Clinical Significance of Lumbosacral Kyphosis in Adolescent Spondylolisthesis
Bibliographic record
Abstract
STUDY DESIGN: A cross-sectional study of 96 patients with lumbosacral adolescent spondylolisthesis. OBJECTIVE: To evaluate whether lumbosacral kyphosis (LSK) is associated with the quality of life of patients with spondylolisthesis and to identify reference values of LSK associated with significant impairments in quality of life. SUMMARY OF BACKGROUND DATA: LSK is considered an important aspect of deformity in adolescent spondylolisthesis, but its clinical impact is not known. METHODS: Sixty-seven patients with low-grade and 29 with high-grade adolescent lumbosacral spondylolisthesis were evaluated. Three radiological parameters of LSK were measured: slip angle (SA), Dubousset lumbosacral angle (Dub-LSA), and lumbosacral joint angle (LSJA). All patients completed the Short Form Health Survey-12v2 questionnaire. Pearson correlations were calculated between each radiological parameter and the questionnaire scores. RESULTS: Correlations of the 3 LSK parameters with the physical component summary of the Short Form Health Survey-12v2 were significant (r = -0.55 for SA, 0.52 for Dub-LSA, and -0.55 for LSJA). Correlations were even stronger when calculated for high-grade patients only (r = -0.62 for SA, 0.56 for Dub-LSA, and -0.63 for LSJA). Correlations also remained significant when controlling for slip percentage. Values of 30°, 80°, and 30° for SA, Dub-LSA, and LSJA were associated with an increased proportion of subjects with poor physical component scores. CONCLUSION: LSK is significantly correlated to the physical aspect of the quality of life of adolescents with spondylolisthesis. The implication of abnormal LSK is particularly evident in patients with high-grade spondylolisthesis. All evaluated LSK parameters seem equivalent to measure this effect. LSK should be routinely measured in adolescents with spondylolisthesis to fully appreciate the severity of the deformity and its clinical association with the quality of life of the patient.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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".