1 | 47 | Two previous excisions of herniated disk at L4–L5, recurrent left leg pain | Not offered | Gadopentetate | 43.1 | 48.3 | 69.9 | 40.1 | 93.4 | 48.4 |
| | | | Gadodiamide | 33.9 | 34.6 | 87.7 | 58.0 | 89.4 | 47.1 |
| | | | | | | | | | |
2 | 43 | L3–L4 discectomy, recurrent pain | At laminectomy, large scar and fragment containing end plate and bone | Gadopentetate | 42.7 | 45.4 | 88.6 | 33.5 | 76.1 | 44.7 |
| | | | Gadodiamide | 28.6 | 36.6 | 103.6 | 47.7 | 86.0 | 69.0 |
3 | 37 | 5 years previously, laminectomy and discectomy at L4–L5, pain recurred | At laminectomy, large fragment | Gadopentetate | 22.9 | 33.1 | 45.4 | 33.1 | 52.8 | 34.8 |
| | | | Gadodiamide | 33.8 | 24.8 | 72.9 | 33.8 | 90.5 | 32.8 |
4 | 47 | Pain in lower back, previous L4–L5 laminectomy and discectomy | Lost to follow-up | Gadopentetate | 68.9 | 60.0 | 99.6 | 61.8 | 103.5 | 68.8 |
| | | | Gadodiamide | 46.2 | 40.0 | 80.3 | 52.0 | 78.3 | 56.0 |
5 | 46 | Previous discectomies L4–L5 and L5–S1, low back and left lower extremity pain | Not offered | Gadopentetate | 25.9 | 27.1 | 47.5 | 32.2 | 42.7 | 30.5 |
| | | | Gadodiamide | 23.5 | 22.8 | 46.0 | 25.7 | 47.0 | 39.3 |
6 | 48 | Microdiscectomy L5–S1 1 year previously, recurrence of pain | Not offered | Gadopentetate | 35.0 | 32.0 | 59.0 | 45.0 | 68.0 | 54.0 |
| | | | Gadodiamide | 35.0 | 32.0 | 91.0 | 54.0 | 80.0 | 57.0 |
7 | 39 | Discectomy L4–L5 in 1998, revision in 2000, gradually worsening right buttock and thigh pain for 6 months | Anterior discectomy | Gadopentetate | 37.9 | 53.3 | 94.7 | 65.7 | 90.8 | 72.4 |
| | | | Gadodiamide | 33.7 | 43.7 | 76.9 | 49.3 | 80.5 | 51.5 |
8 | 42 | Microdiscectomy L4–L5, acute onset of pain radiating into left leg | At laminectomy, large herniation | Gadopentetate | 24.0 | 21.0 | 67.0 | 28.0 | | |
| | | | Gadodiamide | 18.0 | 22.0 | 87.0 | 40.0 | | |