Table 1

Clinical and lung function characteristics of the children in the study (n = 123).a

Clinical characteristicsTotal
Use of asthma medication during previous 12 months according to parents23 (18.7)
Respiratory symptoms ever experienced
 Wheeze70 (56.9)
 Shortness of breath26 (21.1)
Respiratory symptoms experienced in previous 12 months40 (32.5)
 Wheeze29 (23.6)
 Coughing50 (40.7)
 Wheezing at time of inclusion51 (41.5)
Lung function characteristics
 FVC as % of predictedb,c98.8 (11.3)
 FEV1 as % of predictedb,c107.1 (11.7)
 PC20 (mg/ml)b,d3.0 (3.3)
 PC20b
  No responsiveness15 (21.1)
  Mild responsiveness29 (40.8)
  Moderate responsiveness24 (33.8)
  Severe responsiveness3 (4.2)
  • Data expressed as numbers (percentages).

  • a 27 children did not attend spirometry or were afraid of challenge testing.

  • b children with complete data on the lung function tests, n = 72;

  • c data expressed as means (± SD).

  • d data expressed as geometric means (SD). SD = standard deviation. FVC = forced vital capacity. FEV = forced expiratory volume.