Table 2.

Association between the history of atopy and case-control status

History of atopyOR (95% confidence interval)
Model I
Model II
Model III
63 cases & 80 matched sibling controls matched analysis122 cases & 191 matched friend controls matched analysis(a) 388 cases & 177 clinic-based controls unmatched analysis(b) 239 cases & 177 clinic-based controls unmatched analysis
No of atopic conditions
Atopy-related ordinal score (0,1,2,3)0.55 (0.30, 1.01)*0.69 (0.48, 1.0)*0.57 (0.44, 0.75)*0.60 (0.44, 0.81)*
Categories: noneReferenceReferenceReferenceReference
    1 condition0.65 (0.28, 1.49)0.62 (0.37, 1.04)0.64 (0.42, 0.96)0.70 (0.45, 1.1)
    ≥2 conditions0.22 (0.04, 1.16)0.57 (0.24, 1.33)0.28 (0.15, 0.52)0.27 (0.13, 0.56)
Specific atopy-related conditions
    Allergies0.53 (0.15, 1.84)0.54 (0.28, 1.07)0.34 (0.23, 0.50)0.43 (0.28, 0.66)
    Asthma0.43 (0.19, 1.00)0.84 (0.47, 1.50)0.96 (0.58, 1.59)0.71 (0.39, 1.27)
    Eczema0.74 (0.13, 4.35)0.42 (0.15, 1.18)0.70 (0.30, 1.64)0.79 (0.31, 2.01)
  • * OR per increase in one atopic condition.