Table 3.

Regression analysis to determine protective effect of living on mainland China and risk of current wheeze in relation to environmental factors and diet

Model	Description	Odds ratio (95% Cl)
1	Unadjusted model	0.61 (0.49 to 0.77)
2	Model 1 plus propensity score	0.62 (0.41 to 0.94)
3	Model 2 plus sex	0.64 (0.42 to 0.97)
4	Model 3 plus foam pillow	0.78 (0.50 to 1.20)
5	Model 4 plus fruit	0.79 (0.51 to 1.22)
6	Model 5 plus cooking by gas	0.83 (0.54 to 1.30)
7	Model 6 plus damp housing	0.86 (0.55 to 1.33)
8	Model 7 plus cotton quilt	0.87 (0.55 to 1.37)
9	Model 8 plus raw vegetables	0.99 (0.61 to 1.60)