Table 3.

Association between dietary zinc intake and asthma.

Quartile	ORa (95% CIb)
	No.	n(%)	Crude	p-Value	Model 1	p-Value	Model 2	p-Value	Model 3	p-Value
Zinc intake(mg/day)
Qc1(≤5.68)	1141	933 (81.8)	1(Ref)		1(Ref)		1(Ref)		1(Ref)
Qc2(5.69∼8.36)	1156	916 (79.2)	0.85 (0.69∼1.05)	0.126	0.84 (0.68∼1.03)	0.097	0.79 (0.64∼0.99)	0.037	0.78 (0.62∼0.98)	0.03
Qc3(8.37∼11.95)	1147	904 (78.8)	0.83 (0.67∼1.02)	0.076	0.8 (0.65∼0.99)	0.041	0.79 (0.63∼0.98)	0.032	0.76 (0.6∼0.98)	0.032
Qc4(≥11.96)	1153	881 (76.4)	0.72 (0.59∼0.88)	0.002	0.76 (0.62∼0.93)	0.009	0.74 (0.6∼0.92)	0.007	0.71 (0.53∼0.95)	0.022
Trend. test	4597			0.002		0.01		0.012		0.03

Model 1 was adjusted for age, sex, race and ethnicity, PIR; Model 2 was adjusted for Model 1+family asthma, second-hand smoking, EOPC, WBC, HGB; Model 3 was adjusted for Model 2+calorie consumption, protein consumption, carbohydrate consumption, sugar consumption, fiber consumption, fat consumption.

^aOdds ratio.

^bConfidence interval.

^cQuartiles based on dietary zinc consumption