Table 1. Characteristics of responders <5 years of age according to gestational groups.
| Very Preterm | Moderate Preterm | Late Preterm | Full Term | |
|---|---|---|---|---|
| N = 519 | N = 486 | N = 1,149 | N = 1,403 | |
| Gestational age, weeks | 29.7* | 33.7* | 35.7* | 39.6* |
| (mean, 95%CI) | (29.5,29.9) | (33.6,33.7) | (35.6,35.7) | (39.6,39.7) |
| Birthweight, kg | 1.45* | 2.18* | 2.64* | 3.46* |
| (mean, 95%CI) | (1.41, 1.50) | (2.14, 2.22) | (2.61, 2.66) | (3.43, 3.49) |
| Male (%) | 260 (50%) | 275 (57%) | 621 (54%) | 743(53%) |
| WIMD rank (median) Range: 1–1909 | 898 | 929 | 934 | 997 |
| Age, years | 2.24 | 2.22 | 2.29 | 2.24 |
| (mean, 95% CI) | (2.16, 2.32) | (2.14, 2.30) | (2.24, 2.35) | (2.19, 2.28) |
| Antenatal maternal smoking | 72/511 (14.1%) | 56/483 (11.6%) | 136/1,143 (11.9%) | 133/1,385 (9.6%) |
| Maternal age, years | 30.5 | 30.5 | 30.1 | 30.3 |
| (mean, 95%CI) | (30.0, 31.1) | (30.0, 31.0) | (29.7, 30.5) | (30.0, 30.6) |
| Mode of delivery (CS or not) | 288 (55.5%)* | 263 (54.1%)* | 505 (44%)* | 378 (26.9%)* |
| Missing data | 33 (6.4%) | 23 (4.7%) | 60 (5.2%) | 46 (3.3%) |
| IUGR | 71(13.7%)* | 64(13.2%)* | 111(9.7%)* | 97(6.9%)* |
*Significant difference (p<0.001) between groups.