What ESR and CRP are required for PMR diagnosis?

ACR/EULAR 2012 criteria require ESR ≥50 mm/hr or CRP elevated. Required features: bilateral shoulder aching, abnormal ESR/CRP, age ≥50. Morning stiffness >45 min, hip pain, negative RF/ACPA, and ultrasound findings add scoring points for definite (≥5 points) vs probable (≥4 points) PMR.

How quickly does PMR respond to prednisone?

Dramatic improvement within 24–72 hours of prednisone 15–20 mg/day is characteristic and nearly diagnostic. Failure to respond within 1 week should prompt reconsideration of diagnosis. ESR normalizes within 2–4 weeks.

Polymyalgia Rheumatica ESR Threshold Calculator

Apply ESR and CRP thresholds in the ACR/EULAR 2012 PMR classification criteria, integrated with clinical features for definite, probable, or possible PMR diagnosis.

Use the full interactive calculator below, or

Polymyalgia Rheumatica ESR Threshold Calculator

Frequently Asked Questions

What ESR and CRP are required for PMR diagnosis?

How quickly does PMR respond to prednisone?