Table 4

 Comparison of database indexes of asthma severity and control against lung function measures

VariableNMeanp Value
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.
*Moderate vs mild asthma.
†Severe vs mild asthma.
‡Severe vs moderate asthma.
Asthma severity(N = 71)
MildFEV1 predicted %3589.8
ModerateFEV1 predicted %2174.10.007*
SevereFEV1 predicted %1561.5<0.001†
0.033‡
N = 56
MildFEV1/FVC3075.8
ModerateFEV1/FVC1868.10.006*
SevereFEV1/FVC861.80.030†
0.205‡
Asthma control(N = 71)
ControlledFEV1 predicted %3889.5
UncontrolledFEV1 predicted %3367.3<0.001
N = 56
ControlledFEV1/FVC3375.3
UncontrolledFEV1/FVC2365.70.001