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Related Experiment Video

Updated: May 17, 2026

Fecal Glucocorticoid Analysis: Non-invasive Adrenal Monitoring in Equids

Fecal Glucocorticoid Analysis: Non-invasive Adrenal Monitoring in Equids

Published on: April 25, 2016

Guaiac interpretation by non-certified clinicians.

Kimberly A Lyons¹, Stuart I Kimura, Loren G Yamamoto

¹Kapi'olani Medical Center For Women & Children, Department of Pediatrics, University of Hawai'i John A. Burns School of Medicine, Honolulu, HI, USA.

Hawai'I Journal of Medicine & Public Health : a Journal of Asia Pacific Medicine & Public Health

|November 2, 2012

Summary

Non-certified clinicians can generally interpret guaiac fecal occult blood tests correctly. However, moderate error rates, especially with borderline results, highlight the need for training and competency assessment for accurate point-of-care testing.

Keywords:

Guaiac certification interpretation

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Area of Science:

Clinical diagnostics
Point-of-care testing
Gastroenterology

Background:

Guaiac fecal occult blood testing (gFOBT) is a common screening tool.
Accurate interpretation of gFOBT results is crucial for patient diagnosis.
The competency of non-certified clinicians in interpreting these tests requires evaluation.

Purpose of the Study:

To evaluate the accuracy of non-certified clinicians in interpreting guaiac test results.
To determine if specific clinician groups exhibit varying levels of interpretation accuracy.
To inform best practices for training and competency assessment in gFOBT interpretation.

Main Methods:

Photographs of 20 guaiac test cards were presented to 50 clinicians.
Participants included nurses, clinical assistants, attending physicians, resident physicians, and medical students.
Clinicians classified test cards as positive, negative, or uncertain.

Main Results:

Mean correct interpretation percentages for clearly positive or negative cards ranged from 87% to 96% across all clinician groups.
Higher accuracy was observed for unambiguous test results.
Interpretation accuracy decreased for borderline positive guaiac test cards.

Conclusions:

While most clinician groups demonstrated high accuracy in interpreting guaiac tests, a moderate error rate was observed.
The findings support the necessity of standardized training and demonstrated competency for clinicians performing point-of-care guaiac testing.
Ensuring consistent and accurate interpretation is vital for reliable diagnostic outcomes.