Table 1

Prevalence of smoking status from 2002 to 2015 (The National Survey on Drug Use and Health, aged 12+)

Smoking status	2002*	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	Linear trend (13 year increment)
Smoking status	Prevalence of each smoking status (weighted %)														Unadjusted OR(95% Cl)	T-test (p value)
Current smokers (combined daily and non-daily smokers) (%)	26.00	25.38	25.02	25.15	25.04	24.17	23.85	23.57	23.09	22.04	22.18	21.15	21.03	19.48	0.72 (0.70,0.74)	t=−21.37 (0.0000)
Former daily smokers (not smoked past month) (%)	1.94	1.79	1.84	1.69	1.84	1.85	1.73	1.82	1.78	1.66	1.65	1.81	1.77	1.70	0.92 (0.84,1.02)	t=−1.62 (0.1071)
Former daily smokers (not smoked past year) (%)	16.61	16.62	16.10	15.42	15.71	15.97	16.12	15.37	15.81	15.45	15.98	15.71	15.73	15.54	0.95 (0.91,0.98)	t=−2.75 (0.0066)
Former non-daily smokers (not smoked past month) (%)	24.61	24.85	24.50	24.07	23.61	23.27	23.44	24.06	23.63	23.60	22.13	23.21	22.75	21.52	0.87 (0.85, 0.89)	t=−10.29 (0.0000)
Never smoker (%)	30.84	31.35	32.54	33.67	33.80	34.74	34.86	35.18	35.69	37.26	38.08	38.12	38.71	41.77	1.50 (1.46, 1.54)	t=28.82 (0.0000)
Total sample (N)	54 079	55 230	55 602	55 905	55 279	55 435	55 110	55 234	57 313	58 397	55 268	55 160	55 271	57 146