Table 1. Maternal demographics.
| Whole cohort[n = 26110] | EPDS < 9[n = 20512] | EPDS ≥12[n = 2708] | p value | |
|---|---|---|---|---|
| Age* | 29 [26–33] | 29 [26–33] | 28 [24–33] | <0.001 |
| BMI categories (kg/m2) | ||||
| Underweight (<18.5) | 2131 (8.2) | 1650 (8.0) | 229 (8.5) | 0.993 |
| Normal (18.5–24.9) | 14339 (55.0) | 11385 (55.5) | 1408 (52.0) | 0.001 |
| Overweight (25.0–29.9) | 5336 (20.4) | 4139 (20.2) | 583 (21.5) | 0.057 |
| Obese1 (30.0–34.9) | 2360 (9.0) | 1842 (9.0) | 251 (9.3) | 0.645 |
| Obese2 (35.0–39.9) | 954 (3.7) | 742 (3.6) | 108 (4.0) | 0.287 |
| Obese3 (≥40.0) | 666 (2.6) | 510 (2.5) | 92 (3.4) | 0.003 |
| Ethnicity | ||||
| Caucasian | 16202 (62.1) | 13066 (63.7) | 1519 (56.1) | <0.001 |
| ATSI | 569 (2.2) | 389 (1.9) | 103 (3.8) | <0.001 |
| Asian | 4161 (16.0) | 3254 (15.9) | 367 (13.6) | 0.132 |
| Indian | 764 (2.9) | 605 (3.0) | 61 (2.3) | 0.081 |
| Other | 4368 (16.7) | 3164 (15.4) | 650 (24.0) | <0.001 |
| Born outside Australia | 11314 (43.3) | 8724 (42.5) | 1231 (45.5) | <0.001 |
| Parity | ||||
| P0 | 12224 (46.8) | 9557(46.6) | 1274 (47.0) | 0.099 |
| P ≥ 1 | 13855 (53.1) | 10926 (53.3) | 1434 (53.0) | 0.073 |
| Hypertension including PET | 1435 (5.5) | 1098 (5.4) | 176 (6.5) | 0.043 |
| Gestational Diabetes | 1705 (6.5) | 1308 (6.4) | 188 (6.9) | 0.668 |
| Thyroid Disease | 1094 (4.2) | 827 (4.0) | 131 (4.8) | 0.013 |
| Total length of labour (minutes)* | 365 [216–570] n = 21388 | 366 [215–570] n = 16885 | 352 [216–561] n = 2181 | 0.252 |
| Length of stay (days)* | 2 [1–3] n = 26085 | 2 [1–3] n = 20496 | 2 [2,3] n = 2701 | <0.001 |
EPDS: Edinburgh Postnatal Depression Scale.
BMI: Body Mass Index.
PET: Pre-eclampsia.
ATSI: Aboriginal and Torres Strait Islander.
Data presented as Number (percentage) unless otherwise specified.
*Data presented as Median [Interquartile range].