Table 2. Summary of the interpretation of 389 MRI images.

	Reader A	Reader B	Reader C
Probability of disc herniation
Definite: no doubt about the presence of disc herniation	299 (76.9)	298 (76.6)	240 (61.7)
Probable: some doubt but probability >50%	38 (9.8)	28 (7.2)	67 (17.2)
Possible: reason to consider, but probability <50%	8 (2.1)	4 (1.0)	16 (4.1)
Definitely no disc herniation present	44 (11.3)	59 (15.2)	66 (17.0)
Probability of nerve root compression
Definite: no doubt about the presence of nerve root compression	222 (57.1)	277 (71.2)	144 (37.0)
Probable: some doubt but likelihood >50%	97 (24.9)	43 (11.1)	120 (30.8)
Possible: reason to consider, but likelihood <50%	42 (10.8)	32 (8.2)	64 (16.5)
Definitely no nerve root compression present	28 (7.2)	37 (9.5)	61 (15.7)

Reader A en B represent the two neuroradiologists, while reader C represents the neurosurgeon.

Values are n (%).