Smoking behaviour, mental health, harmful alcohol use, and occupation categories in univariated and multivariated conditional regression models
| Univariated | Multivariated | |||||
|---|---|---|---|---|---|---|
| Cases | Controls | OR (CI 95%) | p Value | aOR (CI 95%) | p value | |
| Smoking habits | ||||||
| Median (IQR) age at beginning (years) | 17 (15–20) | 18 (15–20) | 1.5 (1.0 to 2.4)* | 0.06 | 2.1 (1.1 to 4.0)* | 0.02 |
| Median (IQR) number of packs per day | 1 (1–1.8) | 1 (1–1.5) | 3.9 (1.2 to 12.7)† | 0.02 | 8.5 (1.9 to 38.4)† | 0.006 |
| Nb of brand median (IQR) | 2 (1–3) | 2 (2–3) | 0.9 (0.7 to 1.2) | 0.39 | – | – |
| Breaks median (IQR) | 1 (0–2) | 2 (1–3) | 0.7 (0.5 to 1) | 0.03 | – | – |
| Nb patients smoking unfiltered cigarettes | 20 (41) | 9 (18) | 3.2 (1.2 to 8.7) | 0.02 | 4.2 (1.1 to 16.0) | 0.04 |
| Nb patients smoking low tar cigarettes | 7 (14) | 17 (35) | 0.3 (0.1 to 0.9) | 0.03 | – | – |
| Mental health and harmful alcohol use | ||||||
| Harmful alcohol use‡ | 25 (51) | 10 (20) | 3.5 (1.4 to 8.7) | 0.007 | 4.6 (1.2 to 17.2) | 0.02 |
| Other psychiatric condition§ | 22 (45) | 14 (29) | 1.7 (0.8 to 3.7) | 0.18 | – | – |
| On psychotropic medication¶ | 33 (67) | 20 (41) | 2.4 (1.1 to 5.3) | 0.02 | – | – |
| Occupation | ||||||
| Unemployment | 17 (35) | 12 (24) | 1.7 (0.7 to 4.3) | 0.26 | – | – |
Values are numbers (percentage) unless stated otherwise.
*For every 2 years younger than 22 years.
†For every 10 cigarettes more than 20.
‡More than 14 drinks/week for women, more than 21 drinks/week for men associated with alcohol withdrawal or documented complications.
§According to the medical chart and DSM-IV criteria.
¶Antidepressant, anxiolytic, neuroleptic and antiepileptic (used as mood stabiliser) drug.
aOR, adjusted OR; DSM-IV, Diagnostic and Statistical Manual of Mental Disorders.