Baseline characteristics of study participants.
| Demographics | N | Summary |
| Age at procedure, mean ± SD (range) | 249 | 60.5 ± 12.8 (21–87) |
| Female, % (n) | 250 | 70.8% (177) |
| BMI (kg/m2), mean ± SD (range) | 250 | 30.1 ± 6.8 (17–56) |
| Duration of SI joint pain, % (n) | 250 | |
| 6 months to 1 year | 18.0% (45) | |
| 1–2 years | 26.0% (65) | |
| >2 years | 56.0% (140) | |
| Taking narcotics/opioids, % (n) | 250 | 62.0% (155) |
| Prior SI joint treatment, % (n) | 250 | |
| Acupuncture | 8.8% (22) | |
| Biofeedback | 0% | |
| Bracing | 30.0% (75) | |
| Chiropractic care | 27.6% (69) | |
| Physical therapy | 88.0% (220) | |
| Prior SI joint Fusion | 8.0% (20) | |
| SI joint steroid injection | 93.2% (233) | |
| Sacral nerve ablation | 10.0% (25) | |
| TENS unit | 22.4% (56) | |
| Prior lumbar spine procedures, % (n) | 250 | |
| Lumbar total disc replacement | 0% | |
| Lumbar decompression | 13.2% (33) | |
| Lumbar discectomy | 11.2% (28) | |
| Lumbar laminectomy | 17.2% (43) | |
| Lumbar fusion | 36.8% (92) | |
| VAS pain score, mean ± SD (range) | 249 | 76.6 ± 11.9 (30–100) |
| Oswestry Disability Index, mean ± SD (range) | 249 | 54.5 ± 13.1 (18–92) |
| EQ-5D, mean ± SD (range) | 246 | |
| EQ-5D preference weights (formerly “time trade-off”) | 0.52 ± 0.17 (−0.11–0.83) | |
| EQ-5D VAS (scale of 0 to 100) | 60.22 ± 23.03 (0.00–100.00) |
SI, sacroiliac; VAS, visual analog scale.