Effects of DPP4 Inhibitors as Neuroprotective Drug on Cognitive Impairment in Patients with Type 2 Diabetes Mellitus: A Meta-Analysis and Systematic Review

Figure 2

Assessment of risk of bias. As shown in the figure, the risk of bias was evaluated in six dimensions. Low risk of bias was represented by green, unclear risk of bias was represented by yellow, and high risk of bias was represented by red.