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Widespread Pain Index (WPI)

Calculator

When to use

Areas in which the patient had pain over the past week

Shoulder girdle, left

Shoulder girdle, right

Upper arm, left

Upper arm, right

Lower arm, left

Lower arm, right

Hip buttock, trochanter), left

Hip buttock, trochanter), right

Upper leg, left

Upper leg, right

Lower leg, left

Lower leg, right

Jaw, left

Jaw, right

Chest

Abdomen

Upper back

Lower back

Neck

Calculation

Please enter all the required inputs.

The Widespread Pain Index (WPI) is a clinical calculator used in the diagnosis of fibromyalgia, a chronic condition characterized by widespread pain, fatigue, and cognitive difficulties. The WPI is part of the American College of Rheumatology's (ACR) 2010 diagnostic criteria for fibromyalgia. The WPI applies to patients who present with chronic, widespread pain. It quantifies the number of body regions out of 19 possible areas where the patient has experienced pain in the last week. The score ranges from 0 to 19, with higher scores indicating more widespread pain. The clinical utility of the WPI is to aid in the diagnosis of fibromyalgia, particularly in conjunction with the Symptom Severity Score (SSS). Together, these scores can help clinicians differentiate fibromyalgia from other conditions with similar symptoms. Exclusion criteria for the use of the WPI include the presence of a disorder that would otherwise explain the pain, such as rheumatoid arthritis or lupus. It is also not applicable in acute pain situations or for localized pain conditions.

Reference

Frederick Wolfe, Daniel J Clauw, Mary-Ann Fitzcharles et al. The American College of Rheumatology preliminary diagnostic criteria for fibromyalgia and measurement of symptom severity. Arthritis Care Res (Hoboken). 2010 May;62(5):600-10.

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