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Table 3 The prevalence of self-reported rhinitis ever along with crude and adjusted odd ratios

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

Variable Totala Rhinitis evera (%) Crude OR (95 % CI) P Adjusted OR (95 % CI)b P
Mode of transport to school
Walk 1728 51.7 1   1  
Taxi/Bus 708 49.7 0.92 (0.77–1.10) 0.400 0.99 (0.81–1.21) 0.965
Motor car 683 53.9 1.08 (0.90–1.29) 0.358 1.15 (0.93–1.42) 0.186
Combination 201 60.8 1.42 (1.05–1.92) 0.019 1.45 (1.04–2.04) 0.028
Train 100 53.0 1.05 (0.70–1.58) 0.798 1.13 (0.71–1.81) 0.582
Frequency of trucks passing near homes on weekdays
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
Being born in Tembisa/Kempton park areas
No 1609 49.3 1   1  
Yes 1812 54.9 1.28 (1.11–1.47) 0.000 1.22 (1.05–1.43) 0.008
Vigorous physical activity
Never or occasionally 984 49.1 1   1  
Once or twice per week 1417 54.8 1.26 (1.07–1.48) 0.005 1.27 (1.06–1.53) 0.008
3 or more times per week 983 52.1 1.12 (0.94–1.34) 0.193 1.08 (0.88–1.31) 0.447
ETS exposure at home in the past 30 days
No 1460 51.3 1   1  
Yes 1452 55.7 1.19 (1.03–1.38) 0.017 1.15 (0.99–1.34) 0.056
Residential heating fuel type most frequently used
Electricity 2041 51.4 1   1  
Gas 426 56.3 1.23 (0.99–1.52) 0.055 1.23 (0.98–1.56) 0.070
Paraffin 631 52.9 1.07 (0.87–1.31) 0.487 1.04 (0.84–1.28) 0.694
Open fire 270 51.1 0.99 (0.76–1.28) 0.973 1.07 (0.80–1.14) 0.621
  1. aTotals for each risk factor are different due to difference in missing values
  2. bModel adjusted for all the variables in this table