Table 1.
Baseline characteristics at trial entry in pregnant women with BMI ≥25 randomised to lifestyle advice or standard care who did not withdraw consent to use data. Figures are numbers (percentage) of women unless stated otherwise
| Characteristic | Lifestyle advice (n=1105) | Standard care (n=1097) | Total (n=2202) |
|---|---|---|---|
| Mean (SD) maternal age (years) | 29.3 (5.4) | 29.6 ( 5.6) | 29.4 ( 5.5) |
| Median (IQR) gestational age at entry (weeks) | 14.0 (11.9-17.0) | 14.1 (11.9-17.0) | 14.1 (11.9-17.0) |
| Median (IQR) BMI | 31.0 (28.1-35.9) | 31.1 (27.7-35.6) | 31.1 (27.9-35.8) |
| BMI category: | |||
| 25.0-29.9 | 458 (41.4) | 468 (42.7) | 926 (42.1) |
| 30.0-34.9 | 326 (29.5) | 318 (29.0) | 644 (29.2) |
| 35.0-39.9 | 202 (18.3) | 183 (16.7) | 385 (17.5) |
| ≥40.0 | 119 (10.8) | 128 (11.7) | 247 (11.2) |
| Public patients | 1081 (97.8) | 1067 (97.3) | 2148 (97.5) |
| Mean (SD) weight (kg) | 88.6 (17.3) | 88.2 (17.6) | 88.4 (17.4) |
| Mena (SD) height (cm) | 164.9 (6.6) | 164.8 (6.5) | 164.8 (6.6) |
| Race: | |||
| White | 995 (90.0) | 998 (91.0) | 1993 (90.5) |
| Asian | 26 (2.4) | 34 (3.1) | 60 (2.7) |
| Indian | 40 (3.6) | 35 (3.2) | 75 (3.4) |
| Other | 44 (4.0) | 30 (2.7) | 74 (3.4) |
| Smokers | 154 (13.9) | 126 (11.5) | 280 (12.7) |
| Nulliparous | 457 (41.4) | 441 (40.2) | 898 (40.8) |
| Previous: | |||
| Preterm birth | 57 (5.2) | 59 (5.4) | 116 (5.3) |
| Pre-eclampsia | 46 (4.2) | 51 (4.6) | 97 (4.4) |
| Stillbirth | 13 (1.2) | 6 (0.5) | 19 (0.9) |
| Neonatal death | 11 (1.0) | 7 (0.6) | 18 (0.8) |
| Caesarean section | 197 (17.8) | 214 (19.5) | 411 (18.7) |
| Family history of: | |||
| Diabetes | 288 (26.1) | 290 (26.4) | 578 (26.2) |
| Hypertension | 389 (35.2) | 369 (33.6) | 758 (34.4) |
| Heart disease | 187 (16.9) | 179 (16.3) | 366 (16.6) |
| Index of socioeconomic disadvantage*: | |||
| Unknown | 2 (0.2) | 1 (0.1) | 3 (0.1) |
| 1 (most disadvantaged) | 340 (30.8) | 321 (29.3) | 661 (30.0) |
| 2 | 271 (24.5) | 264 (24.1) | 535 (24.3) |
| 3 | 173 (15.7) | 174 (15.9) | 347 (15.8) |
| 4 | 150 (13.6) | 178 (16.2) | 328 (14.9) |
| 5 (least disadvantaged) | 169 (15.3) | 159 (14.5) | 328 (14.9) |
IQR=interquartile range; BMI=body mass index.
*Socioeconomic index as measured by SEIFA (socioeconomic indexes for areas (www.abs.gov.au/websitedbs/censushome.nsf/home/seifa?opendocument&navpos=260))