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Table 2 Quality assessment of included studies using the Newcastle-Ottawa Scale (Case-Control Studies)

From: Compositional alterations of gut microbiota in nonalcoholic fatty liver disease patients: a systematic review and Meta-analysis

First Author Selectiona Comparabilityb Exposurec Score
1 2 3 4 A B C
Caussy [17] 7
Chierico [18] 6
Jiang [19] 7
Li [20] 8
Nistal [21] 7
Özkul [22] 6
Raman [23] 8
Shen [24] 8
Silva [25] 7
Sobhonslidsuk [26] 7
Tsai [27] 7
Wang [28] 8
Wong [29] 8
Yun [30] 7
Zhu [7] 8
  1. Rank by the beginning letter of the first authors
  2. a1: Is the case definition adequate? 2: Representativeness of the cases. 3: Selection of Controls. 4: Definition of Controls
  3. bComparability: Comparability of cases and controls on the basis of the design or analysis. A maximum of two stars can be given for Comparability
  4. cA: Ascertainment of exposure. B: Same method of ascertainment for cases and controls. C: Nonresponse rate
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