Table 5.

Predictors of having quit for at least 6 months since last being surveyed, among those with quit attempts.

	SEIFA Univariate			Model 2			Model 3
	N	OR	95% CI	N	OR	95% CI	N	OR	95% CI
Total N	1332			1283			1217

Index of Relative Socio-Economic Disadvantage (IRSD)
Lowest disadvantage	195	Ref	(p = .057)	189	Ref	(p = .243)	181	Ref	(p = .387)
Low disadvantage	259	0.6	0.3 – 1.1	255	0.7	0.4 – 1.3	243	0.7	0.3 – 1.3
Moderate disadvantage	268	0.7	0.4 – 1.3	254	0.9	0.5 – 1.6	239	0.9	0.5 – 1.8
High disadvantage	292	0.4^**	0.2 – 0.8	284	0.5	0.3 – 1.02	268	0.6	0.3 – 1.2
Highest disadvantage	318	0.8	0.4 – 1.3	301	0.9	0.5 – 1.8	286	1.1	0.6 – 2.1

Main language spoken at home
English				1142	Ref	(p = .875)	1089	Ref	(p = .500)
Not English				141	1.0	0.6 – 1.9	128	1.2	0.7 – 2.4
Equivalized household income
Low				267	Ref	(p = .061)	254	Ref	(p = .160)
Low-moderate^a				204	2.1	1.0 – 4.1	187	1.9	0.9 – 4.0
Moderate				227	1.0	0.5 – 2.2	216	0.8	0.4 – 1.9
High-moderate				249	1.8	0.9 – 3.5	238	1.4	0.7 – 2.8
High				258	2.0^*	1.01 – 3.9	251	1.5	0.7 – 3.2
Not disclosed				78	2.7^*	1.2 – 6.2	71	2.3	0.9 – 5.7
Education
Low				792	Ref	(p = .072)	745	Ref	(p = .566)
Moderate				290	1.5	0.9 – 2.3	278	1.3	0.8 – 2.1
High				201	1.7^*	1.03 – 2.9	194	1.3	0.7 – 2.3
Marital Status
Married				458	Ref	(p = .115)	438	Ref	(p = .120)
Separated/ divorced/ widowed				276	0.6	0.3 – 1.04	262	0.6	0.3 – 1.1
DeFacto				200	1.1	0.6 – 1.9	192	1.2	0.7 – 2.1
Single				349	0.7	0.4 – 1.1	325	0.7	0.4 – 1.3
Age group (years)
18 – 24				194	Ref	(p = .204)	186	Ref	(p = .148)
25 – 39				461	0.7	0.4 – 1.3	442	0.8	0.4 – 1.5
40 – 54^b				411	0.5^*	0.3 – 0.97	393	0.5^*	0.2 – 0.98
55 and older				217	0.6	0.3 – 1.3	196	0.6	0.3 – 1.6
Sex
Female				720	Ref	(p = .836)	679	Ref	(p = .526)
Male				563	1.0	0.7 – 1.4	538	1.1	0.7 – 1.8

Heaviness of Smoking Index
0							226	Ref	(p = .194)
1 to 2							369	0.7	0.4 – 1.2
3 to 4							479	0.5^*	0.3 – 0.9
5 to 6							143	0.5	0.2 – 1.3
Longest prior quit attempt
None							117	Ref	(p < .05)
Under 1 month							304	0.8	0.3 – 2.1
1 month – under 6 months							290	1.5	0.6 – 3.7
6 months or longer							506	1.9	0.9 – 4.3
Quit attempts in the last year?
Yes							726	Ref	(p = .998)
No							491	1.0	0.6 – 1.6
Baseline smoking frequency
Daily							1062	Ref	(p = .541)
Weekly or monthly							155	1.2	0.7 – 2.2
Intention to quit
None							126	Ref	(p = .876)
Beyond 6 months							398	0.8	0.4 – 1.7
Within 6 months							412	0.8	0.4 – 1.7
Within 1 month							281	0.7	0.3 – 1.6
Overall opinion of smoking
Positive or neutral							422	Ref	(p = .080)
Negative							501	1.8^*	1.1 – 3.0
Very negative							294	1.8	0.9 – 3.3
Self-efficacy to quit							1217	1.2	0.999 – 1.4
Expected benefits of quitting							1217	0.9	0.8 – 1.2
Worries about health effects							1217	1.0	0.7 – 1.3
Favourable attitudes to smoking							1217	1.0	0.8 – 1.3
Time (months) since baseline								1.2^***	1.1 – 1.3
Likeihood ratio:				χ²(2) = 83.0, p < .001			χ²(2) = 114.2, p < .001

Note: Overall significance levels for each categorical variable are provided in brackets next to the reference category.

In the postal-area (POA)-level analyses controlling for clustering, this category was significantly different from the reference (p < .05) in the Model 2 analysis.

In the POA-level analyses controlling for clustering, this category was no longer significantly different from the reference category in the Model 3 analysis.

p < .05

^**

p < .01

^***

p < .001.