Table 4 Effect of the association of CHD with indoor air pollutant exposure levels by stratified status of house renovation, smoke ventilator usage and exposure to environmental pollutants near the residence
Living in a newly renovated house | Use of smoke ventilators when cooking | Exposure to environmental pollutants near the residence | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
No (n = 84) | Yes (N = 35) | No (n = 32) | Yes (N = 87) | None (n = 64) | Heavy-traffic road (N = 43) | |||||||
N, controls/cases | AORa | N, Controls/cases | AORa | N, controls/cases | AORb | N, controls/cases | AORb | N, controls/cases | AORc | N, controls/cases | AORc | |
TVOC | ||||||||||||
Low (≤ 0.30 mg/m3) | 42/12 | Reference | 15/4 | Reference | 12/7 | Reference | 45/9 | Reference | 39/5 | Reference | 16/8 | Reference |
High (> 0.30 mg/m3) | 12/18 | 5.43 (1.44–20.55) | 6/10 | 9.23 (1.17–73.00) | 2/11 | 13.10 (0.73–234.81) | 16/17 | 5.19*(1.50–17.93) | 8/12 | 31.37* (3.21–306.6) | 9/10 | 2.65 (0.57–12.35) |
Formaldehyde | ||||||||||||
Low (≤ 0.03 mg/m3) | 37/21 | Reference | 14/11 | Reference | 9/11 | Reference | 42/21 | Reference | 30/13 | Reference | 18/13 | Reference |
High (> 0.03 mg/m3) | 17/9 | 1.68 (0.45–6.23) | 7/3 | 0.50 (0.06–4.10) | 5/7 | 0.68 (0.06–8.31) | 19/5 | 0.72 (0.18–2.84) | 17/4 | 0.40 (0.06–2.78) | 7/5 | 0.76 (0.12–5.03) |
PM2.5 | ||||||||||||
Low (≤ 13 µg/m3) | 40/16 | Reference | 12/11 | Reference | 6/13 | Reference | 46/14 | Reference | 29/13 | Reference | 20/8 | Reference |
High (> 13 µg/m3) | 14/14 | 2.32 (0.70–7.75) | 9/3 | 0.53 (0.09–3.33) | 8/5 | 0.16 (0.01–1.83) | 15/12 | 4.27 (1.22–14.94) | 18/4 | 0.01 (0–1.16) | 5/10 | 6.97(1.26–38.38) |
PM10 | ||||||||||||
Low (≤ 14 µg/m3) | 40/16 | Reference | 12/10 | Reference | 6/12 | Reference | 46/14 | Reference | 29/13 | Reference | 20/8 | Reference |
High (> 14 µg/m3) | 14/14 | 2.32 (0.70–7.75) | 9/4 | 0.53 (0.09–3.33) | 8/6 | 0.16 (0.01–1.83) | 15/12 | 4.27 (1.22–14.94) | 18/4 | 0.01 (0–1.16) | 5/10 | 6.97(1.26–38.38) |