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Validation of a 24-hour Caffeine Intake Recall
A 24-hour Caffeine Intake Recall (CIR-24) was developed to estimate caffeine consumption in the previous 24 hours, modeled after the Automated Self-Administered 24-hour Dietary Assessment Tool (ASA24), using a brand-specific database of caffeine-containing foods, beverages and supplements. The objective of this study was to evaluate the accuracy of the CIR-24 compared to caffeine concentration biomarkers in urine and a caffeinated beverage intake frequency screener (CBQ) among a young adult population. 79 young adults ages 18 to 29 years provided 24-hour urine samples and completed the CIR-24 and CBQ. Excretion rates for caffeine and eight caffeine metabolites were quantified from urine samples using high performance liquid chromatography-polarity switching electrospray ionization-tandem quadrupole mass spectrometry with stable isotope labeled internal standards.
Details
| Lead sponsor | University of Waterloo |
|---|---|
| Status | COMPLETED |
| Enrolment | 79 |
| Start date | Mon Jul 06 2015 00:00:00 GMT+0000 (Coordinated Universal Time) |
| Completion | Wed Aug 19 2015 00:00:00 GMT+0000 (Coordinated Universal Time) |
Conditions
- Caffeine-Related Disorders
Interventions
- No intervention was included
Countries
Canada