Table 3

Impact of baseline scan result on smoking cessation at T1 (2 weeks) and T2 (2 years) follow-up

Baseline scan resultQuit smokingTotalUnivariable OR (95% CI)Multivariable OR (95% CI)
ITT analysis*
T1 Control group36786ReferenceReference
Negative result‡263401.73 (1.02 to 2.91)1.78 (1.04 to 3.05)
Additional investigation‡484162.72 (1.73 to 4.26)2.85 (1.79 to 4.53)
T2 Control group79775ReferenceReference
Negative result‡323380.92 (0.60 to 1.42)0.90 (0.58 to 1.40)
Additional investigation‡834092.24 (1.60 to 3.14)2.29 (1.62 to 3.22)
Complete case analysis
T1 Control group36479ReferenceReference
Negative result262271.59 (0.94 to 2.71)1.61 (0.93 to 2.77)
Additional investigation‡482992.35 (1.49 to 3.72)2.46 (1.53 to 3.96)
T2 Control group79377ReferenceReference
Negative result322120.67 (0.43 to 1.05)0.65 (0.41 to 1.04)
Additional investigation‡832751.63 (1.14 to 2.33)1.66 (1.15 to 2.39)
  • *Primary intention to treat (ITT) analysis using the imputed population.

  • †Adjusted for T0 cancer distress, recruitment site, gender, age, marital group, deprivation and experience of lung cancer.

  • ‡One participant removed due to protocol deviation.