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Characteristics of study population (n = 276)
| Mean±SD | Median | 25th percentile | 75th percentile | |
|---|---|---|---|---|
| Gestational age at birth (wk) | 27.6±3.0 | 27 | 25 | 29 |
| Birth weight (g) | 999±294 | 1,000 | 760 | 1,250 |
| Ventilator days (d) | 15.4±38.5 | 2.7 | 0 | 28.9 |
| Length of stay (d) | 65.6±42.9 | 57.6 | 32.3 | 94.7 |
| PMA at discharge (wk) | 37.7±4.7 | 37 | 35 | 39 |
Abbreviations: PMA, postmenstrual age (defined as gestational age at birth + chronological age); SD, standard deviation.
