Table 2.
Histological differences according to PM grade in non-ISI group.
| PM grade 3 (N = 18) | PM grade 4, 5 (N = 73) | P-value | |
|---|---|---|---|
| Age, yrs | 51.83 ± 6.95 | 71.7 ± 6.88 | < 0.01a |
| Sex | |||
| Men | 7 (38.9%) | 32 (43.8%) | 0.70 |
| Women | 11 (61.1%) | 41 (56.2%) | |
| Chondrocyte proliferation | |||
| C1 | 5 (27.8%) | 5 (6.8%) | 0.03a |
| C2 | 5 (27.8%) | 19 (26.0%) | |
| C3 | 8 (44.4%) | 49 (67.1%) | |
| Granular matrix change | |||
| M1 | 9 (50.0%) | 18 (24.7%) | 0.04a |
| M2 | 9 (50.0%) | 55 (75.3%) | |
Values are presented as number (%), or mean ± standard deviation unless otherwise indicated.
PM, pfirrmann; ISI, intradiscal steroid injection.
Continuous variables were analyzed using student's t-test.
Categorical variables were analyzed using the chi-square test.
a
P-value < 0.05.