Figure 3.
The SN, oSP, NPV, and oPPV are shown for qualified studies. Additionally, the random-effects model indicating the heterogeneity of the studies for each calculation as described by the I2 value. An I2 value of 0 indicates no observed heterogeneity, 26% to 50% represents low heterogeneity, 51% to 75% indicates moderate heterogeneity, and >75% is high heterogeneity.
