Table 1.

Trends in the proportion (%) non-drinking and drinking pattern among 16–24-year olds, HSE 2005–2015^a

	Year											N	p-value trend	% Change 2005–2015
	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015
Types of non-drinkers
All	18	23	18	23	24	26	23	27	28	31	29	9699	p < 0.001	61
Lifetime abstainer	9	14	10	12	13	14	14	16	18	19	17	9699	p < 0.001	89
Ex-drinker	2	2	1	2	2	2	2	2	2	2	2	9699	0.371	0
Occasional drinker	7	7	7	8	9	10	8	9	8	9	10	9699	0.028	43
Not drinking in the last week
Not drinking in the last week	35	42	39	43	42	48	45	48	48	52	50	9489	p < 0.001	43
Not drinking in last week (drinkers only)	22	25	27	28	26	31	29	30	30	34	33	7152	p < 0.001	50
Drinking on heaviest drinking day
Within limits	22	16	19	17	17	14	18	18	19	17	22	9489	0.258	0
Above limit	43	43	43	40	41	38	37	34	33	31	28	9489	p < 0.001	−35
Binge	27	29	33	29	32	24	25	23	22	19	18	9489	p < 0.001	−35

^aFigures in bold indicate statistical significantly different to 2005, for 95% confidence intervals see Additional file 1: Table S1