Thus, the minimal sample size was determined to be 567 people, to which 10% was added to account for potential losses, making a total of 624 people who needed to be interviewed22.
The study population consisted of Alegre residents from urban areas who were at least 18 and consented to participate in the study by signing the Informed Consent Form. The sample size was calculated using the 21,512 urban residents of the municipality as a reference at a 95% confidence level (α error = 0.05), with an expected prevalence of using medicinal herbs of 50%, and the design effect of 1.5. Thus, the minimal sample size was determined to be 567 people, to which 10% was added to account for potential losses, making a total of 624 people who needed to be interviewed22.