Table 6

Threshold values for positive bronchodilator response (BDR) defined from repeatability of spirometry in healthy children (Cintra) and from receiver operating characteristic (ROC) curve analyses

 CintraROC
BDR, n (%)BDR, n (%)
Threshold (%)Children with asthma (n=124)Healthy children (n=181)Threshold (%)Children with asthma (n=124)Healthy children (n=181)
FVC13.329 (23.4)9 (5.0%)562 (50.5)52 (28.7%)
FEV114.232 (25.8)13 (7.2%)761 (49.2)34 (18.8%)
FEV0.7513.549 (47.6)12 (6.6%)1164 (51.6)21 (11.6%)
FEV0.514.645 (43.7)18 (9.9%)1265 (52.4)39 (21.5%)
  • The numbers of healthy children and children with asthma classified as having a positive BDR are also shown.

  • BDR, bronchodilator response.