Table 2
Contribution of predictors to log-transformed indoor BTEX concentrations, household population aged 3 to 79, Canada, 2009 to 2011

Table 2
Contribution of predictors to log-transformed indoor BTEX concentrations, household population aged 3 to 79, Canada, 2009 to 2011
Table summary
This table displays the results of contribution of predictors to log-transformed indoor btex concentrations. The information is grouped by btex component / predictors (appearing as row headers), % change, 95% confidence interval and p-value, calculated using from and to units of measure (appearing as column headers).
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
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