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Table 2 Reporting quality of key methodological items (n= 98)

From: Quality of reporting on randomized controlled trials on recurrent spontaneous abortion in China

Item Criteria Description No. of positive trials % Cohen’sкcoefficient 95% CI
9 Allocation concealment Description of the method used to implement the random allocation sequence assuring the concealment until interventions are assigned 1 1 1.00 -
11 Blinding Whether or not participants, those administering the interventions or those assessing the outcomes were blinded to group assignment 1 1 0.68 0.50 to 0.96
16 Intention-to-treat analysis No. of participants in each group included in each analysis and whether it was done by “intention to treat” 69 70 0.72 0.45 to 0.98