Table 3.
Demographics of patients included in the analysis based on pregnancy outcome.
| Variable | Delivery <33 weeks (n = 17) | Delivery 33–36 + 6 weeks (n = 27) | Delivery ≥37 weeks (n = 90) |
|---|---|---|---|
| Age (years), mean (range) | 29 (20–39) | 30.1 (22–39) | 30.9 (17–44) |
| BMI (kg/m2), mean (range) | 24.7 (17–37) | 26.3 (19–38) | 26.7 (19–52) |
| Ethnicity, n (%) | |||
| White European | 17 (100) | 26 (96.3) | 86 (95.5) |
| White/black Caribbean | 0 (0) | 0 (0) | 1 (1.1) |
| Asian-British | 0 (0) | 0 (0) | 1 (1.1) |
| Indian | 0 (0) | 1 (3.7) | 1 (1.1) |
| Other – Philipino | 0 (0) | 0 (0) | 1 (1.1) |
| Smoking status, n (%) | |||
| Yes | 9 (52.9) | 7 (25.9) | 18 (20.0) |
| No | 8 (47.1) | 21 (77.8) | 71 (78.9) |
| Not known | 0 (0) | 0 (0) | 1 (1.1) |
| Parity, mean (range) | 1.8 (0–6) | 1.8 (0–4) | 1.4 (0–7) |
| Gestational age of previous PTB (completed weeks), mean (range) | 29.3 (24–35) | 31.3 (24–35) | 31.0 (24–36) |
| Previous cervical surgery, n (%) | |||
| Yes | 5 (29.4) | 3 (11.1) | 36 (40.0) |
| No | 12 (70.6) | 24 (88.9) | 54 (60.0) |
| Randomised to Opptimum trial, n (%) | |||
| Yes | 3 (17.6) | 5 (18.5) | 17 (18.9) |
| No | 14 (82.4) | 22 (81.5) | 73 (81.1) |
| Gestational age at delivery (completed weeks), mean (range) | 29.1 (25–32) | 35.0 (33–36) | 39.0 (37–42) |