Orthopedics

WOMAC Osteoarthritis Index

Measures pain, stiffness, and physical disability in hip and knee osteoarthritis.

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Parameters

Pain: Walking on flat surface*

Pain: Going up or down stairs*

Pain: At night while in bed*

Pain: Sitting or lying down*

Pain: Standing upright*

Stiffness: First waking up in the morning*

Stiffness: After sitting, lying, or resting later in the day*

Function: Descending stairs*

Function: Ascending stairs*

Function: Rising from sitting*

Function: Standing*

Function: Bending to floor / picking up object*

Function: Walking on flat ground*

Function: Getting in or out of a car*

Function: Going shopping*

Function: Putting on your socks or pantyhose*

Function: Rising from bed*

Function: Taking off your socks or pantyhose*

Function: Lying in bed (turning over)*

Function: Getting in or out of the bathtub*

Function: Sitting*

Function: Getting on or off the toilet*

Function: Performing heavy domestic duties*

Function: Performing light domestic duties*

WOMAC Osteoarthritis Index Result

Formula

WOMAC Score = Pain (5 items × 0-4) + Stiffness (2 items × 0-4) + Physical Function (17 items × 0-4). Maximum = 96 points.

Clinical Pearls

The international gold standard outcome metric for assessing clinical response to total joint replacement (TKR/THR) and osteoarthritis clinical trials.

Limitations

Self-reported; patients with bilateral disease may have difficulty distinguishing disability between limbs.