Table 1.

Description of included studies.

Study	n	Design	Alcohol	BAC at testing	Hangover measure	Tests used	Cognitive domain	Main finding	Comments
Collins & Chiles, 1979	11	Within‐subjects, laboratory	13 g/kg	< 0.01%	20‐item hangover questionnaire	Choice RT Meter Monitoring Pattern Identification Compensatory Tracking Problem solving	P SA STM DA PS	Non‐significant results
Collins 1980	8	Within‐subjects, laboratory	1.3 g/kg	0.012%	20‐item hangover questionnaire	Tracking task with RT	DA	Non‐significant results
Finnigan et al. 2005	71	2 × 3 mixed design, naturalistic	1.77 g/kg	0%	Subjective feelings questionnaire	Psychomotor vigilance Dual task Probe memory recall	SA DA STM	Non‐significant results	Group impaired in V, post‐hoc significant for ‘acute and hangover’ only
Grange et al. 2016	31	Within‐subjects, naturalistic	1.55 g/kg	0%	AHS	Choice RT	P	Impaired RT	Anecdotal evidence for impaired accuracy
Howland et al. 2010	184–193	Within‐subjects, laboratory	0.99 g/kg	0%	AHS	PVT CPT ADST‐B APASAT VST‐B PMT	SA SA WM WM WM STM	Impaired Non‐significant Non‐significant Non‐significant Impaired Female only impairment
Kim et al. 2003	13	Within‐subjects, naturalistic	1.5 g/kg	< 0.01%	Subjective Hangover Scale	LNNB	Various	Impairments in ‘memory’, ‘Visual’ and ‘intellectual’ components	Excluded from meta‐analysis as components cannot be subcategorized
Kruisselbrink et al. 2006	12	Within‐subjects, laboratory	1.36 g/kg	0%	Rated common symptoms	Choice RT	P	Non‐significant RT Impaired accuracy	Female participants Alcohol g/kg maximum dose
Laurell & Törnros, 1983	22	Within‐subjects, naturalistic	1.25 g/kg	0	Rated severity	Driving ability	RL	Impaired
McKinney et al. 2004	48	Within‐subjects, naturalistic	1.54 g/kg	< 0.01%	Questionnaire on signs & symptoms	Free recall Delayed recognition Simple RT Choice RT	STM LTM P P	Impaired	STM impaired at 9:00 a.m. only, alcohol g/kg averaged male & female
McKinney et al. 2007	78	Mixed design, naturalistic	1.67 g/kg	< 0.01%	Questionnaire on signs & symptoms	Free recall Delayed recognition Simple RT Choice RT	STM LTM P P	Impaired	Stressor between‐subject condition. ES calculated for group effect (hangover/no‐hangover). Alcohol g/kg averaged male & female
McKinney et al. 2012	48	Within‐subjects, naturalistic	1.54 g/kg	< 0.01%	Questionnaire on signs & symptoms	Sustained attention Divided attention Erikson Flanker Stroop Spatial attention	SA DA SelA SelA SpaA	Impaired Non‐significant Impaired Impaired Non‐significant	Alcohol g/kg averaged male & female
Mrysten et al. 1970	15	Within‐subjects, laboratory	1.43 g/kg	< 0.01%	Rated severity	Simple RT Choice RT F‐test Correction test	P P EF SA	All non‐significant except ‘spatial’ factor of F‐test
Rohers et al. 1991	5	Within‐subjects, laboratory	0.8 g/kg	0%	Rated hangover	Divided attention	DA	Impaired tracking, but not RT
Rohsenow et al. 2006	61	2 × 2 mixed, laboratory	1.1 g/kg	< 0.02%	AHS	Simulated ship performance	PS	Non‐significant	Outcome overall time. Alcohol g/kg averaged male & female
Rohsenow et al. 2010	89–95	2 × 2 × 2 mixed, laboratory	1.15 g/kg	0	AHS	PVT CPT ADST‐B APASAT VST‐B PMT	SA SA WM WM WM STM	Impaired Impaired Non‐significant Non‐significant Non‐significant Non‐significant	Alcohol g/kg averaged male & female
Streufert et al. 1995	21	Within‐subjects, laboratory	1 g/kg	0	Drug effects questionnaire	Managerial simulations	EF	Non‐significant	Involved decision making and planning
Törnros & Laurell, 1991	24	Within‐subjects, naturalistic	1.42 g/kg	< 0.02%a	Rated severity	Driving speed	RL	Non‐significant	overall impaired, post‐hoc BAC < 0.02% non‐significant
Verster et al. 2003	48	Within‐subjects, naturalistic	1.4 g/kg	0	Severity scored	Immediate recall Delayed recall Delayed recognition Macworth clock	STM LTM LTM VA	Non‐significant Impaired Non‐significant Non‐significant	46 participants completed memory tasks
Verster et al. 2014	42	Within‐subjects, naturalistic	1.55 g/kg	< 0.01b	Severity scored	Driving ability	RL	Ability impaired Speed non‐significant	Alcohol g/kg averaged male & female

P = psychomotor; SA = sustained attention; DA = divided attention; SelA = selective attention; SpaA = spatial attention; VA = vigilance attention; STM = short‐term memory; LTM = long‐term memory; WM = working memory; PS = problem solving; EF = executive function (non‐specified); RL = ‘real‐life’; AHS = acute hangover scale.

^aBAC > 0.02% at 9 a.m. session;

^bBAC > 0.02% for four participants; however, inclusion did not impact results (correspondence with authors).