Table 2
Contribution of predictors to log-transformed indoor BTEX concentrations, household population aged 3 to 79, Canada, 2009 to 2011
BTEX component / Predictors | % change | 95% confidence interval | p-value | |
---|---|---|---|---|
from | to | |||
Benzene (R2 = 0.11) | ||||
Overall model | Note ...: not applicable | Note ...: not applicable | Note ...: not applicable | 0.002 |
Smoking in home every day/almost every day | 136 | 95 | 189 | <0.0001 |
Presence of garage | 60 | 36 | 90 | <0.0001 |
Model-making in past 3 months | 31 | 1 | 72 | 0.0435 |
Open windows on typical day in past week | -21 | -36 | -3 | 0.0279 |
Use of candles in past week | 12 | -1 | 27 | 0.0781 |
Toluene (R2 = 0.08) | ||||
Overall model | Note ...: not applicable | Note ...: not applicable | Note ...: not applicable | <0.0001 |
Presence of garage | 54 | 22 | 92 | 0.0012 |
Use of paint in past week | 52 | 9 | 112 | 0.0162 |
Age of home (years) | 0.0229 | |||
Less than 20 | 46 | 15 | 86 | 0.0042 |
20 to 39 | 32 | -2 | 79 | 0.0621 |
Use of paint remover in past week | 82 | 7 | 206 | 0.0304 |
Smoking in home every day/almost every day | 31 | 6 | 60 | 0.0137 |
Ethylbenzene (R2 = 0.05) | ||||
Overall model | Note ...: not applicable | Note ...: not applicable | Note ...: not applicable | 0.0001 |
Presence of garage | 54 | 30 | 84 | 0.0001 |
Number of occupants | 24 | 38 | 5 | 0.0208 |
Renovations in past month | 39 | 4 | 86 | 0.0293 |
Use of fragrance in past 24 hours | 22 | 1 | 48 | 0.0415 |
Use of paint remover in past week | 82 | 7 | 213 | 0.0288 |
m, p-Xylenes (R2 = 0.05) | ||||
Overall model | Note ...: not applicable | Note ...: not applicable | Note ...: not applicable | <0.0001 |
Presence of garage | 58 | 31 | 90 | 0.0002 |
Number of occupants | 21 | 36 | 3 | 0.0278 |
Renovations in past month | 43 | 7 | 92 | 0.0203 |
Use of fragrance in past 24 hours | 22 | 0 | 48 | 0.0474 |
Use of paint remover in past week | 86 | 8 | 222 | 0.0272 |
Smoking in home every day/almost every day | 20 | -3 | 49 | 0.0904 |
o-Xylene (R2 = 0.06) | ||||
Overall model | Note ...: not applicable | Note ...: not applicable | Note ...: not applicable | <0.0001 |
Presence of garage | 68 | 40 | 103 | <0.0001 |
Number of occupants | 21 | 36 | 1 | 0.043 |
Renovations in past month | 35 | 6 | 73 | 0.0203 |
Use of fragrance in past 24 hours | 22 | 1 | 49 | 0.0384 |
Use of paint remover in past week | 88 | 13 | 213 | 0.0193 |
... not applicable Source: 2009 to 2011 Canadian Health Measures Survey. |
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