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Table 1 Health outcomes and demographic characteristics of the study participants (n = 3424)

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

Variable Total Percentage
Rhinitis ever 1790 52.3
Current rhinitis 1372 40.1
Current rhinoconjunctivitis 769 22.5
Ever had hayfever 1285 37.5
Sex of child
Female 1790 52.3
Male 1634 47.7
Type of Area
Township 2301 67.2
Suburb 1117 32.6
Missing 6 0.18
Period lived in the area
Less than 6 months 253 7.4
6 to 12 months 216 6.3
1 to 2 years 346 10.1
3 years and longer 2609 76.2
Born in the areas of Tembisa and Kempton Park
Yes 1812 52.9
No 1609 47.0
Missing 3 0.1
Type of house
Brick 2938 85.8
Mud 45 1.3
Corrugated iron 184 5.5
Combination 126 3.7
Missing 126 3.7
Vigorous physical activity per week
Never or occasionally 984 28.7
Once or twice per week 1417 41.4
Three or more times a week 983 28.7
Missing 40 1.2
Hours watching television on average in a day
Less than 1 h 532 15.5
Hour but less than 3 h 835 24.4
2 h but less than 5 h 827 24.4
More than 5 h 1213 35.4
Missing 17 0.50
ETS exposure at home in the past 30 days
Yes 1452 42.4
No 1460 42.6
Missing 512 15.0
ETS exposure at school in the past 30 days
Yes 1177 34.4
No 1452 42.4
Missing 755 23.2
Residential cooking fuel type most frequently used
Electricity 2995 87.5
Gas 179 5.2
Paraffin 200 5.8
Open fires (wood, coal) 30 0.9
Missing 20 0.6
Residential heating fuel type most frequently used
Electricity 2041 59.6
Gas 426 12.4
Paraffin 631 18.4
Open fires (wood, coal) 270 7.9
Missing 56 1.64
Mode of transport to school
Walk 1728 50.5
Taxi\Bus 708 20.7
Motor car 683 20.0
Combination 201 5.9
Train 100 2.9
Missing 4 0.1
Frequency of trucks passing near homes on weekdays
Never 563 16.4
Seldom 1033 30.2
Frequently through the day 580 16.9
Almost every day 1212 35.4
Missing 36 1.1