Comparison of main neonatal outcomes by response status (data returned within or outside of the 22–28 month follow up window or not at all) at 2 years of age
| Variable | Within window (N = 373) | Outside window (N = 55) | No data (N = 171*) | p Value | |||
|---|---|---|---|---|---|---|---|
| No/total | % | No/total | % | No/total | % | ||
| *Includes three questionnaires returned without any data. | |||||||
| †Postmenstrual age. | |||||||
| ‡Cranial ultrasound scans after day 14. | |||||||
| Chronic lung disease at 36 weeks† | 218/373 | 58 | 30/55 | 55 | 80/164 | 49 | 0.12 |
| Oxygen dependent at discharge | 83/371 | 22 | 13/55 | 24 | 26/162 | 16 | 0.22 |
| Major cranial abnormality‡ | 39/346 | 11 | 8/49 | 16 | 19/150 | 13 | 0.58 |