Table 2.

The Pfirrmann grading system for lumbar disc degeneration.

	1	2	3	4	5
All (n = 182)
L1/2	0	90 (49.5)	43 (23.6)	22 (12.1)	27 (14.8)
L2/3	0	48 (26.4)	50 (27.5)	37 (20.3)	47 (25.8)
L3/4	2 (1.1)	24 (13.2)	57 (31.3)	46 (25.3)	53 (29.1)
L4/5	2 (1.1)	8 (4.4)	35 (19.2)	65 (35.7)	72 (39.6)
L5/S1	0	10 (5.5)	30 (16.5)	43 (23.6)	99 (54.4)
Low-score group (n = 102)
L1/2	0	74 (72.5)	21 (20.6)	6 (5.9)	1 (1.0)
L2/3	0	47 (46.1)	39 (38.2)	13 (12.7)	3 (2.9)
L3/4	2 (2.0)	24 (23.5)	50 (49.0)	23 (22.5)	3 (2.9)
L4/5	2 (2.0)	8 (7.8)	31 (30.4)	45 (44.1)	16 (15.7)
L5/S1	0	10 (9.8)	25 (24.5)	31 (30.4)	36 (35.3)
High-score group (n = 80)
L1/2	0	16 (20.0)	22 (27.5)	16 (20.0)	26 (32.5)
L2/3	0	1 (1.3)	11 (13.8)	24 (30.0)	44 (55.0)
L3/4	0	0	7 (8.8)	23 (28.7)	50 (62.5)
L4/5	0	0	4 (5.0)	20 (25.0)	56 (70.0)
L5/S1	0	0	5 (6.3)	12 (15.0)	63 (78.8)

Values are expressed as n (%).