Table 2.

Quality of the papers included in the systematic review and meta-analysis

Quality variable	Quality variable categories	Number of studies	Proportion (%)
Sampling	Non probability	14	25.0
	Probability	42	75.0
Alcohol use information collection	Breathalyser	2	3.6
	Alcohol Use Disorder Identification Test	2	3.6
	CAGE	6	10.7
	Other self-reports	46	82.1
Response rate	Between 60 and 80%	6	10.7
	Above 80%	33	58.9
	Not reported	17	30.4
Interview modality	Face to face	36	64.3
	Self-administered	20	35.7