Table 1.

Data on the use of alcoholic beverages and the risk of alcohol-related problems. T₀, T₁ = times during which the tests were administered and completed; n° = number; % = percentage; AUDIT-C = Alcohol Use Disorders Identification Test-Concise; CI = Confidence interval.

Sample
T0	n°	%	AUDIT-C Score Index Mean	95% CI
	640	100	2.199	2.199–2.520
Abstainers	173	27.03
Drinkers	467	72.97	3.229	3.072–3.386
Low Risk	298	63.81	2.168	2.069–2.258
Moderate Risk	114	24.41	4.386	4.295–4.477
High Risk	49	10.49	6.592	6.449–6.734
Severe Risk	6	1.28	8.167	7.738–8.595
T1	n°	%	AUDIT-C Score Index Mean	95% CI
	640	100	3.152	2.966–3.337
Abstainers	121	18.91
Drinkers	519	81.09	3.925	3.746–4.104
Low Risk	245	47.21	2.139	2.032–2.245
Moderate Risk	144	27.75	4.340	4.241–4.392
High Risk	99	19.08	6.384	6.286–6.481
Severe Risk	31	5.97	8.258	8.090–8.407