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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