Table 2

Impact of baseline scan result on T₁ and T₂ smoking cessation

Baseline scan result		Quit smoking	Total	Univariable OR (95% CI)	Multivariable OR* (95% CI)
Primary analysis†
T₁	Control group	36	786	–Reference–	–Reference–
	Negative result‡	26	340	1.73 (1.02 to 2.91)	1.78 (1.04 to 3.05)
	Additional investigation‡	48	416	2.72 (1.73 to 4.26)	2.85 (1.79 to 4.53)
T₂	Control group	79	775	–Reference–	–Reference–
	Negative result‡	32	338	0.92 (0.60 to 1.42)	0.90 (0.58 to 1.40)
	Additional investigation‡	83	409	2.24 (1.60 to 3.14)	2.29 (1.62 to 3.22)
Sensitivity analysis§
T₁	Control group	36	479	–Reference–	–Reference–
	Negative result	26	227	1.59 (0.94 to 2.71)	1.61 (0.93 to 2.77)
	Additional investigation‡	48	299	2.35 (1.49 to 3.72)	2.46 (1.53 to 3.96)
T₂	Control group	79	377	–Reference–	–Reference–
	Negative result	32	212	0.67 (0.43 to 1.05)	0.65 (0.41 to 1.04)
	Additional investigation‡	83	275	1.63 (1.14 to 2.33)	1.66 (1.15 to 2.39)

*Adjusted for T₀ cancer distress, recruitment site, gender, age, marital group, deprivation and experience of lung cancer.
†Intention-to-treat (ITT) analyses with the imputed population.
‡One participant removed due to protocol deviation.
§Complete case analyses.