Relationship between the degree of bronchial hyperresponsiveness at 16 months and 5, 7 and 9 years of age, and the persistence of symptoms or lung function impairment at 9 years of age.

The risks were of being a persistent wheezer between 5 and 9 years of age, of having an sRaw value at or above the median value of the study population at 9 years of age, and of having an FEV1/FVC value below the median value of the population at 9 years of age. Median values were 7.0 cmH2O.s for sRaw and 85.5% for FEV1/FVC. Odds ratios were obtained by logistic regression.