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 |