Table 1.
Baseline characteristics of participants contributing one or more biological specimens
| Characteristic | Lifestyle advice group n = 992 | Standard care group n = 969 | Total n = 1961 |
|---|---|---|---|
| Maternal age (years), mean (SD) | 29.3 (5.5) | 29.6 (5.6) | 29.5 (5.5) |
| Gestational age at entry (weeks), median (IQR) | 14.0 (11.9–16.9) | 14.1 (11.9–17.0) | 14.1 (11.9–17.0) |
| Body mass index (kg/m2), median (IQR) | 31.2 (28.1–35.9) | 31.1 (27.8–35.8) | 31.1 (28.0–35.9) |
| Body mass index category, N (%) | |||
| 25.0–29.9 | 409 (41.2) | 408 (42.1) | 817 (41.7) |
| 30.0–34.9 | 290 (29.2) | 286 (29.5) | 576 (29.4) |
| 35.0–39.9 | 184 (18.5) | 159 (16.4) | 343 (17.5) |
| ≥40.0 | 109 (11.0) | 116 (12.0) | 225 (11.5) |
| Public patient, N (%) | 974 (98.2) | 944 (97.4) | 1918 (97.8) |
| Weight (kg), mean (SD) | 88.7 (17.3) | 88.5 (17.6) | 88.6 (17.4) |
| Height (m), mean (SD) | 1.6 (0.1) | 1.6 (0.1) | 1.6 (0.1) |
| Race: N (%) | |||
| Caucasian | 899 (90.6) | 885 (91.3) | 1784 (91.0) |
| Asian | 21 (2.1) | 30 (3.1) | 51 (2.6) |
| Other | 72 (7.3) | 54 (5.6) | 126 (6.4) |
| Smoker, N (%) | 142 (14.3) | 116 (12.0) | 258 (13.2) |
| Nulliparous, N (%) | 407 (41.0) | 389 (40.1) | 796 (40.6) |
| Index of socio-economic disadvantage, N (%) | |||
| Unknown | 1 (0.1) | 1 (0.1) | 2 (0.1) |
| Quintile 1 (Most Disadvantaged) | 308 (31.0) | 284 (29.3) | 592 (30.2) |
| Quintile 2 | 242 (24.4) | 238 (24.6) | 480 (24.5) |
| Quintile 3 | 156 (15.7) | 149 (15.4) | 305 (15.6) |
| Quintile 4 | 133 (13.4) | 154 (15.9) | 287 (14.6) |
| Quintile 5 (Least Disadvantaged) | 152 (15.3) | 143 (14.8) | 295 (15.0) |