Table 2.

Quit attempts, recent quitting and net quitting by reason for switching to a “lighter” cigarette^*†

	Percentage of cases (n = 30 800)	Made a quit attempt between 2002– 2003 (n = 30 800)			Recent quitting (≥90 day abstinence when surveyed among those who made a quit attempt) (n = 13 484)			Net quitting (% of all smokers who recently quit) (n = 30 800)
		%	p Value	Adjusted odds ratio	%	p Value	Adjusted odds ratio	%	p Value	Adjusted odds ratio
Overall switching:
Did not switch* (reference group for all analyses)	61	41	–	Reference	17	–	Reference	7	–	Reference
Switched	39	51	0.001	1.58 (1.48 to 1.69)	9	<0.001	0.40 (0.35 to 0.45)	4	<0.001	0.54 (0.47 to 0.61)
Reason for switching (among the 12 009 who switched):
Sole reasons:
Quit smoking	7	71	<0.001	3.60 (3.00 to 4.32)	6	<0.001	0.30 (0.20 to 0.45)	4	0.016	0.54 (0.36 to 0.83)
Harm reduction	8	40	0.699	1.09 (0.91 to 1.31)	18	0.680	0.97 (0.69 to 1.35)	7	0.801	0.99 (0.71 to 1.37)
Flavour	26	40	0.476	0.95 (0.85 to 1.06)	10	<0.001	0.43 (0.34 to 0.54)	4	<0.001	0.45 (0.36 to 0.57)
Multiple reasons:
Quit smoking and harm reduction	10	66	<0.001	3.04 (2.61 to 3.54)	9	<0.001	0.43 (0.32 to 0.58)	6	0.148	0.78 (0.58 to 1.04)
Quit smoking and flavour	8	68	<0.001	2.78 (2.29 to 3.38)	5	<0.001	0.20 (0.12 to 0.33)	3	0.004	0.34 (0.21 to 0.55)
Harm reduction and flavour	15	36	0.002	0.88 (0.78 to 1.11)	9	<0.001	0.42 (0.31 to 0.58)	3	<0.001	0.41 (0.30 to 0.56)
Quit smoking and harm reduction and flavour	18	64	<0.001	2.66 (2.40 to 2.95)	7	<0.001	0.31 (0.24 to 0.40)	4	0.001	0.52 (0.40 to 0.68)
Other reason(s)	8	39	0.378	1.03 (0.89 to 1.19)	11	0.004	0.53 (0.37 to 0.76)	4	<0.001	0.58 (0.41 to 0.82)

^*Non-switchers are the reference group for all analyses;

^†adjusted odds ratio (adjusted for age, race, gender, education, time to first cigarette, cigarettes per day, type of cigarette smoked regularly).