Table 5

 Age-stratified comparison of database indexes of asthma severity and control and FEV1 measures

VariableNMeanp Value
FEV1, forced expiratory volume in 1 s.
*Moderate vs mild asthma.
†Severe vs mild asthma.
‡Severe vs moderate asthma.
Asthma severity
⩽45 years (N = 34)
    MildFEV1 predicted %2095.2
    ModerateFEV1 predicted %968.70.002*
    SevereFEV1 predicted %561.10.002†
0.519‡
>45 years (N = 37)
    MildFEV1 predicted %1582.6
    ModerateFEV1 predicted %1278.10.552*
    SevereFEV1 predicted %1061.60.026†
0.015‡
Asthma control
⩽45 years (N = 34)
    ControlledFEV1 predicted %2192.0
    UncontrolledFEV1 predicted %1368.90.004
>45 years (N = 37)
    ControlledFEV1 predicted %1786.4
    UncontrolledFEV1 predicted %2066.20.004