Table 3

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

Baseline scan result		Quit smoking	Total	Univariable OR (95% CI)	Multivariable OR^† (95% CI)
ITT 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)
Complete case 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)

*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.