Patients' and controls' characteristics, by environmental tobacco smoke (ETS) exposure status
| Patients (n=848) | Controls (n=1078) | |||
|---|---|---|---|---|
| ETS | Yes (n=731, 86%) | No (n=117, 14%) | Yes (n=605, 56%) | No (n=473, 44%) |
| *p< 0.05;**p<0.01 | ||||
| †See text for definition | ||||
| Never smokers | 197 (71%) | 82 (29%)** | 167 (30%) | 400 (70%)** |
| Current/former smokers | 534 (94%) | 35 (6%)** | 438 (86%) | 73 (14%)** |
| Prevalence of cardiovascular risk factors within passive smoking group | ||||
| Age (years) | 59±10 | 61±10 | 60±10 | 61±9 |
| Male sex | 592 (81%) | 94 (80%) | 478 (79%) | 383 (81%) |
| Hypertension† | 336 (46%) | 51 (44%) | 151 (25%) | 123 (26%) |
| Hypercholesterolaemia† | 468 (64%) | 72 (62%) | 199 (33%) | 147 (31%) |
| Diabetes mellitus† | 182 (25%) | 30 (26%) | 42 (7%) | 28 (6%) |
| Physical inactivity† | 489 (67%) | 71 (61%) | 345 (57%) | 231 (49%) |
| Obesity† | 468 (64%) | 71 (61%) | 224 (37%) | 179 (38%) |
| Years of education | 9±3 | 11±3* | 11±4 | 13±3* |
| Depression† | 124 (17%) | 22 (19%) | 54 (9%) | 33 (7%) |
| Income ('000 US$) | 7.25 | 7.12 | 8.23 | 8.57 |