Table 2

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