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Table 3 Quality assessment of included cohort studies

From: A comparison of treatment effectiveness between clear aligner and fixed appliance therapies

Reference Selection Comparability Outcome Total score
Representativeness of the exposed cohort Selection of the non-exposed cohort Ascertainment of exposure Demonstration that outcome of interest was not present at start of study Comparability of cohorts on the basis of the design or analysis Assessment of outcome Was follow-up long enough for outcomes to occur Adequacy of follow up of cohorts
Djeu2005 * * * * * * * * 8
Kuncio2007 * * * * ** * *   8
Pavoni2011   * * *   * * * 6
Grunheid2016   * * * ** * * * 8
Gu2017 * * * * * * * * 8
Lanteri2018   * * * ** * * * 8