Allergic rhinitis, rhinoconjunctivitis and hayfever symptoms among children are associated with frequency of truck traffic near residences: a cross sectional study

Table 2 Frequency of truck traffic and symptoms of rhinitis ever, current rhinitis, current rhinoconjunctivitis and hayfever along with crude and adjusted odd ratios

Frequency of trucks passing near homes on weekdays	Total^e	(%)	Crude OR (95 % CI)	P	Adjusted OR (95 % CI)	P
Rhinitis ever^a
Never	563	47.3	1		1
Seldom	1033	53.1	1.26 (1.02–1.55)	0.027	1.16 (0.92–1.56)	0.197
Frequently through the day	580	49.3	1.09 (0.86–1.37)	0.451	1.03 (0.79–1.34)	0.791
Almost all day	1212	55.9	1.43 (1.16–1.75)	0.001	1.46 (1.16–1.84)	0.001
Current rhinitis^b
Never	563	34.6	1		1
Seldom	1033	41.2	1.25 (1.01–1.55)	0.038	1.30 (0.99–1.62)	0.059
Frequently through the day	580	39.1	1.23 (0.97–1.57)	0.081	1.25 (0.95–1.64)	0.102
Almost all day	1212	42.5	1.46 (1.88–1.81)	0.000	1.60 (1.24–2.02)	0.000
Current rhinoconjunctivitis^c
Never	563	18.8	1		1
Seldom	1033	23.0	1.23 (0.95–1.59)	0.113	1.17 (0.89–1.54)	0.234
Frequently through the day	580	19.0	1.01 (0.75–1.37)	0.904	0.96 (0.70–1.30)	0.799
Almost all day	1212	25.7	1.54 (1.20–1.97)	0.001	1.42 (1.09–1.84)	0.008
Hayfever^d
Never	563	32.7	1		1
Seldom	1033	38.7	1.22 (0.98–1.51)	0.074	1.12 (0.87–1.43)	0.362
Frequently through the day	580	37.9	1.28 (1.00–1.63)	0.047	1.19 (0.90–1.57)	0.203
Almost all day	1212	38.2	1.34 (1.08–1.66)	0.007	1.23 (0.96–1.57)	0.087

^{a, b}Model adjusted for the folowing v mode of transport to school, being born in the area, vigorous physical activity, ETS exposure at home in the past 30 days, residential fuel heating type most frequently used at home
^cModel adjusted for mode of transport to school, being born in the area, vigorous physical activity, hours watching TV during normal week, residential heating fuel type most frequently used at home
^dModel adjusted for vigorous physical activity, residential fuel heating type most frequently used at home, ETS exposure at home
^eTotals for each risk factor are different due to difference in missing values

ISSN: 1476-069X