Table 1 Characteristics participants "Project On Preterm and Small for gestational age infants" (POPS) followed up at the age of 19 year
From: Gender differences in respiratory symptoms in 19-year-old adults born preterm
|  | total followed-up | Gestational age ≤ 32 weeks | Gestational age >32 weeks |
|---|---|---|---|
| Â | n = 690 | n = 508 | n = 182 |
Gestational age (weeks), mean (range), SD | 31 (26–41) ± 2.5 | 30 (26–32) ± 1.5 | 34 (32–41) ± 1.5 |
Birthweight (grams) mean (range), SD | 1309 (560–2580) ± 293 | 1320 (560–2580) ± 325 | 1277 (600–1495) ± 175 |
male/female (%) | 320/370 (46/54) | 244/264 (48/52) | 76/106 (42/58) |
BPD (yes/no/unknown) (n) | 58/505/127 | 55/362/91 | 3/143/36 |
duration mechanical ventilation (days) mean (range), SD | 4.5 (0–55) ± 8.1 | 5.7 (0–55) ± 8.9 | 1.1 (0–41) ± 3.8 |