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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Addiction. 2018 Oct 16;114(2):294–303. doi: 10.1111/add.14446

Table 3. Prevalence of e-cigarette use among past-year smokers in England 2014-2017 stratified SES group.

Overall
(N=16104)		 2014
(N=4252)		 2015
(N=4201)		 2016
(N=3967)		 2017
(N=3684)
SES group
AB
(N=2063) ref		 1.00
-		 1.00
-		 1.00
-		 1.00
-		 1.00
-
C1
(N=4437)		 0·83
(0·64-1·07)		 0·83
(0·65-1·08)		 0·90
(0·70-1·16)		 0·96
(0·75-1·23)		 0·88
(0·68-1·13)
C2
(N=3712)		 0·70*
(0·54-0·91) 		0·70*
(0·54-0·91) 		0·72
(0·56-0·94) 		0·92
(0·72-1·19)		 0·91
(0·69-1·19)
D
(N=3144)		 0·53***
(0·40-0·71) 		0·53***
(0·49-0·70) 		0·85
(0·66-1·11)		 0·70
(0·53-0·93) 		0·71
(0·53-0·96)
E
(N=2775)		 0·67*
(0·50-0·89) 		0·67*
(0·50-0·89) 		0·57***
(0·43-0·75) 		0·64*
(0·48-0·85) 		0·91
(0·68-1·22)

Ns are not weighted. Results for prevlance of e-cigarette use are presented as Odds Ratios (95% CI) against the indicated referent. <0·05 p values are indicated in bold· *p<0·01, **p<0·001, ***p<0.0001.