Table 1 Descriptive characteristics of cases and controls
From: Diet, occupational exposure and early asthma incidence among bakers, pastry makers and hairdressers
Characteristic | Cases (N = 31) | Controls (N = 196) | Total (N = 227) | p | Test usedΩ | |
|---|---|---|---|---|---|---|
Women | % | 8 (25.8%) | 94 (48.0%) | 102 (44.9%) | 0.02 | Chi2 |
Age (years) | Mean [SD] | 26.1 [2.5] | 25.1 [3.0] | 25.2 [2.9] | 0.06 | T |
Height (cm) | Mean [SD] | 173.4 [8.0] | 170.1 [9.2] | 170.5 [9.1] | 0.06 | T |
Weight (kg) | Mean [SD] | 77.5 [15.5] | 70.2 [14.1] | 71.2 [14.5] | 0.009 | T |
Tobacco smoking (at visit): | ||||||
Never smokers | % | 10 (32.2%) | 76 (38.8%) | 86 (37.9%) | ||
Ex smokers | % | 7 (22.6%) | 26 (13.3%) | 33 (14.5%) | 0.38 | Chi2 |
Current smokers | % | 14 (45.2%) | 94 (48.0%) | 108 (47.6%) | ||
Occupation: | ||||||
Hairdressers | % | 7 (22.6%) | 85 (43.4%) | 92 (40.5%) | 0.03 | Chi2 |
Exposure duration (years) | Mean [SD] | 6.1 [3.1] | 6.7 [2.2] | 6.6 [2.4] | 0.25 | KW |
Sector dropout† | % | 10 (32.3%) | 22 (11.2%) | 32 (14.1%) | 0.004 | F |