Characteristics of subjects lost to follow up and subjects who participated in the second survey
BHR = bronchial hyperreactivity; DFEV1 = difference in forced expiratory volume in one second.
2-150 Mean (SD).
2-160 No. (%).
2-1 Sum of the wheal sizes of the prick tests with six different aeroallergens.
2-2 Allergic trigger of symptoms according to parental questionnaire.
2-3 Dampness in the child’s home according to parental questionnaire.
2-151 p<0.05; comparison of childhood and adolescent data, McNemar’s chi-square test