Predictors of sustained smoking cessation
| Crude OR (95%CI) | p Value | Adjusted OR (95%CI)3-150 | p Value | |||
|---|---|---|---|---|---|---|
| Nicotine patch | 1.50 (1.15 to 1.96) | < 0.01 | 1.47 (1.11 to 1.96) | < 0.01 | ||
| Age (categorised as decades) | 1.02 (1.01 to 1.03) | < 0.001 | 1.17 (1.03 to 1.31) | < 0.05 | ||
| Sex (menv women) | 1.38 (1.14 to 1.68) | < 0.001 | 1.52 (1.22 to 1.88) | < 0.001 | ||
| Age started smoking | 1.00 (0.98 to 1.03) | NS | – | – | ||
| Parental smoking3-151 | 0.99 (0.76 to 1.28) | NS | – | – | ||
| Cigarettes per day (categorised) | 0.79 (0.69 to 0.90) | < 0.001 | 0.80 (0.69 to 0.93) | < 0.01 | ||
| Number attempts to quit | 0.99 (0.96 to 1.02) | NS | – | – | ||
| Respiratory disease3-151 | 0.79 (0.67 to 0.92) | < 0.01 | – | – | ||
| Cardiac disease3-151 | 0.46 (0.28 to 0.75) | < 0.01 | – | – | ||
| Respiratory or cardiac disease3-151 | 0.73 (0.60 to 0.89) | < 0.001 | 0.75 (0.60 to 0.93) | < 0.01 | ||
| Other chronic disease3-151 | 0.95 (0.73 to 1.24) | NS | – | – | ||
| History of depression3-151 | 0.82 (0.59 to 1.15) | NS | – | – | ||
| Other smokers in household3-151 | 1.03 (0.85 to 1.25) | NS | – | – | ||
| Socioeconomic status | ||||||
| Housing conditions | ||||||
| Owned home | 1.62 (1.32 to 1.98) | < 0.001 | – | – | ||
| Years in present home | 1.20 (1.09 to 1.32) | < 0.001 | – | – | ||
| Composite housing variable3-152 | 1.43 (1.25 to 1.65) | < 0.001 | 1.29 (1.11 to 1.51) | < 0.001 | ||
| Education | 1.09 (0.91 to 1.30) | NS | – | – | ||
| Employment | 0.96 (0.74 to 1.23) | NS | – | – | ||
| Test for nicotine dependence | 0.92 (0.86 to 0.99) | < 0.05 | – | – | ||
| Expired CO | 0.98 (0.97 to 0.99) | < 0.001 | 0.86 (0.77 to 0.94) | < 0.01 | ||
| Blood nicotine (unit/10) | 0.98 (0.97 to 0.99) | < 0.01 | – | – | ||
| Blood cotinine (unit/100) | 0.99 (0.99 to 1.00) | < 0.01 | – | – | ||
↵3-150 Multivariable model adjusted for all predictor variables showing an association with the outcome variable p < 0.10. Respiratory and/or cardiac disease was included in the model as a single variable. Housing conditions were included in the model as composite variable. Test for nicotine dependence and blood nicotine/cotinine were not included in the model because of colinearity with expired carbon dioxide (CO).
↵3-151 Present v absent.
↵3-152 Housing conditions as a composite variable including owned home, years in present home, and person per room ratio (see text for details).