Predictive Value of the Oxford Classification for the Effect of Glucocorticoid Therapy in IgA Nephropathy
Bibliographic record
Abstract
Key Points The presence of cellular segmental sclerosis and crescents predicts a favorable response to glucocorticoid therapy in patients with IgA nephropathy. Glucocorticoid therapy was associated with lower risk of kidney failure across histologic subtypes, with the greatest benefit in cellular segmental sclerosis. The study highlights that there is a need for further subclassification of segmental sclerosis lesions that may guide therapeutic decisions. Background The Oxford Classification is widely accepted as a histopathology tool to predict kidney outcomes in IgA nephropathy. However, it remains unclear whether the mesangial hypercellularity (M), endocapillary proliferation (E), segmental glomerulosclerosis (S), tubular atrophy/interstitial fibrosis (T), and crescents (C) scores can predict therapeutic response. This study aims to determine the predictive value of mesangial hypercellularity (M), endocapillary proliferation (E), segmental glomerulosclerosis (S), tubular atrophy/interstitial fibrosis (T), and crescents (C) scores on the efficacy of glucocorticoid therapy using the Therapeutic Effects of Steroids in IgA Nephropathy Global trial. Methods Three hundred and seventy-nine Chinese participants were enrolled in the Therapeutic Effects of Steroids in IgA Nephropathy Global trial, of whom 279 had kidney biopsy slides available for central pathology review. The primary outcomes were a composite of ≥40% reduction in eGFR, kidney failure, or death due to kidney disease. Multivariable Cox regression analysis was used to determine the effects of glucocorticoid therapy across pathologic subgroups, and the interaction between glucocorticoid therapy and pathology scores was evaluated. Results Among 279 participants selected for this study, the median (interquartile range) time from kidney biopsy to randomization was 4 (3–7) months. The median (interquartile range) follow-up was 4.7 (3.0–6.4) and 5.1 (3.1–6.8) years for the placebo and glucocorticoid-treated group. Glucocorticoid therapy showed benefits across all histologic subtypes. Participants with crescents (C1/C2) showed a trend toward greater benefit from glucocorticoid therapy (C1/2: hazard ratio [HR], 0.05 [95% confidence interval (CI), 0.008 to 0.3]; C0: HR, 0.6 [95% CI, 0.4 to 0.9]; P for interaction = 0.4). Participants with hypercellularity within segmental sclerosis lesions (cellular segmental sclerosis) demonstrated a significant reduction in the risk of kidney failure compared with those without (HR, 0.2 [95% CI, 0.07 to 0.4] versus HR, 0.6 [95% CI, 0.4 to 1.0]; P for interaction = 0.03). Analysis of local pathologists' scores of all 379 Chinese participants demonstrated a significantly greater benefit from glucocorticoid therapy in participants with crescents (C0: HR, 0.7 [95% CI, 0.4 to 1.2]; C1: HR, 0.3 [95% CI, 0.2 to 0.6]; C2: HR, 0.2 [95% CI, 0.08 to 0.7]; P for interaction = 0.05). Conclusions The presence of crescents and cellular segmental sclerosis in patients with IgA nephropathy was associated with a favorable response to glucocorticoid therapy.
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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 | 0.002 | 0.005 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| 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 | 0.000 | 0.001 |
| 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".