Biomedical Science Letters

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Table. 4.

Complex samples multivariable logistic regression analysis of household PM2.5 levels, distinguishing between concentrations of 35 µg/m3 or less vs. more than 35 µg/m3

Variable Household PM2.5 (≤35 vs. >35 µg/m3)
OR (95% CI)
Crude model P-value Model 1 P-value
Current smoking status
Current 2.099 (1.136 to 3.879) 0.018* 2.253 (1.082 to 4.689) 0.030*
Non-current 1 1
Atmospheric PM2.5
3rd tertile 2.547 (1.030 to 6.298) 0.043* 2.496 (0.957 to 6.508) 0.061
2nd tertile 1.359 (0.505 to 3.663) 0.541 1.210 (0.437 to 3.350) 0.712
1st tertile 1 1
Floor level
3rd tertile 0.701 (0.258 to 1.901) 0.483 0.682 (0.261 to 1.782) 0.432
2nd tertile 0.762 (0.325 to 1.786) 0.529 0.767 (0.331 to 1.775) 0.533
1st tertile 1 1
Residential floor area
3rd tertile 0.248 (0.096 to 0.640) 0.004* 0.219 (0.074 to 0.647) 0.006*
2nd tertile 0.327 (0.149 to 0.717) 0.006* 0.280 (0.126 to 0.621) 0.002*
1st tertile 1 1
Use of humidifier
Yes 1.185 (0.561 to 2.501) 0.654 1.628 (0.723 to 3.662) 0.237
No 1 1
Cooking activity status
Yes 2.573 (0.334 to 19.834) 0.362 1.521 (0.204 to 11.316) 0.681
No 1 1
Residential zoning area
Residential zone 4.956 (1.177 to 20.863) 0.029* 8.667 (1.628 to 46.148) 0.012*
Urban in non-residential zone 10.423 (1.505 to 72.173) 0.018* 11.053 (1.285 to 95.087) 0.029*
Rural in non-residential zone 1 1

Model 1: adjusting for age, sex, education level, recent home repair, presence of pet, house cleaning, use of insecticide, use of air freshener, use of air purifier, living room-kitchen separation, window opening or closing status.

PM2.5, particulate matter 2.5; OR, odds ratio; CI, confidence interval.

*P < 0.05, **P < 0.001.

Biomed Sci Letters 2024;30:264-75 https://doi.org/10.15616/BSL.2024.30.4.264
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