Disc level and Pfirrmann grade | All (n=392) | Field (n=273) | Administrative (n=119) |
---|---|---|---|
L1–2 | |||
Grade 1 | 203 (51.8) | 140 (51.3) | 63 (52.9) |
Grade 2 | 89 (22.7) | 59 (21.6) | 30 (25.2) |
Grade 3 | 87 (22.2) | 66 (24.2) | 21 (17.7) |
Grade 4 | 13 (3.3) | 8 (2.9) | 5 (4.2) |
L2–3 | |||
Grade 1 | 179 (45.7) | 119 (43.6) | 60 (50.4) |
Grade 2 | 95 (24.2) | 68 (24.9) | 27 (22.7) |
Grade 3 | 80 (20.4) | 60 (22.0) | 20 (16.8) |
Grade 4 | 36 (9.2) | 25 (9.1) | 11 (9.3) |
Grade 5 | 2 (0.5) | 1 (0.4) | 1 (0.8) |
L3–4 | |||
Grade 1 | 146 (37.2) | 97 (35.5) | 49 (41.2) |
Grade 2 | 102 (26.0) | 74 (27.1) | 28 (23.5) |
Grade 3 | 94 (23.5) | 66 (24.2) | 28 (23.5) |
Grade 4 | 50 (12.8) | 36 (13.2) | 14 (11.8) |
L4–5 | |||
Grade 1 | 70 (17.8) | 48 (17.6) | 22 (18.5) |
Grade 2 | 63 (16.1) | 47 (17.2) | 16 (13.4) |
Grade 3 | 110 (28.1) | 74 (27.1) | 36 (30.3) |
Grade 4 | 143 (36.5) | 100 (36.6) | 43 (36.1) |
Grade 5 | 6 (1.5) | 4 (1.5) | 2 (1.7) |
L5–S1 | |||
Grade 1 | 88 (22.5) | 58 (21.2) | 30 (25.2) |
Grade 2 | 63 (16.1) | 42 (15.4) | 21 (17.7) |
Grade 3 | 87 (22.2) | 63 (23.1) | 24 (20.2) |
Grade 4 | 144 (36.7) | 101 (37.0) | 43 (36.1) |
Grade 5 | 10 (2.5) | 9 (3.3) | 1 (0.8) |
Data are shown as number (%). L and S refer to lumbar and sacral vertebrae, respectively.