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Table 2 Reporting quality of key methodologic items (n = 39)

From: A retrospective survey of quality of reporting on randomized controlled trials of metformin for polycystic ovary syndrome

Item Criteria Description Number of positive trials % 95% CI Cohen’s к coefficient 95% CI
8 Randomization Description of the method used to generate the random sequence 26 67 51 to 82 0.83 0.72 to 0.98
9 and 10 Allocation concealment and implementation Description of the method used to implement the random allocation sequence assuring the concealment until interventions are assigned 19 49 31 to 64 0.71 0.55 to 0.94
11 Blinding Whether or not participants, those administering the interventions, or those assessing the outcomes were blinded to group assignment 20 51 27 to 55 0.72 0.48 to 0.95
15 Baseline data An outline of baseline demographic and clinical characteristics of each group 38 97 92 to 100 0.65 0.49 to 0.97
16 Intention-to-treat analysis Number of participants in each group included in each analysis and whether it was done by ‘intention-to-treat’ 17 44 27 to 60 0.92 0.80 to 0.99