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Table 2 Study quality

From: Risk factors for wound complications of closed calcaneal fractures after surgery: a systematic review and meta-analysis

Case–control study Selection Comparability Exposure Total quality score
Adequate definition of cases Representativeness of cases Selection of controls Definition of controls Control for important factors or additional factors Ascertainment of exposure (blinding) Same method of ascertainment for subjects Non-response rate
Wu [14] 1 1 1 1 1 1 1 1 8
Backes [22] 1 1 1 1 1 1 1 1 7
Ding [16] 1 1 1 1 1 1 1 1 8
Hao [17] 0 1 1 1 1 1 0 1 6
Court-Brown [21] 0 1 0 1 1 1 0 1 5
Koski [18] 1 1 1 1 1 1 0 1 7
Al-Mudhaffar [19] 1 1 1 1 1 1 1 1 8
Folk [20] 1 1 1 1 1 1 1 1 8
Cohort study Selection Comparability Outcome Total quality 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 Control for important factors or additional factors Assessment of outcome Follow-up was long enough for outcomes to occur Adequacy of follow up of cohorts
Soni [15] 1 1 1 1 1 1 0 1 7
Assous [23] 1 1 1 1 1 1 0 1 7
  1. Note: A study can be awarded a maximum of 1 point for each numbered item within the Selection and Exposure categories. A maximum of 2 points can be given for Comparability.