Vasculitis & polymyalgia rheumatica

Repeated short corticotropin testing in patients with polymyalgia rheumatica

Rheumatology (Oxford)Published Prospective cohort study

Authors' conclusion

GIAI was frequent but reversible during GC treatment for PMR

Study context

Population
Newly diagnosed patients with PMR, first 18 months after diagnosis
Participants
60 participants
Outcome
Prevalence of GC-induced adrenal insufficiency (GIAI; stimulated serum cortisol <420 nmol/l)
Methodological detailsrepeated short corticotropin testing
  • Repeated short corticotropin testing

Main finding

As reported in the abstract

GIAI prevalence (peak) · month 6

All patients

25%

13 events

Observational data: associations, not effects.

Further findings

Mean stimulated cortisol over time

Baseline, mean (SD)
678 ± 95
Month 6, mean (SD)
491 ± 114
Month 12, mean (SD)
549 ± 100
  • Declined significantly between baseline and month 6

Stimulated cortisol vs current glucocorticoid (GC) dose

Inverse relationship
P < 0.001

Adrenal function recovery among GIAI at month 6 · 12 months

Recovered
12/13 (92%)

GIAI in patients no longer receiving GC · month 12 and month 18

Month 12
1/31 (3%)
Month 18
0/12 (0%)

Original publication

Repeated short corticotropin testing in patients with polymyalgia rheumatica. Rheumatology (Oxford). Published 20 November 2025. doi:10.1093/rheumatology/keaf614

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