Observational Study
Copyright ©The Author(s) 2021.
World J Clin Pediatr. Nov 9, 2021; 10(6): 168-176
Published online Nov 9, 2021. doi: 10.5409/wjcp.v10.i6.168
Table 3 Factors affecting the % time to peak expiratory flow to total expiratory time change after bronchodilation

Regression coefficient β
P value
Breastfeeding duration-0.3350.010
Cigarette smoke exposure0.3530.007
Male sex0.0050.974
Prematurity0.0310.833
Family History of asthma/atopy0.1210.379