Characteristics of Foraminal Endoscopic Discectomy Patients, by Group
| Group 1 (Cases 1–72) | Group 2 (Cases 73–144) | |
|---|---|---|
| Mean age in years | 45.5 | 45.4 |
| Sex | ||
| Male | 45 | 51 |
| Female | 27 | 21 |
| Operated discs, no. | 112 | 92 |
| One-level surgery, no. | 36 | 55 |
| Two-level surgery, no. | 32 | 14 |
| Three-level surgery, no. | 4 | 3 |