Table 1.
Demographic Features of Study Population by Disc Grade (% Incidence).
| Grade I (n = 1) | Grade II (n = 6) | Grade III (N = 12) | Grade IV (n = 17) | Grade V (n = 4) | ||
|---|---|---|---|---|---|---|
| Age (years) | ≤35 | 100% | 33.33% | 25% | 17.65% | 0 |
| 36-59 | 0 | 66.67% | 75% | 58.82% | 50% | |
| ≥60 | 0 | 0 | 0 | 23.52% | 50% | |
| Gender | Male | 100% | 33.33% | 41.67% | 35.29% | 50% |
| Female | 0 | 66.67% | 58.33% | 64.71% | 50% | |
| Race | Black | 0 | 33.33% | 33.33% | 23.53% | 25% |
| White (not of Hispanic origin) | 0 | 66.67% | 66.67% | 76.47% | 75% | |
| Unknown | 100% | 0 | 0 | 0 | 0 | |
| Spinal Site* | L2-3 | 0 | 0 | 0 | 5.88% | 0 |
| L3-4 | 0 | 16.67% | 0 | 0 | 25% | |
| L4-5 | 0 | 33.33% | 41.67% | 35.29% | 50% | |
| L5-S1 | 100% | 50% | 58.33% | 58.82% | 25% | |
*L, lumbar; S, sacral