Approach | Unadjusted difference (95% CI) | Adjusted difference (95% CI) |
---|---|---|
Regression | −0.1 (−2.5 to 2.3) | −0.6 (−4.4 to 3.2)* |
PSM | 0.9 (−2.2 to 3.9) | 1.1 (−2.0 to 4.1)† |
Reducers were coded as ‘1’ and smokers as ‘0’.
*FTND, treatment status, age, sex and trial.
†Age and sex.
FTND, Fagerström Test of Nicotine Dependence; PSM, propensity score matching.