Adrenal disease

Phase 3 Trial of Crinecerfont in Pediatric Congenital Adrenal Hyperplasia

N Engl J MedPublished Randomised controlled trial

Primary result · Change in androstenedioneResult — go to the resultLeast-squares mean difference −268 ng per deciliter

Authors' conclusion

In this phase 3 trial, crinecerfont was superior to placebo in reducing elevated androstenedione levels in pediatric participants with CAH and was also associated with a decrease in the glucocorticoid dose from supraphysiologic to physiologic levels while androstenedione control was maintained.

Study context

Population
Pediatric participants with classic congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency; baseline mean glucocorticoid dose 16.4 mg/m²/day, mean androstenedione 431 ng/dLrandomized 2:1
Participants
103 participants
Comparison
Crinecerfont vs placebo for 28 weeks
  • Crinecerfontn = 69
  • Placebon = 34reference
Primary endpoint
Change in androstenedione level from baseline
Follow-up
Week 4
Methodological detailsphase 3, multinational, placebo-controlled, 100 (97%) remained in the trial at 28 weeks
  • Phase 3
  • Multinational
  • Placebo-controlled
  • 100 (97%) remained in the trial at 28 weeks

Primary result

Change in androstenedione

Least-squares mean difference

−268 ng per deciliter

P < 0.001

Change by group

Crinecerfont

−197

ng per deciliter

Placebo

71

ng per deciliter

As reported in the abstract

Secondary outcomes

Observed mean androstenedione (before morning glucocorticoid dose) · week 4

OutcomeCrinecerfontPlaceboLSMD (percentage points)P value
Key secondary: percent change in glucocorticoid dose with androstenedione control maintained · week 28mean decreased by 18.0%mean increased by 5.6%−23.5P < 0.001

Safety

Adverse events

Headache, pyrexia, and vomiting were the most common AEs

Original publication

Phase 3 Trial of Crinecerfont in Pediatric Congenital Adrenal Hyperplasia. N Engl J Med. Published 2 June 2024. doi:10.1056/nejmoa2404655

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