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Table 3 Summary of quality assessment for case–control studies

From: Relationship between alcohol-attributable disease and socioeconomic status, and the role of alcohol consumption in this relationship: a systematic review and meta-analysis

Study, Year Selection Comparability Exposure QA score
1 2 3 4 5a 5b 6 7 8
Boing et al., 2011 [13] * * * * 5
Brown et al., 2001 [19] * * * * * * * 7
Brown et al., 2005 [31] * * * * * * 6
Conway et al., 2010 [14] * * * * * * * 7
Day et al., 1993 [15] * * * * * 5
Gammon et al., 1997 [20] * * * * * * 6
Greenberg et al., 1991 [16] * * * * * 5
Kropp et al., 2001 [24] * * * * * * * 7
Kruk et al., 2007 [25] * * * * * * * 7
Martin-Moreno et al., 1993 [27] * * * * * * * 7
Mattioli et al., 2005 [42] * * * * * * 6
Menvielle et al., 2004 [17] * * * * * * * 7
Petrovski et al., 2011 [43] * * * * * 5
Radi et al., 2005 [41] * * * * * 5
Robert et al., 2004 [29] * * * * * * * 7
Sharp et al., 2001 [21] * * * * * * 6
Zatonski et al., 1991 [18] * * * * * * * 7
  1. *, criteria met. , criteria not met. 1, Yes, independent validation. 2, Consecutive or obviously representative series of cases. 3, Community controls. 4, No history of disease (endpoint). 5a, Yes (age, sex, alcohol & SES). 5b, Yes (additional e.g. lifestyle factors). 6, Secure record, or structured interview where blind to case/control status. 7, Yes, same method. 8, Same rate for both groups.