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Demographic variables of the subjects in the ROP and control groups.
| Variable | ROP | Control | P-value |
|---|---|---|---|
| Gestational age in weeks (mean±SD) | 29.09±2.23 | 31.29±2.33 | 0.0001 |
| Birth weight in g (mean±SD) | 1223.33±394.23 | 1508.8±449.29 | 0.0044 |
| Postmenstrual age at blood draw in weeks (mean±SD) | 39.44±3.20 | 37.98±2.30 | 0.0409 |
| Body weight at blood draw in g (mean±SD) | 2880.29±940.19 | 2600.4±666.21 | 0.2503 |
| Sex (male/female) | 34/24 | 13/12 | 0.57646 |
