Renin-guided therapy with mineralocorticoid receptor antagonists in primary aldosteronism: feasibility study (RETAME-PA) — a clinical research protocol for a randomised controlled trial
Bibliographic record
Abstract
INTRODUCTION: Primary aldosteronism (PA) is a highly prevalent but underdiagnosed cause of hypertension, characterised by renin-independent aldosterone production. PA is associated with a higher incidence of cardiovascular and kidney complications, independent of blood pressure. Although mineralocorticoid receptor antagonists (MRAs) are the standard treatment when surgical adrenalectomy is not clinically indicated or possible, response is typically monitored using indirect clinical markers such as blood pressure and potassium. Emerging evidence suggests that achieving renin unsuppression may result in better outcomes, yet this hypothesis has not been tested in a randomised controlled trial. The objective of this trial is to evaluate whether a renin-guided MRA titration strategy improves biochemical efficacy compared with standard titration in patients with PA. METHODS AND ANALYSIS: This is a multicentre, open-label, pragmatic randomised controlled trial in four academic centres in Canada. 58 adults with confirmed PA, suppressed renin at baseline, and an indication for long-term MRA therapy will be enrolled. Key exclusion criteria include prior MRA use, estimated glomerular filtration rate <30 mL/min/1.73 m², potassium levels >4.8 mmol/L and pregnancy. The primary endpoint is the proportion of participants with unsuppressed renin at 12 months. Secondary outcomes include blood pressure, left ventricular mass, kidney function, MRA dose, quality of life and various safety outcomes. Participants will be randomised 1:1 to a renin-guided titration strategy or standard care. In the intervention arm, MRAs will be titrated to achieve unsuppressed renin (>10 ng/L, >15 mIU/L or >1.0 ng/mL/hour). The control arm follows usual clinical practice, without serial renin measurements during dose titration. All participants will be followed for 12 months, with visits at 1, 3, 6, 9 and 12 months. Analysis will follow the intention-to-treat principle and use Fisher's exact test for proportions, mixed-effects models for continuous outcomes and Kaplan-Meier estimates for time-to-event data. The trial is powered to detect a 42% absolute difference in the primary outcome (40% in the control groups vs 82% in the experimental group; alpha 0.05, 80% power, 15% loss to follow-up). This trial will be the first to prospectively assess the biochemical efficacy of a renin-guided MRA titration strategy in PA. If successful, the next phase will be to assess the efficacy of this strategy on important surrogate outcomes and patient-reported outcome measures. ETHICS AND DISSEMINATION: This study was approved by the Research and Ethics Board of the Centre intégré universitaire de santé et de services sociaux du Nord-de-l'Île-de-Montréal (project number 2024-2727). All the participating sites have received the ethics approval. The findings will be disseminated through national and international presentations and peer-reviewed publications. TRIAL REGISTRATION NUMBER: NCT06108427.
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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 | 0.041 | 0.032 |
| Meta-epidemiology (narrow) | 0.006 | 0.003 |
| Meta-epidemiology (broad) | 0.011 | 0.005 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.002 | 0.004 |
| Scholarly communication | 0.005 | 0.004 |
| Open science | 0.004 | 0.002 |
| Research integrity | 0.008 | 0.006 |
| Insufficient payload (model declined to judge) | 0.050 | 0.010 |
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".