Determinants of impaired lung function among transient early wheezers at age 7yrs#
| Subjects | FVC | FEV1 | FEV1 | PEF | MEF75 | MEF50 | MEF25 | |
| n | % pred | % pred | % FVC | % pred | % pred | % pred | % pred | |
| Maternal smoking during pregnancy | ||||||||
| No | 135 | ±100.113.5 | ±99.913.4 | ±92.65.8 | ±101.020.6 | ±101.022.1 | ±101.625.9 | ±104.937.1 |
| Yes | 49 | ±100.511.0 | ±98.19.5 | ±*90.56.8 | ±99.115.6 | ±97.815.6 | ±*92.718.0 | ±94.034.2 |
| ≤Lower respiratory tract infections 3yrs | ||||||||
| ≤2 | 160 | ±101.113.4 | ±100.112.9 | ±91.96.3 | ±101.519.9 | ±101.320.8 | ±100.624.4 | ±102.938.0 |
| ≥3 | 40 | ±*96.99.7 | ±*96.39.0 | ±92.05.9 | ±96.318.7 | ±95.520.7 | ±*92.322.5 | ±94.128.4 |
±Data are presented as meansd
FVC: forced vital capacity
FEV1: forced expiratory volume in one second
PEF: peak expiratory flow
MEF75, MEF50 and MEF25%: maximal expiratory flow when 75, 50 and 25 of the FVC remains to be exhaled
% pred: percentage of the predicted value
#=: n199
*<: p0.5