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Table 1 Modified Jadad score with eight items

From: Unilateral versus bilateral pedicle screw fixation of minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF): a meta-analysis of randomized controlled trials

Items assessed Choi[15] Xiaolong[16] Dahdaleh[17]
Was the study described as randomized? Yes Yes Yes
Was the method of randomization appropriate? Not described Yes Not described
Was the study described as blinded? No No No
Was the method of blinding appropriate? Not described Not described Not described
Was there a description of withdrawals and dropouts? Yes No Yes
Was there a clear description of the inclusion/exclusion criteria? Yes Yes Yes
Was the method used to assess adverse effects described? Yes Yes Yes
Was the method of statistical analysis described? Yes Yes Yes
Scores 5 5 5