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Table 3 ROB-1 Cochrane evaluation

From: Periodontal effects of maxillary expansion in adults using non-surgical expanders with skeletal anchorage vs. surgically assisted maxillary expansion: a systematic review

DOMAIN SELECTION BIAS PERFORMANCE BIAS DETECTION BIAS ATTRITION BIAS REPORTING BIAS OTHER BIAS
ITEM Sequence generation Allocation concealment Blinding of participants and personnel Blinding of outcome assessment Incomplete outcome data Selective outcome reporting Other sources of bias
Author, year Evaluation Valuation support Evaluation Valuation support Evaluation Valuation support Evaluation Valuation support Evaluation Valuation support Evaluation Valuation support Evaluation Valuation support
Kayalar 201 6[21] Low risk Randomization was performed using computer-generated tables. Low risk Allocation was concealed using sequentially numbered opaque and sealed envelopes. Unclear risk Although blinding was probably not possible, author does not mention information on this topic anywhere Unclear risk Author does not mention information on this topic anywhere Unclear risk No serious adverse effects were observed but no information about participant continuation or losses was reported Low risk Principal study outcomes were found in results section (skeletal expansion, dental expansion, periodontal side effects (dental tipping, root resorption, and buccal bone resorption) Low risk The study appears to be free of other sources of bias