Table 2.

Association between the history of atopy and case-control status

History of Atopy	OR (95% CI)
	Model I	Model II	Model III
	63 Cases & 80 Matched Sibling Controls matched analysis	122 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
Number 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: None	ref.	ref.	ref.	ref.
1 condition	0.65 (0.28, 1.49)	0.62 (0.37, 1.04)	0.64 (0.42, 0.96)	0.70 (0.45, 1.1)
≥2 conditions	0.22 (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
Allergies	0.53 (0.15, 1.84)	0.54 (0.28, 1.07)	0.34 (0.23, 0.50)	0.43 (0.28, 0.66)
Asthma	0.43 (0.19, 1.00)	0.84 (0.47, 1.50)	0.96 (0.58, 1.59)	0.71 (0.39, 1.27)
Eczema	0.74 (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