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Agreement between different recall periods in drug utilization studies
Cassia Garcia Moraes1, Sotero Serrate Mengue1, Tatiane da Silva Dal Pizzol1,2
1Post-Graduate Program of Epidemiology, School of Medicine, Universidade Federal do Rio Grande do Sul - Porto Alegre (RS), Brazil.
Summary
This study found that recall periods of 7, 14, and 30 days show high agreement for reporting continuous drug use, suggesting validity for epidemiological surveys. Occasional drug use reporting improved with longer recall periods.
Area of Science:
- Pharmacology
- Epidemiology
- Biostatistics
Background:
- Accurate self-reported drug use is crucial for epidemiological studies.
- The choice of recall period can influence the accuracy of self-reported drug use data.
Purpose of the Study:
- To evaluate the agreement of 7, 14, and 30-day recall periods against a 24-hour recall for self-reported drug use.
- To determine the validity of different recall periods in capturing drug use patterns.
Main Methods:
- Participants were divided into three groups based on recall periods (7, 14, 30 days).
- Two interviews were conducted: a 24-hour drug use recall and a recall over the assigned period.
- Agreement was assessed using percent agreement and kappa statistics.
Main Results:
- For continuously used drugs, percent agreement ranged from 92-99% and kappa from 0.71-0.97.
- For occasionally used drugs, percent agreement was 63-81% and kappa was 0.27-0.52.
- Drug prevalence, especially for occasional use, increased with longer recall periods.
Conclusions:
- Recall periods of 7, 14, and 30 days demonstrate high agreement for assessing continuous drug use.
- These recall periods appear valid for investigating the use of continuously administered drugs in research settings.
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