Testing compliance of drug taking--a simple bed side method

Area of Science:

• Pharmacology and Therapeutics
• Clinical Diagnostics
• Public Health

Background:

• Patient compliance with prescribed medication regimens is a significant challenge in outpatient settings.
• Riboflavin, a vitamin, can serve as a urinary marker to objectively assess drug intake.
• Detection of urinary riboflavin via fluorescence under ultraviolet (UV) or torch light is a potential compliance monitoring tool.

Purpose of the Study:

• To evaluate the validity and reliability of using riboflavin as a urinary marker for assessing drug compliance.
• To compare the accuracy of UV light versus torch light methods for detecting urinary riboflavin fluorescence.
• To assess the agreement between medical and paramedical personnel in interpreting fluorescence results.

Main Methods:

• A study was conducted to assess compliance using riboflavin as a urinary marker.
• Fluorescence detection of riboflavin in urine was performed using both UV lamp and torch light.
• Sensitivity, specificity, and accuracy were calculated for each method and reader (medical vs. paramedical).

Main Results:

• The UV method demonstrated good sensitivity and specificity for both readers (e.g., 86% sensitivity, 82% specificity for Reader I).
• Accuracy for Reader I was similar between UV lamp (85%) and torch light (85%), while Reader II showed higher accuracy with UV (87%) than torch (79%).
• Inter-reader agreement for UV lamp fluorescence detection was 82% crude agreement and 64% chance-corrected agreement.

Conclusions:

• The UV lamp method is a reliable approach for assessing drug compliance, suitable for both medical and paramedical staff.
• The torch light method's reliability is more dependent on the reader, being more effective with medical personnel.
• Riboflavin fluorescence detection presents a practical and valid strategy for monitoring patient adherence in clinical practice.