Baseline disc characteristics.
| With Intradiscal Leakage (n=20) | Without Intradiscal Leakage (n=104) | P value | |
|---|---|---|---|
| Preoperative modified Pfirrmann disc grade | .799 | ||
| Grade 1 | 0 | 0 | |
| Grade 2 | 1 | 10 | |
| Grade 3 | 14 | 68 | |
| Grade 4 | 4 | 19 | |
| Grade 5 | 1 | 7 | |
| Baseline anterior disc height, mm | 8.11±2.50 | 8.49±3.23 | .865 |
| Baseline posterior disc height, mm | 4.24±1.15 | 4.19±1.92 | .194 |
| Baseline disc diameter, mm | 38.75±4.57 | 40.71±4.30 | .066 |
| Baseline Farfan index (%) | 31.87±8.01 | 30.51±8.77 | .521 |