| Patient | Age | Gender | Vas (pre-procedure) | Opioid dosage (oral morphine equivalents, mg.) | History of occipital pain (years) | Possible etiology |
| 1 | 50 | F | 7, 8, 0 | 0 | Unknown | Cervical spondylosis |
| 2 | 79 | F | 5, 5, 6, 7 | 0 | 3.5 | Cervical DDD |
| 3 | 52 | F | 5, 6, 4 | 30 | Unknown | Unknown |
| 4 | 57 | F | 0, 0, 0 | 0 | 1.5 | Unknown |
| 5 | 47 | F | 3 | 0 | 35 | Unknown |
| 6 | 41 | F | 5, 4 | 0 | 1.6 | Unknown |
| 7 | 56 | F | 4, 4, 4 | 0 | 5 | Whiplash injury |
| 8 | 46 | M | 1 | 0 | 2 | Unknown |
| 9 | 55 | M | 4 | 0 | 10 | Head/neck trauma |
| 10 | 42 | M | 0 | 0 | 10 | Whiplash injury |
| 11 | 51 | F | 3, 3 | 30 | 13 | Unknown |
| 12 | 50 | F | 5 | 52.5 | 1.6 | C1 fracture |
| 13 | 55 | F | 6 | 0 | 0.8 | Unknown |
| 14 | 69 | F | 7 | 0 | 5.5 | Unknown |
| 15 | 50 | F | 7 | 0 | 20 | Unknown |
| 16 | 65 | F | 5 | 30 | 1.3 | Whiplash Injury |
| 17 | 68 | M | 3 | 0 | 1 | Head/neck trauma |
| 18 | 66 | F | 10 | 5 | 0.3 | Unknown |
| 19 | 53 | F | 1 | 15 | 11 | Head/neck trauma |