Efficacy and safety of negative pressure wound therapy for the treatment of diabetic foot ulcers: A meta-analysis

Figure 1  Selection process of included studies.

Figure 2 Quality assessment of included studies using Cochrane Collaboration's tool criteria. Red in figure indicates high risk, and green means low risk.

Figure 3 Forest plots. A: The wound healing rate; B: The amputation rate; C: The 90% granulation tissue formation time; D: The adverse event incidence rate.

Figure 4  Funnel plot for publication bias in all included studies.