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Fatigue is a state of sustained exhaustion and decreased capacity of physical and mental work that is not relieved by rest. In most cases, it is due to either physical or psychiatric causes. In the United States each year there are over 10 milliion physician visits for fatigue and it's associated with most chronic and acute illnesses. Providers must distinguish fatigue from sleepiness.
To ensure an accurate results, it's essential that the patient understands the difference between sleep and fatigue.
Fatigue Severity Scale
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| During the past week, I have found that |
Disagree |
<---> |
Agree |
| 1. My motivation is lower when I am fatigued. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 2. Exercise brings on my fatigue. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 3. I am easily fatigued. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 4. Fatigue interferes with my physical functioning. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 5. Fatigue causes frequent problems for me. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 6. My fatigue prevents sustained physical functioning. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 7. Fatigue interferes with carrying out certain duties and responsibilities. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 8. Fatigue is among my 3 most disabling symptoms. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
| 9. Fatigue interferes with my work, family, or social life. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
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Total Score |
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| FSS mean score = total of 9 items divided by 9. |
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Mean Score |
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Interpretation: FSS score > 4 indicates severe fatigue.
References:
Morrison RE, et al, Obstet Gynecol Clin North Am 2001
Krupp et al, Arch Neural 1989
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