5) |  |  |
  - Caesarean Birth | 303 | 19 (6.3) |  |  |
 Previous PPH (yes) |  |  |  |  |
  - No | 271 | 241 (88.9) |  |  |
  - Yes | 271 | 14 (5.2) |  |  |
  - Unknown | 271 | 16 (5.9) |  |  |
Current Birth | ||||
 Received antenatal care (yes) | 522 | 516 (99.6) |  |  |
 Primary mode of care | 518 |  |  |  |
  - Midwife (public) |  | 297 (57.3) |  |  |
  - Midwife (private) |  | 32 (6.2) |  |  |
  - Obstetric clinic (public) |  | 16 (3.1) |  |  |
  - GP shared clinic |  | 160 (30.9) |  |  |
  - Other |  | 13 (2.5) |  |  |
 Place of birth | 522 |  |  |  |
  - Regional maternity unit |  | 466 (89.3) |  |  |
  - Rural maternity unit |  | 35 (6.7) |  |  |
  - Regional maternity unit (EPPM care) |  | 13 (2.5) |  |  |
  - Home birth (EPPM care) |  | 8 (1.5) |  |  |
 Placental Birth Management | 522 |  |  |  |
  - Active |  | 291 (55.7) |  |  |
  - Modified/mixed active |  | 191 (36.6) |  |  |
  - Physiological |  | 40 (7.7) |  |  |