Fig. 4
a. Forrest plots of the mean apparent diffusion coefficients of PC with Gleason score 7. The pooled mean ADC value was 0.87 × 10− 3 mm2/s [95% CI 0.80–0.94]. b. Forrest plots of the mean apparent diffusion coefficients of PC with Gleason score 8 and higher. The pooled mean ADC value was 0.76 × 10− 3 mm2/s [95% CI 0.71–0.82]. c. Box plots of the mean ADC values of clinical insignificant comprising Gleason score 5 and 6, Gleason score 7 and Gleason score 8 and 9 PC groups. There is a clear trend for higher Gleason score PC to have lower ADC values.