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Table 2 Characteristics of included studies

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

Study Number of patients (Female/male) Age in years vertebral level treated Mean follow-up time (month)
  Unilateral PS Bilateral PS Unilateral PS Bilateral PS   Unilateral PS Bilateral PS
Choi [15] 26(14/12) 27(18/9) 53.39 ± 14.31 56.22 ± 12.62 L3-S1,one-level 27.52 ± 3.30 28.85 ± 4.37
Xiaolong [16] 31(14/17) 34(18/16) 57.3 ± 11.7 58.9 ± 10.1 L4-S1,one-level 26.6 (18-36)
Dahdaleh [17] 16(4/12) 20(6/14) 62.2 ± 13.1 57.3 ± 11.2 L3-S1,one-level 11.4 ± 6.1 12.4 ± 7.2