Research Article
Impact on the Quality of Life When Living Close to a Municipal Wastewater Treatment Plant
Table 2
Comparison between cases and controls concerning smoking habits.
| Sample characteristics | Cases (235) | Controls (97) | OR | CI | value | | % | | % |
| Smoker | 111 | 47.2 | 31 | 32 | 1.849 | 1.120–3.052 | 0.015 | Previous smoker | 31 | 13.2 | 24 | 24.7 | 0.707 | 0.372–1.345 | 0.290 | Years of smoking | | | | | | | 0.001 | <5 years | 5 | 2.1 | 9 | 9.3 | | | | 5–10 years | 29 | 12.3 | 13 | 13.4 | | | >10 years | 97 | 41.3 | 23 | 23.7 | | | Quantity of cigarettes | | | | | | | 0.502 | <10 cig. | 26 | 11.1 | 11 | 11.3 | | | | 10–20 cig. | 74 | 31.5 | 19 | 19.3 | | | >20 cig. | 32 | 13.6 | 11 | 11.3 | | |
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