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Table 3 RoB of case control studies in the qualitative synthesis based on the Joanna Briggs Institute Critical Appraisal Checklist

From: Allergies/asthma and root resorption: a systematic review

Questions—analytical case control studies Melo et al. [15] Nishioka et al. [11] Owman-Moll et al. [17] Pastro et al. [19] Shim et al. [16]
1—Were the groups comparable other than the presence of disease in cases or the absence of disease in controls? Y Y U Y Y
2—Were cases and control matched appropriately? Y Y U Y Y
3—Were the same criteria used for identification of cases and controls? Y Y Y Y Y
4—Was exposure measured in a standard, valid, and reliable way? Y Y Y Y Y
5—Was exposure measured in the same way for cases and controls? Y U Y Y Y
6—Were confounding factors identified? U Y U U U
7—Were strategies to deal with confounding factors stated? N N N N U
8—Were outcomes assessed in a standard, valid, and reliable way for cases and controls? Y N Y Y N
9—Was the exposure period of interest long enough to be meaningful? Y Y U Y Y
10—Was appropriate statistical analysis used? Y Y U Y U
%Yes/risk 80.0 70.0 40.0 80.0 60.0
Overall Low Low High Low Moderate
  1. Y yes, N no, U unclear, N.A not applicable