Population characteristics
| Age at birth (wk) | Birth weight (kg) | Age at test (wk) | Respiratory rate at rest (breaths/min) | Apnoea index (no./hour) | Bradycardias* | Desaturations* | |
|---|---|---|---|---|---|---|---|
| The numbers represent medians (min-max). | |||||||
| *Bradycardias, fall in HR by <20%; desaturations, SaO2 <90%. | |||||||
| Healthy controls (n = 43) | 40 (37–41) | 3.5 (2.9–4.2) | 12 (4–40) | 26.7 (17–53) | 0 | 0 | 0 |
| Apnoea of infancy (n = 69) | |||||||
| PBCA (n = 28) | 38.2 (37–41) | 3.2 (2.8–4.0) | 10 (2–44) | 32.4 (21–49) | 3 (1–7.2) | 2 (0–4) | 14 (3–25) |
| OSA (n = 41) | 39.9 (37–41) | 3.4 (2.9–4.1) | 12 (4–36) | 27.8 (21–50) | 2.9 (1–9) | 11 (0–14) | 32 (4–41) |
| p = 0.24 | p = 0.09 | p = 0.54 | p = 0.04 | ||||
| PBCA ≠ controls = OA | |||||||