Variable | Totala | Prevalence (%) | Crude OR (95% CI)b | p | Adjusted OR (95% CI)b,c | p |
---|---|---|---|---|---|---|
Sex of child | Â | Â | Â | Â | Â | Â |
Female | 1790 | 35.1 | 1 | Â | 1 | Â |
Male | 1634 | 27.7 | 0.7 (0.61-0.81) | 0.000 | 0.69 (0.58-0.82) | 0.000 |
Residential area | Â | Â | Â | Â | Â | Â |
Kempton Park | 1117 | 37.1 | 1 | Â | 1 | Â |
Tembisa | 2301 | 28.9 | 0.69 (0.59-0.80) | 0.000 | 0.62 (0.51-0.76) | 0.000 |
Vigorous physical activity per week | Â | Â | Â | Â | Â | Â |
Never or occasionally | 984 | 23.3 | 1 | Â | 1 | Â |
Once or twice per week | 1417 | 35.9 | 1.84 (1.53-2.22) | 0.000 | 1.66 (1.34-2.07) | 0.000 |
Three or more times a week | 983 | 33.8 | 1.68 (1.37-2.05) | 0.000 | 1.39 (1.10-1.77) | 0.006 |
Residential heating fuel type most frequently used | Â | Â | Â | Â | Â | Â |
Electricity | 2041 | 30.0 | 1 | Â | 1 | Â |
Gas | 426 | 39.2 | 1.50 (1.21-1.86) | 0.000 | 1.47 (1.15-1.88) | 0.002 |
Paraffin | 631 | 31.8 | 1.06 (0.88-1.29) | 0.508 | 0.06 (0.83-1.37) | 0.597 |
Open fires (wood, coal) | 270 | 33.3 | 1.16 (0.89-1.52) | 0.261 | 1.16 (0.83-1.62) | 0.360 |
Frequency of trucks passing near homes on weekdays | Â | Â | Â | Â | Â | Â |
Never | 563 | 28.2 | 1 | Â | 1 | Â |
Seldom | 1033 | 33.3 | 1.26 (1.01-1.58) | 0.038 | 1.10 (0.84-1.44) | 0.351 |
Frequently through the day | 580 | 28.4 | 1.01 (0.78-1.30) | 0.938 | 0.89 (0.65-1.23) | 0.539 |
Almost all day | 1212 | 33.5 | 1.27 (1.02-1.59) | 0.020 | 1.32 (1.01-1.73) | 0.035 |
ETS exposure at school in the past 30Â days | Â | Â | Â | Â | Â | Â |
No | 1452 | 29.0 | 1 | Â | 1 | Â |
Yes | 1177 | 34.5 | 1.20 (0.08-1.50) | 0.004 | 1.22 (1.03-1.45) | 0.020 |