Characteristics of the study population and predictors for continuous abstinence
| Characteristics | OR for successful quitting | |||
| Control, n (%) | SMD, n (%) | Initial analyses OR (95% CI) | Multivariate analyses OR (95% CI) | |
| Adjusted for cluster | ||||
| Smokers with a mental disorder | ||||
| No mental disorder | 29 783 (80.6) | 1 | 1 | |
| Yes, SMD | 7162 (19.4) | 0.68 (0.63 to 0.73)* | 0.74 (0.68 to 0.80)* | |
| Participants | ||||
| Age (years) | ||||
| 18–24 | 1304 (4.4) | 389 (5.4) | 1 | 1 |
| 25–34 | 3423 (11.5) | 1064 (14.9) | 1.50 (1.27 to 1.78)* | 1.33 (1.10 to 1.61)* |
| 35–44 | 5661 (19) | 1388 (19.4) | 1.54 (1.31 to 1.81)* | 1.37 (1.14 to 1.64)* |
| 45–54 | 7579 (25.5) | 1877 (26.2) | 1.59 (1.36 to 1.87)* | 1.47 (1.23 to 1.76)* |
| 55–64 | 7098 (23.8) | 1668 (23.3) | 1.70 (1.45 to 1.99)* | 1.53 (1.28 to 1.84)* |
| 65+ | 4718 (15.8) | 776 (10.8) | 1.61 (1.37 to 1.90)* | 1.30 (1.07 to 0.57)* |
| Sex | ||||
| Men | 12 278 (41.2) | 2937 (41) | 1 | 1 |
| Women | 17 505 (58.8) | 4225 (59) | 0.87 (0.83 to 0.92)* | 0.85 (0.80 to 0.90)* |
| Disadvantaged smoker† | ||||
| No | 18 451 (62) | 2746 (38.3) | 1 | 1 |
| Yes | 10 178 (34.2) | 4128 (57.6) | 0.79 (0.74 to 0.83)* | 0.84 (0.79 to 0.89)* |
| Heavy smoker‡ | ||||
| No | 7032 (23.6) | 1243 (17.4) | 1 | 1 |
| Yes | 22 044 (74) | 5770 (80.6) | 0.69 (0.64 to 0.73)* | 0.74 (0.69 to 0.80)* |
| Compliance with programme§ | ||||
| No | 10 661 (35.8) | 3393 (47.4) | 1 | 1 |
| Yes | 18 712 (62.8) | 3684 (51.4) | 3.32 (3.12 to 3.53)* | 3.26 (3.05 to 3.48)* |
| Living with a smoker | ||||
| No | 19 389 (65.1) | 5168 (72.2) | 1 | 1 |
| Yes | 10 129 (34) | 1917 (26.8) | 0.90 (0.86 to 0.96)* | 0.90 (0.85 to 0.96)* |
| Earlier quit attempts | ||||
| No | 11 227 (37.7) | 2985 (41.7) | 1 | 1 |
| Yes | 17 966 (60.3) | 4001 (55.9) | 1.09 (1.04 to 1.15)* | 1.03 (0.98 to 1.10) |
| Recommendation by healthcare staff¶ | ||||
| No | 11 322 (38) | 2162 (30.2) | 1 | 1 |
| Yes | 17 078 (57.3) | 4690 (65.5) | 0.86 (0.81 to 0.91)* | 0.89 (0.84 to 0.95) * |
| Smoking cessation clinic | ||||
| Setting | ||||
| Municipality | 22 653 (76.1) | 5636 (78.7) | 1 | 1 |
| Pharmacy | 4522 (15.2) | 938 (13.1) | 1.06 (0.98 to 1.13) | 1.02 (0.90 to 1.15) |
| Hospital (including midwives) | 1943 (6.5) | 514 (7.2) | 1.02 (0.92 to 1.13) | 1.13 (0.94 to 1.36) |
| Other | 665 (2.2) | 74 (1) | 0.99 (0.83 to 1.20) | 1.05 (0.81 to 1.38) |
|
Smoking cessation intervention | ||||
| Programme format | ||||
| Group | 24 925 (83.7) | 5347 (74.7) | 1 | 1 |
| Individual | 4858 (16.3) | 1813 (25.3) | 1.30 (1.21 to 1.39)* | 1.17 (1.07 to 1.28)* |
| Cluster | ||||
| Smoking cessation clinic | 0.05 (0.03 to 0.08)* | |||
The initial analyses were adjusted for sex and age only. In addition to the listed predictors, the multivariable model was adjusted for the year of intervention and hierarchical clustering (smoking cessation clinic).
The results were reported as ORs and 95% CIs.
*P value <0.05 (considered statistically significant).
†Disadvantaged: ≤12 years of school and/or unemployed.
‡Heavy smoker: ≥20 pack years, Fagerström score of ≥7 points and/or daily consumption of ≥20 cigarettes.
§Compliance: attended ≥75% of the planned meeting sessions.
¶Healthcare staff: doctors, nurses, nurses’ assistants, midwives, etc.
SMD, severe mental disorder.