Table 4

Association between smoking-related thoughts/microbehaviours and sustained abstinence among those who had made quit attempts—generalised estimating equations (GEE) modelling results

	Per centage of achieving sustained abstinence	Individual predictor analysis† (1843 observations from 1553 individuals‡)		Intermediate step (1840 observations from 1548 individuals‡)		Fully adjusted analysis† (1674 observations from 1415 individuals‡)
	Per centage of achieving sustained abstinence	Adjusted odds ratio	95% CI	Adjusted odds ratio	95% CI	Adjusted odds ratio	95% CI
Thinking about harm to you
Never/don't know	28.1	Ref		Ref		Ref
Occasionally	15.4	0.89	0.63 to 1.25	0.84	0.57 to 1.24	0.89	0.57 to 1.35
Often	21.1	0.78	0.56 to 1.08	0.83	0.55 to 1.23	0.84	0.54 to 1.29
Harm to others
Never/don't know	24.5	Ref		Ref		Ref
Occasionally	15.9	1.15	0.82to 1.57	1.20	0.84 to 1.72	1.13	0.76 to 1.69
Often	21.0	0.84	0.62 to 1.16	0.92	0.63 to 1.33	0.79	0.53 to 1.19
Cost of smoking
Never/don't know	13.9	Ref		Ref		Ref
Occasionally	18.8	1.25	0.94 to 1.67	1.34	0.99 to 1.80	1.39	1.01 to 1.93*
Often	38.4	0.98	0.69 to 1.39	1.01	0.90 to 1.47	1.20	0.79 to 1.82
Seriously consider quitting
Never/don't know	4.6	Ref		Ref		Ref
Occasionally	3.8	0.70	0.52 to 0.93*	0.67	0.49 to 0.91*	0.83	0.58 to 1.17
Often	4.6	0.84	0.63 to 1.14	0.87	0.62 to 1.22	0.81	0.53 to 1.22
Butting out
No	4.1	Ref		Ref		Ref
Yes	4.2	0.93	0.74 to 1.18	0.97	0.75 to 1.26	0.84	0.63 to1.12
Forgoing
Never	4.4	Ref		Ref		Ref
At least once	3.5	1.05	0.80 to 1.37	1.14	0.86 to 1.54	1.23	0.89 to 1.72

*Significant at p<0.05;**p<0.01;***p<0.001.
†In ‘individual indicator analysis’ only one smoking-related thought/microbehaviour variable (predictor variable) was included (controlled for city of residence, age, sex, ethnicity, marital status, highest level of education attained, annual household income, cohort and wave); in ‘intermediate step’, all predictor variable listed in the table were included (and controlled for all the covariates as in ‘individual predictor analysis’); whereas in ‘fully adjusted analysis’ we further added the following smoking-related variables: Heaviness of Smoking Index (HSI), self-efficacy of quitting, length of last serious quit attempt and intention to quit.
‡The number in some analyses was slightly less due to missing cases.
Ref: reference value.