Relationship between needle-tip location and contrast distribution
| Needle-Tip Location | P Value | |||
|---|---|---|---|---|
| Foraminal Zone | Junctional | Extra-Foraminal | ||
| Intraforaminal contrast | ||||
| Present | 30 | 35 | 7 | <.001 |
| Absent | 0 | 1 | 17 | |
| Central epidural contrast | ||||
| Present | 8 | 4 | 0 | .01 |
| Absent | 22 | 32 | 24 | |
| Extraforaminal contrast | ||||
| Present | 27 | 34 | 22 | .79 |
| Absent | 3 | 2 | 2 | |