36 results
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
that may cause false ... positive tests ... Amphetamines: Bupropion ... FalsePositive #Testing
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
Positives on Drug Tests ... positives on drug tests ... Brompheniramine • Bupropion ... Benzphetamine • Bupropion ... positive #drug #tests
Sensitivity Specificity False-Positive False-Negative Contingency Table / confusion matrix

Sensitivity refers to the test's ability to correctly
False-Negative ... Contingency Table ... Specificity of a test ... disease, who will test ... #Contingency #Table
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... brompheniramine, bupropion ... naproxen and modern tests ... DrugScreening #UDS #Testing
The following graph was prepared based on the latest information on Testing for the Diagnosis of
information on Testing ... There are NO tests ... chance of giving a false ... it is likely a false ... InfectiousDiseases #HIVAIDS #Testing
Syncope Diagnostic Testing and Evaluation: Cost Effectiveness
Frequency obtained - Abnormal findings - Helped determine etiology of
Syncope Diagnostic Testing ... Cost - Cost per test ... Cardiac stress test ... diagnosis #workup #testing ... Effectiveness #table
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
immunochemical test ... evaluation • False ... cauliflower, ETOH • False ... to unnecessary testing ... #OccultBlood #Testing
Iron Deficiency Anemia vs Anemia of Chronic Disease - Laboratory Testing

SUMMARY:
 - RDW, FEP, serum iron,
Disease - Laboratory Testing ... - Ferritin-best ... non-invasive test ... Disease #Laboratory #Testing ... #Comparison #Table
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
Tuberculosis Testing ... Tuberculin skin testing ... (TST) False-negative ... microscopy • Testing ... recommended because false-negative
Cholecystitis Diagnostic Test Characteristics  

Sensitivity, Specificity and Likelihood Ratios of Labs, Physical Exam findings, and
Cholecystitis Diagnostic Test ... Cholecystitis #Testing ... Characteristics #Table