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)ORCI value
%%

Smoker11147.231321.8491.120–3.0520.015
Previous smoker3113.22424.70.7070.372–1.3450.290
Years of smoking0.001
 <5 years52.199.3
 5–10 years2912.31313.4
 >10 years9741.32323.7
Quantity of cigarettes 0.502
 <10 cig.2611.11111.3
 10–20 cig.7431.51919.3
 >20 cig.3213.61111.3