Table 4.
Comparison of lung function parameters between asthmatics and healthy controls across all age
| aVariables | N | Asthmatic | N | Healthy | Differences (95%CI) Between Asthmatic and Healthy Children | * P Value |
|---|---|---|---|---|---|---|
| LCI | 33 | 6.71 (1.11) | 45 | 6.18 (0.51) | 0.53 (0.16, 0.91) | 0.01 |
| LCI z‐score | 33 | 0.03 (1.62) | 45 | −0.83 (1.10) | 0.86 (0.24, 1.47) | 0.01 |
| FRC | 33 | 1.16 (0.66) | 45 | 1.10 (0.54) | 0.06 (−0.07, 0.19) | 0.34 |
| FRC z‐score | 33 | −0.37 (1.02) | 45 | −0.54 (1.20) | 0.17 (−0.34, 0.68) | 0.51 |
| Scond | 25 | 0.04 (0.03) | 33 | 0.02 (0.02) | 0.02 (0.003, 0.03) | 0.02 |
| FEV1 (% predicted) | 26 | 97.0 (12.5) | 38 | 100.1 (11.3) | −4.1 (−9.9, 1.7) | 0.16 |
| FEV1 z‐score | 26 | −0.23 (1.02) | 38 | 0.02 (0.93) | −0.25 (−0.74, 0.24) | 0.31 |
| FEV1/FVC (% predicted) | 25 | 92.5 (8.1) | 27 | 97.5 (8.4) | −4.6 (−9.3, 0.09) | 0.05 |
| FEV1/FVC z‐score | 25 | −0.99 (1.11) | 27 | −0.25 (1.14) | −0.74 (−1.36, −0.11) | 0.02 |
a
Variables are presented as mean (SD).
*
P values were calculated from t tests of coefficients from linear regressions. The analyses were adjusted for age and height values when raw scale values were used, whereas no adjustment were performed when z‐score or percent predicted values were used.