This tool determines the likelihood of polymyalgia rheumatica (PMR) by evaluating four key criteria. Each criterion requires a yes or no (true/false) response, and certain responses contribute to a cumulative score that helps in identifying the condition. Here's how the scoring system works:

- Morning stiffness lasting more than 45 minutes adds 2 points.
- Hip pain or limited range of motion adds 1 point.
- Absence of both rheumatoid factor and anti-CCP antibodies adds 2 points.
- Absence of other joint pain adds 1 point.

After gathering these responses, each true answer is converted into its respective score. The points are then summed, resulting in a total score that can range from 0 to 6. This total score aids in interpreting the likelihood of PMR:

- A total score of 4 or more suggests a diagnosis of polymyalgia rheumatica.
- A score below 4 indicates that the criteria necessary for diagnosing polymyalgia rheumatica are not met.

This approach provides a structured assessment to determine if an individual is likely to have PMR based on specific symptoms and laboratory indicators. The tool delivers both the total score and its interpretation, offering valuable assistance in the diagnostic process.

The Classification Criteria for Polymyalgia Rheumatica is a clinical tool designed to aid in the diagnosis of polymyalgia rheumatica, a condition characterized by muscle pain and stiffness. The tool's primary components include the presence of morning stiffness lasting more than 45 minutes, hip pain or limited range of motion, absence of rheumatoid factor or anti-CCP antibodies, and absence of other joint pain. These components are used to stratify patients based on the likelihood of having polymyalgia rheumatica, thereby facilitating early diagnosis and treatment.

Classification criteria for polymyalgia rheumatica

2012 provisional classification criteria for polymyalgia rheumatica: a European League Against Rheumatism / American College of Rheumatology collaborative initiative.