modified_fatigue_impact_scale: Modified Fatigue Impact Scale (MFIS)

In cliot: Clinical Indices and Outcomes Tools

Modified Fatigue Impact Scale (MFIS)

Description

Calculates the Modified Fatigue Impact Scale (MFIS) score, a 21-item assessment derived from the Fatigue Impact Scale. It evaluates the effects of fatigue on physical, cognitive, and psychosocial functioning in patients with Multiple Sclerosis (MS).

Usage

modified_fatigue_impact_scale(q1, q2, q3, q4, q5, q6, q7, q8, q9, q10,
                              q11, q12, q13, q14, q15, q16, q17, q18,
                              q19, q20, q21)

Arguments

q1	Numeric (0-4). I have been less alert.
q2	Numeric (0-4). I have had difficulty paying attention for long periods of time.
q3	Numeric (0-4). I have been unable to think clearly.
q4	Numeric (0-4). I have been clumsy and uncoordinated.
q5	Numeric (0-4). I have been forgetful.
q6	Numeric (0-4). I have had to pace myself in my physical activities.
q7	Numeric (0-4). I have been less motivated to do anything that requires physical effort.
q8	Numeric (0-4). I have been less motivated to participate in social activities.
q9	Numeric (0-4). I have been limited in my ability to do things away from home.
q10	Numeric (0-4). I have had trouble maintaining physical effort for long periods.
q11	Numeric (0-4). I have had difficulty making decisions.
q12	Numeric (0-4). I have been less motivated to do anything that requires thinking.
q13	Numeric (0-4). My muscles have felt weak.
q14	Numeric (0-4). I have been physically uncomfortable.
q15	Numeric (0-4). I have had trouble finishing tasks that require thinking.
q16	Numeric (0-4). I have had difficulty organizing my thoughts when doing things at home or work.
q17	Numeric (0-4). I have been less able to complete tasks that require physical effort.
q18	Numeric (0-4). My thinking has been slowed down.
q19	Numeric (0-4). I have had trouble concentrating.
q20	Numeric (0-4). I have limited my physical activities.
q21	Numeric (0-4). I have needed to rest more often or for longer periods.

Details

Scoring Key: 0 = Never 1 = Rarely 2 = Sometimes 3 = Often 4 = Almost always

Subscales: Physical: Q4, 6, 7, 10, 13, 14, 17, 20, 21 (Range 0-36) Cognitive: Q1, 2, 3, 5, 11, 12, 15, 16, 18, 19 (Range 0-40) Psychosocial: Q8, 9 (Range 0-8)

Value

A list containing:

MFIS_Total_Score	The calculated total score (Range 0-84).
Impact_Interpretation	Classification based on the cutoff of 38 (predictive of clinically significant fatigue).
Subscales	A list containing the Physical, Cognitive, and Psychosocial domain scores.

References

Multiple Sclerosis Council for Clinical Practice Guidelines. Fatigue and Multiple Sclerosis: Evidence-Based Management Strategies for Fatigue in Multiple Sclerosis. Washington, DC: Paralyzed Veterans of America; 1998.

Examples

# Example 1: High Impact
# All items scored 3
modified_fatigue_impact_scale(3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
                              3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3)

# Example 2: Low Impact
# All items scored 1
modified_fatigue_impact_scale(1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                              1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.