Table 4.

MRI scores and reader agreement for assessment of probability of presence of prostate cancer

Protocol	Reader	MRI score					κ value
		1	2	3	4	5
A: T2WI + cDWI0–100	1	36	105	70	26	10	0.50 (0.33, 0.65)
	2	54	81	71	23	20
B: T2WI + cDWI0–500	1	54	105	45	24	20	0.54 (0.37, 0.70)
	2	36	106	69	27	10
C: T2WI + cDWI100–500	1	50	93	31	47	27	0.63 (0.52, 0.75)
	2	36	104	67	24	10
D: T2WI + cDWI0–1000	1	34	72	63	51	28	0.58 (0.40, 0.72)
	2	26	74	79	45	24
E: T2WI + cDWI100–1000	1	20	77	57	55	39	0.60 (0.44, 0.76)
	2	24	60	87	51	26
F: T2WI + cDWI500–1000	1	22	94	53	41	38	0.64 (0.48, 0.80)
	2	13	96	71	40	28
G: T2WI + mDWI2000	1	15	76	80	50	27	0.62 (0.46, 0.77)
	2	13	40	119	41	35

cDWI, computed diffusion-weighted imaging; cDWI_0–100, cDWI 0–100 s mm⁻²; cDWI_0–500, cDWI 0–500 s mm⁻²; cDWI_100–500, cDWI 100–500 s mm⁻²; cDWI_0–1000, cDWI 0–1000 s mm⁻²; cDWI_100–1000, cDWI 100–1000 s mm⁻²; cDWI_500–1000, cDWI 500–1000 s mm⁻²; DWI, diffusion-weighted imaging; mDWI₂₀₀₀, measured DWIs with b = 2000 s mm⁻²; T2WI, T₂ weighted imaging.

Figures in parentheses show 95% confidence intervals.