Characteristics of enrolled subjects.
| Characteristic | Value |
|---|---|
| Age, mean (range) | 50.9 (23.5 - 71.6) |
| Women, n (% female) | 120 (69.8%) |
| Race, n (%) White Hawaiian / Pacific Islander Black Other | 166 (96.5%) 1 (0.6%) 2 (1.2%) 3 (1.7%) |
| Ethnicity Hispanic or Latino, n (%) | 7 (4.1%) |
| Body mass index, mean (range) | 29.4 (17.2 - 51.0) |
| Smoking status, n (%) Current smoker Former smoker Never smoker Ambulatory without assistance (n,%) | 44 (25.6%) 49 (28.5%) 79 (45.9%) 154 (89.5%) |
| Work status (n,%) Working full time Working part time Not working, retired Not working due to back pain Not working, other reason Prior lumbar fusion (n,%) | 64 (37.2%) 9 (5.2%) 35 (20.3%) 60 (34.9%) 4 (2.3%) 76 (44.2%) |
| Underlying diagnosis Degenerative sacroiliitis Sacroiliac joint disruption Years of pain, mean (range) | 135 (78.5%) 37 (21.5%) 5.1 (0.43-41.08) |
| Pain syndrome Pain began peripartum Pain radiates down leg Groin pain Pain worse with sitting Pain worse with rising Pain worse with walking Pain worse with climbing stairs Pain worse descending stairs | 20 (11.6%) 144 (83.7%) 96 (55.8%) 151 (87.8%) 137 (79.7%) 153 (89.0%) 150 (87.2%) 117 (68.0%) |
| Prior treatments Physical therapy Steroid SI joint injection RF ablation Taking narcotics (n,%) Proportion with lumbar stenosis (n,%) Proportion with hip diagnosis (n,%) | 111 (64.5%) 162 (94.2%) 27 (15.7%) 131 (76.2%) 42 (24.4%) 24 (14.0%) |