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Table 2. Quality assessment scores for the selected studies based on the quality of genetic association studies (Q-Genie)

From: Influence of heritability on occlusal traits: a systematic review of studies in twins

  Items
1 2 3 4 5 6 7 8 9 10 11 Score
Kučević et al. 2017 [19] 5 5 2 NA NA 2 2 5 5 2 5 33
Sidlauskas et al. 2016 [20] 6 6 5 NA NA 4 2 6 7 6 6 48
Švalkauskienė et al. 2015 [10] 6 6 5 NA NA 3 2 6 6 6 6 46
Kawala et al. 2007 [13] 3 3 4 NA NA 3 2 3 4 5 5 32
Eguchi et al. 2004 [7] 6 6 4 NA NA 4 2 5 6 6 6 45
Richards et al. 1990 [21] 6 6 4 NA NA 4 2 6 6 3 5 42
Boraas et al. 1988 [22] 6 6 5 NA NA 5 2 7 6 6 6 49
Sharma et al. 1986 [23] 6 7 4 NA NA 3 2 6 6 6 5 45
Potter et al. 1981 [24] 5 6 4 NA NA 3 2 6 6 6 5 43
Corruccini et al. 1980 [17] 6 6 4 NA NA 4 2 6 6 6 5 45
  1. 1 rationale for study, 2 selection and definition of outcome of interest, 3 selection and comparability of comparison group (if applicable), 4 technical classification of the exposure, 5 non-technical classification of the exposure, 6 other sources of bias, 7 sample size and power, 8 a priori planning of analysis, 9 statistical methods and control for confounding, 10 testing of assumptions and inferences for genetic analysis, 11 appropriateness of inferences drawn from results. All items have a maximum score of 7. NA not applicable
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