Demographic characteristics and hypoxic test results of the study population
| Variables | All infants(n = 47) | nCLD infants(n = 32) | Infants without nCLD(n = 15) |
|---|---|---|---|
| PMA, postmenstrual age; HCT, hypoxic challenge test; Spo2, pulse oxygen saturation. | |||
| PMA at time of HCT (weeks) | |||
| Median (10–90th centiles) | 46 (36.8–113.6) | 64.5 (38.0–144.6) | 37.0 (34.6–42.4) |
| Range | 34–228 | 38–228 | 34–43 |
| Corrected age at time of HCT (months) | |||
| Median (10–90th centiles) | 1.4 (−0.7–17.0) | 5.7 (−0.5–24.1) | −0.7 (−1.2–0.6) |
| Range | −1.4–43.4 | −0.5–43.4 | −1.4–0.7 |
| Body weight at time of HCT (kg) | |||
| Median (10–90th centiles) | 4.6 (2.2–10.1) | 6.2 (2.6–10.5) | 2.2 (2.0–3.9) |
| Range | 1.9–14.2 | 2.6–14.2 | 1.9–4.6 |
| Gestational age (weeks) | |||
| Median (10–90th centiles) | 27.0 (24.0–30.2) | 26.0 (23.3–29.7) | 28.0 (25.0–34.8) |
| Range | 23–36 | 23–31 | 25–36 |
| Birth weight (kg) | |||
| Median (10–90th centiles) | 0.9 (0.6–1.6) | 0.9 (0.6–1.4) | 1.0 (0.7–3.1) |
| Range | 0.5–4.5 | 0.5–2.0 | 0.7–4.5 |
| Sex (boys:girls) | 25:22 | 19:13 | 6:9 |
| Spo2 at room air (%) | |||
| Median (10–90th centiles) | 98 (96–100) | 98 (96–100) | 98 (97–100) |
| Range | 95–100 | 95–100 | 97–100 |
| Hypoxia test (pass:fail) | 9:38 | 9:23 | 0:15 |
| Supplemental oxygen (ml/min) | |||
| Median (10–90th centiles) | 250 (125–500) | ||
| Range | 16–500 | ||