A modeling study involving patients with urinary tract infections (UTIs) in three African countries found that, contrary to previous research, antibiotic misuse was most common among the least deprived, researchers reported this week in the Lancet Global Health.
In the mixed-methods study, researchers with the Holistic Approach to Unraveling Antimicrobial Resistance Consortium collected data from 6,827 outpatients with UTI symptoms in Kenya, Tanzania, and Uganda from Feb 10, 2019, to Sep 10, 2020.
Patients provided urine samples and answered a questionnaire about treatment seeking, antibiotic use, and knowledge of antibiotic resistance, and researchers conducted in-depth interviews and held focus-group discussions with a subset of patients. Using an adapted version of the Multidimensional Poverty Index (global MPI), the researchers then investigated the association between multidimensional poverty and antibiotic misuse, which included self-reported antibiotic self-medication and nonadherence (ie, skipping a dose or not completing a course).
Of the 6,345 patients with complete data (79.2% female, 60.5% younger than 35 years), 42.6% were not deprived, 9.5% were vulnerable to poverty, 16.6% were deprived, and 31.4% lived in severe poverty. Controlling for age and sex, the analysis found that all categories of antibiotic misuse were more common among those least deprived and lowest among those living in severe multidimensional poverty. Regardless of poverty status, difficulties in affording healthcare and more familiarity with antibiotics were related to more antibiotic misuse.
Data from 82 linked, qualitative, in-depth patient interviews and unlinked focus-group discussions with community members (44 groups) suggested that self-medication and treatment nonadherence were driven by perceived inconvenience of the healthcare system, financial barriers, time constraints, seeking healthcare advice from people other than doctors, and ease of unregulated antibiotic access.
The behaviours of less deprived people might contribute more to the development of antimicrobial resistance than previously acknowledged.
The authors note that the findings also call into question the idea that improving knowledge and awareness of antibiotics can improve antibiotic use.
"In conclusion, although poverty has an important role in the antimicrobial resistance crisis, we should not assume that poorer subgroups drive antibiotic misuse," they wrote. "The behaviours of less deprived people might contribute more to the development of antimicrobial resistance than previously acknowledged, yet they are the least likely to suffer the consequences."