Incidence of de novo sacroiliac joint pain following adult spinal deformity surgery with pelvic fixation
Bibliographic record
Abstract
OBJECTIVE: The aim of this study was to determine the rate of postoperative new-onset sacroiliac joint pain (SIJP) following adult spinal deformity (ASD) surgery with pelvic fixation. METHODS: Patients undergoing ASD surgery with pelvic fixation, without baseline SIJP, and with a minimum 1-year follow-up were included. Patients were screened for SIJP by self-reported buttock/groin pain and/or posterior superior iliac spine (PSIS) pain scores ≥ 4. Patients with positive results on questionnaires were indicated for an SIJ examination consisting of 5 provocative maneuvers with ≥ 3 positive examination findings considered to be indicative of SIJP. Types of pelvic fixation were then compared for rates of postoperative SIJP. RESULTS: A total of 346 patients were identified, with mean age of 65 (SD 10) years and BMI of 28 (SD 5); 71% of patients were female. Thirteen patients (4%) underwent SIJ fusion at the index procedure. At the 1-year follow-up, 82 patients (24%) had positive screening responses for SIJP on the questionnaire; 63 underwent an SIJ examination and only 3 patients (1%) had a positive result. At the 2-year follow-up, 138 patients were administered the SIJP screening questionnaire; 31 (22%) had a positive questionnaire response for SIJP, 17 underwent an SIJ examination, and only 2 patients (1%) had a positive result. There was no difference in SIJP between patients with traditional iliac fixation (n = 162, 0% at 1 and 2 years) and S2-alar-iliac screws (n = 184), where 2% developed SIJP by 1 (p = 0.25) and 2 (p = 0.52) years, respectively. There was also no difference in SIJP between patients with 4 points of pelvic fixation (n = 85, 0% at 1 and 2 years) and patients with fewer than 4 points of pelvic fixation (n = 261), where 1% (p = 0.57) and 2% (p > 0.99) developed SIJP at 1 and 2 years, respectively. Of the 79 patients with iliac crest harvesting, none developed SIJP at the 1- or 2-year follow-up. CONCLUSIONS: Based on examination, the incidence of de novo SIJP following ASD surgery with pelvic fixation is low: only 1% at the 1- and 2-year follow-ups. The large discrepancy between at least moderate regional reported pain but a negative provocative examination warrants further investigation as to the source of substantial pain in nearly one-quarter of ASD patients postoperatively.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".