Characteristics of children with and without successful sputum induction
| With sputum (n = 43)* | No sputum (n = 30)* | p Value | |
|---|---|---|---|
| AHI, Apnoea Hypopnoea Index; BMI, body mass index; FEV1, forced expiratory volume in the first second; FVC, forced vital capacity; OAI, obstructive apnoea index; SaO2, oxygen saturation; %TST with SaO2 <90%: percentage of total sleep time with oxygen saturation <90%. | |||
| *Values are median (IQR). | |||
| Age (years) | 11.8 (1.08–13.7) | 10.6 (8.8–11.6) | 0.005 |
| Male/female (n) | 30/13 | 22/8 | 0.742 |
| Weight (kg) | 53.4 (40.5–66.0) | 42.0 (29.6–59.9) | 0.071 |
| Height (m) | 1.5 (1.4–1.6) | 1.4 (1.3–1.5) | 0.008 |
| BMI (kg/m2) | 24.3 (20.7–27.4) | 22.8 (15.2–26.8) | 0.239 |
| Tonsil size, left | 1.0 (1.0–3.0) | 1.0 (1.0–2.0) | 0.617 |
| Tonsils size, right | 1.0 (0–3.0) | 1.0 (1.0–2.0) | 0.981 |
| FEV1 (% predicted) | 93.5 (84.0–100.0) | 97.0 (82.5–101.0) | 0.846 |
| FVC (% predicted) | 92.5 (85.0–100.0) | 95.0 (81.0–102.8) | 0.871 |
| FEV1/FVC | 90.0 (85.0–94.0) | 91.0 (90.0–94.0) | 0.247 |
| OAI | 0.2 (0.0–1.3) | 0.3 (0.0–1.4) | 0.592 |
| AHI | 2.0 (0.7–5.5) | 1.4 (0.2–5.4) | 0.340 |
| %TST with SaO2 <90% | 1.0 (0–0.03) | 2.5 (0.2–6.7) | 0.561 |
| SaO2 nadir (%) | 87.5 (83.0–91.0) | 89.0 (77.5–90.3) | 0.991 |
| Arousal index | 6.7 (4.9–11.2) | 6.0 (3.9–10.4) | 0.349 |
| Asthma, yes/no (n) | 12/31 | 6/24 | 0.444 |
| Allergic rhinitis, yes/no (n) | 30/13 | 19/11 | 0.567 |