Table 2

Prevalence of categories of unbranded illicit tobacco use among cigarette smokers—percentages and results of logistic regression model

Time period	Differences between PP phases—unadjusted models†			Differences between PP phases—adjusted models†‡			Linear trend during PP—adjusted models
Time period	Per cent	OR	95% CI	Per cent	OR	95% CI	OR
Regular unbranded use
Pre-PP	0.1	1.00		0.1	1.00
Transition	0.4	2.50	0.43 to 14.58	0.4	2.45	0.44 to 13.63
PP	0.2	1.48	0.47 to 4.67	0.2	1.48	0.46 to 4.73	1.03
Current unbranded use
Pre-PP	0.2	1.00		0.2	1.00
Transition	0.1	0.42	0.05 to 3.61	0.1	0.41	0.05 to 3.58
PP	0.4	2.42	0.90 to 6.54	0.4	2.40	0.89 to 6.50	0.90
Nominated as ‘another type of tobacco smoked’ (other unbranded use)
Pre-PP	0.2	1.00		0.2	1.00
Transition	0.1	0.68	0.07 to 6.14	0.1	0.62	0.07 to 5.79
PP	0.3	1.43	0.44 to 4.63	0.3	1.37	0.42 to 4.45	0.94
Purchased unbranded tobacco in the past month
Pre-PP	3.2	1.00		3.2	1.00
Transition	3.0	0.94	0.55 to 1.60	2.9	0.91	0.53 to 1.57
PP	2.1	0.64*	0.45 to 0.91	2.1	0.63*	0.44 to 0.90	0.97
Any unbranded tobacco use§
Pre-PP	3.7	1.00		3.7	1.00
Transition	3.5	0.96	0.59 to 1.57	3.5	0.93	0.57 to 1.53
PP	3.0	0.80	0.58 to 1.09	3.0	0.79	0.58 to 1.08	0.96

*p<0.05.
†Of n=8679 cigarette smokers, we excluded those who did not have SES information (n=199). Analysed n=8480.
‡Model controlled for sex, age group, SES and education.
§Any of the four categories of unbranded use.
PP, plain packaging; SES, socioeconomic status.