Table 2.

Risk of chronic lung diseases among three exposed groups compared with the non-exposed group

Variables	Non-exposed group	Fetal-exposed group	Infant-exposed group	Preschool-exposed group
Severely affected famine area
Prevalence (%)	5.6	5.6	10.4	5.6
p*		0.973	0.022	0.983
OR (95% CI)*	Ref.	0.99 (0.53 to 1.84)	1.95 (1.10 to 3.44)	0.99 (0.60 to 1.66)
p†		0.953	0.009	0.437
OR (95% CI)†	Ref.	0.98 (0.43 to 2.20)	2.57 (1.26 to 5.25)	0.75 (0.36 to 1.56)
Less severely affected famine area
Prevalence (%)	6.4	6.9	6.4	7.6
p*		0.691	0.964	0.336
OR (95% CI)*	Ref.	1.09 (0.71 to 1.66)	1.01 (0.60 to 1.70)	1.21 (0.82 to 1.76)
p†		0.254	0.398	0.471
OR (95% CI)†	Ref.	1.38 (0.79 to 2.41)	1.33 (0.69 to 3.56)	1.22 (0.71 to 2.10)
p for interaction between area and group*	Ref.	0.468	0.109	0.178
p for interaction between area and group†	Ref.	0.421	0.061	0.223

*Single variance binary logistic regression model.

†Multivariable logistic regression model, adjusted for gender, smoking, drinking, family economic status and the highest educational attainment of parents.