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Related Experiment Video

Updated: Jun 5, 2026

A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level

A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level

Published on: January 19, 2024

Unexplained fatigue and hemoglobin: a primary care study.

J A Knottnerus, P G Knipschild, J W Wersch

Canadian Family Physician Medecin De Famille Canadien

|January 27, 2011

Summary

This summary is machine-generated.

This study found that anemia is rarely the cause of unexplained fatigue in general practice patients. Hemoglobin levels were similar between patients with fatigue and controls, suggesting other factors are usually responsible.

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Area of Science:

General Practice
Hematology
Internal Medicine

Background:

Unexplained fatigue is a common presenting symptom in primary care.
Anemia is often suspected as a cause of fatigue.
Diagnostic criteria for anemia and its relation to fatigue require further investigation in general practice.

Purpose of the Study:

To investigate the relationship between unexplained fatigue and hemoglobin concentration in a general practice setting.
To determine if anemia is a frequent diagnosis in patients presenting with unexplained fatigue.

Main Methods:

Hematologic parameters were measured in 174 patients with unexplained fatigue.
A control group of 148 patients was included for comparison.
Hemoglobin levels were analyzed, considering gender and symptom characteristics.

Main Results:

No significant differences in hemoglobin concentration distributions were observed between patients with unexplained fatigue and the control group.
Hemoglobin levels below 7.0 mmol/l were not detected in either group.
Factors such as symptom duration, severity, associated symptoms, and physician's suspicion did not influence the observed pattern.

Conclusions:

The hypothesis of anemia is infrequently confirmed in patients presenting with unexplained fatigue in a general practice setting.
Further research is needed to identify the common causes of unexplained fatigue.
This study highlights the low prevalence of anemia as a cause for unexplained fatigue in primary care.