Modified Fatigue Impact Scale

How much is fatigue affecting your life?

Answer 21 questions about the past four weeks. You’ll get a total fatigue-impact score plus separate physical, cognitive, and psychosocial views.

Start the survey
About 3 minutesNo signup requiredPrivate by default
Your responses

During the past 4 weeks…

0 of 21answered

Choose how often fatigue affected you in each way. Answer every question; if you’re unsure, choose the closest response.

Answer all 21 questions to calculate your results.

How scoring works

A clearer view than one number alone.

Physical

9 items covering effort, weakness, activity limits, pacing, and rest.

Cognitive

10 items covering alertness, attention, memory, decisions, and thought organization.

Psychosocial

2 items covering participation in social life and activities away from home.

About this instrument: This page reproduces the 21-item Modified Fatigue Impact Scale and scoring structure in the Shirley Ryan AbilityLab form. Higher scores indicate greater fatigue impact. The score is not a diagnosis and should not replace medical evaluation. Seek prompt medical care for new, severe, or rapidly worsening fatigue.