Successful outcomes of unilateral vs bilateral pedicle screw fixation for lumbar interbody fusion: A meta-analysis with evidence grading

Figure 1 Flow diagram of study searching and selection process.

Figure 2 Risk of bias graph.

Figure 3 Risk of bias summary.

Figure 4 Forest plots of fusion rates and complications. A: Fusion rates; B: Complications.

Figure 5 Forest plots of subgroup analysis.

Figure 6 Forest plots of Δ visual analog scale, Δ Oswestry disability index, and Δ Japanese Orthopedic Association. A: Δ visual analog scale; B: Δ Oswestry disability index; C: Δ Japanese Orthopedic Association.

Figure 7 Forest plots of total blood loss, operation time, and length of hospital stay. A: Total blood loss; B: Operation time; C: Length of hospital stay.

Figure 8 Publication bias, metatrim, and metaninf of fusion rate. A: Publication bias; B: Metatrim; C: Metaninf.