Table 1

Distribution of subjects at recruitment and the age of 50

 Recruitment
n=479
Age 50
Deceased
n=21
Followed up
n=346 (76%)
Lung function test performed n=197 (43%)
Control (non-asthmatics)105 (22%)577 (22%)48 (24%)
Mild wheezy bronchitis74 (15%)3 50 (14%)23 (12%)
Wheezy bronchitis104 (22%)678 (23%)43 (22%)
Asthma113 (24%)281 (24%)49 (25%)
Severe asthma83 (17%)560 (17%)34 (17%)
Male (%)61%81%60%63%
  • Note that five original records were lost, altering the recruitment total to 479 subjects and 21 subjects were deceased, leaving 458 survivors. The percentages followed up are based on the survivors.