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Table 1 Interobserver agreement of PZ and TZ of PI-RARDS-v2

From: Interobserver agreement of Prostate Imaging–Reporting and Data System (PI-RADS–v2)

PIRADS-v2 Observer 1 Observer 2 K 95 % CI P value Percent agreement
Peripheral zone N = 46 N = 46     
 PI-RADS score II 5 (10.9) 5 (10.9) 0.78 0.47–1.0 0.001 83.9%
 PI-RADS score III 6 (13.0) 8 (17.4) 0.66 0.35–0.98 0.001 91.3%
 PI-RADS score IV 6 (13.0) 5 (10.9) 0.69 0.35–1.0 0.001 93.5%
 PI-RADS score V 29 (63.0) 28 (60.9) 0.91 0.79–1.0 0.001 95.7%
Transitional zone N = 25 N = 25     
 PI-RADS score I 7 (28.0) 6 (24.0) 0.89 0.69–1.0 0.001 96.0%
 PI-RADS score II 1 (4.0) 2 (8.0) 0.65 0.02–1.0 0.001 96.0%
 PI-RADS score III 5 (20.0) 6 (24.0) 0.65 0.28–1.0 0.001 88.0%
 PI-RADS score IV 3 (12.0) 4 (16.0) 0.83 0.52–1.0 0.001 96.0%
 PI-RADS score V 9 (36.0) 7 (28.0) 0.82 0.57–1.0 0.001 92.0%
Overall 71 71 0.81 0.69-0.93 0.001 94.9%