The interrater reliability of Modic changes among a potential basivertebral nerve ablation population: Why AC1 may be preferred to kappa.

Interrater reliability of Modic changes is subject to variables which affect consistency in reporting. Given the importance of Modic change identification for basivertebral nerve ablation (BVNA) candidacy, interrater reliability for this specific cohort has not yet been reported. Twenty lumbar magnetic resonance images of potential basivertebral nerve candidates were independently reviewed by two neuroradiologists and two interventional spine physiatrists for the presence and characterization of Modic changes. The kappa value of their agreement on the presence of Modic changes was 0.52 (95% confidence interval [CI] 0.37-0.67), whereas agreement on the type of Modic change was 0.51 (95% CI 0.37-0.65). Using an alternative methodology for measuring interrater reliability (Gwet's AC1) yielded the identification of the presence of Modic changes at AC1 0.51 (95% CI 0.36-0.66), whereas agreement on the type of Modic change was AC1 0.75 (95% CI 0.66-0.83). While less common, AC1 may be preferred in the appropriate cohort to kappa as it mitigates some of the pitfalls to which kappa values may be victim. Ultimately, our results are in-line with previous reports of interrater reliability results for Modic changes in other cohorts and should serve to caution those who perform BVNA regarding interrater agreement of the imaging crux of the procedure.

Are Arthroplasty Procedures Really Better in the Treatment of Complex Proximal Humerus Fractures? A Comprehensive Meta-Analysis and Systematic Review.

OBJECTIVE: A meta-analysis and systematic review was performed to compare outcomes of open reduction and internal fixation (ORIF), hemiarthroplasty (HA), and reverse total shoulder arthroplasty (rTSA) for complex proximal humerus fractures. Data sources: MEDLINE, Embase, and Cochrane Library databases were screened. Search terms included reverse total shoulder arthroplasty, open reduction internal fixation, hemiarthroplasty, and proximal humerus fracture. STUDY SELECTION: English-language studies published within the past 15 years evaluating outcomes of ORIF, rTSA, or HA for complex proximal humerus fractures with minimum of 1-year follow-up were included, resulting in 51 studies with 3064 total patients. Review articles, basic science studies, biomechanical studies, and cadaveric studies were excluded. DATA EXTRACTION: The methodological quality of evidence was assessed using the Jadad scale and methodological index for nonrandomized studies. DATA SYNTHESIS: Demographic data were compared using the χ2 test. Mean data were weighted by study size and used to calculate composite mean values and confidence intervals. Continuous data were compared using the Metan module with fixed effects. Count data were compared using the Kruskal-Wallis test. Alpha was set at 0.05 for all tests. CONCLUSIONS: Patients undergoing rTSA had lower risks of complication (relative risk 0.41) and reoperation (relative risk 0.28) than HA patients. rTSA resulted in higher Constant scores (standard mean difference 0.63) and improved active forward flexion when compared with HA (standard mean difference 0.76). Pooled mean data demonstrated better outcome scores and active forward flexion of ORIF versus HA and rTSA, although the patients were younger and had more simple fracture patterns. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.