TABLE 2.

Association of Distance of Residence to the Nearest Major Road and Respiratory Symptoms; Unadjusted Logistic Regression Models

	Persistent Wheeze			Chronic Cough			Chronic Phlegm
	No. of Subjects (N = 2,285)	No. of Cases (N = 700)	OR (95% CI)	No. of Subjects (N = 2,243)	No. of Cases (N = 496)	OR (95% CI)	No. of Subjects (N = 2,201)	No. of Cases (N = 583)	OR (95% CI)
Distance to road (meters)
≤50	516	184	1.33 (1.05–1.70)	507	127	1.42 (1.08–1.86)	503	145	1.35 (1.04–1.75)
>50 to 100	229	61	0.92 (0.66–1.27)	225	44	1.03 (0.71–1.50)	215	56	1.11 (0.79–1.58)
>100 to 200	421	126	1.09 (0.84–1.41)	413	91	1.20 (0.89–1.62)	399	108	1.21 (0.92–1.61)
>200 to 300	294	84	0.97 (0.72–1.30)	286	62	1.16 (0.83–1.63)	285	74	1.15 (0.84–1.58)
>300 to 400	205	64	1.13 (0.81–1.58)	206	50	1.43 (0.99–2.06)	202	57	1.37 (0.97–1.94)
>400*	620	181	1.00	606	122	1.00	597	143	1.00

^*Reference category.