Comparative baseline data for surviving infants who were followed up or lost to the follow-up study
| Followed-up (n=265) | Lost to follow-up (n=46) | p Value | |
|---|---|---|---|
| Gestational age (weeks)* | 25 5/7±1 2/7 | 26 0/7±1 2/7 | 0.13 |
| Birth weight (g)* | 721±154 | 744±148 | 0.34 |
| Male | 145 (55) | 29 (63) | 0.29 |
| Moderate/severe BPD† | 60 (23) | 12 (26) | 0.63 |
| IVH all grades | 81 (31) | 13 (29) | 0.82 |
| Severe IVH (grade 3–4) | 32 (12) | 6 (13) | 0.81 |
| Periventricular leukomalacia | 24 (9) | 1 (2) | 0.15 |
| Hydrocephalus internus | 41 (16) | 8 (17) | 0.82 |
| Hydrocephalus internus with shunt | 13 (5) | 2 (4) | 1.00 |
| Retinopathy of prematurity | 129 (49) | 24 (52) | 0.66 |
| Severe retinopathy ≥grade 3 | 36 (14) | 8 (17) | 0.49 |
| Weight at 36 weeks PMA (g)‡ | 1948 (1000–2830) | 2055 (1235–3120) | 0.12 |
Unless otherwise specified, data are given as: number of infants (%), χ2 test.
*Mean±SD, Student's t-test.
†BPD according to the trial definition, corresponding to moderate or severe BPD according to the consensus definition.32
‡Median (minimum–maximum), Mann-Whitney U test.
BPD, bronchopulmonary dysplasia; IVH, intraventricular haemorrhage; PMA, postmenstrual age.