Sample
The sample consists of 6,827 adult outpatients, aged 18 and over (or pregnant and <18) who were recruited from healthcare facilities in Kenya, Tanzania, and Uganda, within three sites per country (Kenya: Nairobi, Nanyuki, and Makueni; Tanzania: Mwanza, Kilimanjaro, and Mbeya; Uganda: Mbarara, Nakapiripirit, and Nakasongola), between February 2019- September 2020. We recruited patients at primary, and secondary facilities (levels 2-5) which were predominantly government-funded (Table S1). Clinicians identified patients with symptomatic and probable UTI for inclusion. In all sites, less than 1% of those approached declined to participate. Patients provided a clean catch mid-stream urine sample and answered a questionnaire on treatment-seeking for UTI symptoms, AB use practices and attitudes, and sociodemographic characteristics. We excluded 219 patients who came to the recruitment clinic for non-UTI symptoms and had not attempted to treat their symptoms, leaving 6,608 patients for analysis: 3,190 (48·3%) from Tanzania, 1,757 (26·6%) from Uganda, and 1,661 (25·1%) from Kenya.
In-depth interviews (IDIs) were conducted 1-2 weeks after the clinic visit with a purposively selected subset of patients (n=116) who had reported longer treatment pathways or were diagnosed with a multi-drug resistant UTI pathogen. IDIs were conducted in person, at the respondents’ homes and in their primary language, using standardised topic guides, which were subsequently translated into English by fieldworkers. IDIs focused on mapping individual pathways based on the patient’s account of recent treatment-seeking action, AB use, knowledge and attitudes, and motivations for behaviours. Patient qualitative and quantitative data were linked using study barcodes. Participants gave written informed consent. Patients were not involved in the design, or conduct, or reporting, or dissemination plans of our research. Ethical approval was obtained from National and Institutional Research Ethics Committees (see protocol).[20]
Study variables
Treatment seeking behaviours
Figure 1 illustrates the structured questionnaire used to collect patient pathway information, which identified the types of providers consulted, treatments taken, and reasons for these choices.
[Fig 1 about here]
We identified three binary outcomes with a theoretical or empirical link to ABR risk identified in previous studies:[11, 25, 26]
- Self-treatment as a first step (defined as going to a drug shop/pharmacy, seeking advice from friends or family, or using traditional or home remedies) vs seeking help at a medical facility;
- Having two or more steps in the pathway prior to coming to the recruitment centre vs. having fewer steps;
- Taking ABs from any source to treat their symptoms vs not taking any ABs (taking other types of medicine or none)prior to coming to the recruitment clinic.
The last variable was derived from patients’ self-reports of the names of medicines taken during the pathway. During the interview, respondents were prompted using a drug bag or drug card developed specifically for each site.[27]
Other variables
We included self-reported variables that might impact treatment-seeking patterns.[11] Sociodemographic factors included gender (male/female), age (categorised into <25; 25-34; 35-44; 45-54; 55-64; 65+ years), marital status (married, never married, and other, which included cohabiting, widowed, divorced), and household size (1-2 people, 3-6 people, 7+ people). Socioeconomic status was measured by education level (no formal, primary, secondary, and tertiary), employment status (formal employment, informal employment, homemaker, not working), self-reported ability to meet healthcare costs (easy, difficult, very difficult), and a within-country asset index grouped into quintiles (Table S2 for details). Healthcare factors included the level of medical facility the patient was recruited from (lower-level community health centres (levels 2-3) vs. high-level clinics or referral hospitals (levels 4+), and whether they had previous experience of UTI (did not have UTI before, had UTI before, or did not know what UTI was). We also included indicators which measured whether patients felt that UTI symptoms were stigmatised (yes/no), which may impact treatment-seeking.
Statistical Methods
We used Sankey plots to visualise quantitative data on patient pathways, showing counts and percentages of types of providers chosen and type of treatment obtained (if any) at each step. We excluded patients without valid data on the steps considered (n=230), leaving a sample of n=6,378. Subsequently, we used Bayesian hierarchical logistic regression models to assess socioeconomic and attitudinal factors associated with three binary outcomes outlined above (full model specification in supplementary section 3). The models were estimated in R using the Nimble package.[28]Approximately 8% of our sample had missing values on the outcomes or covariates, which we account for within a Bayesian modelling framework. Regression models had four levels: patients were nested in 25 clinics, clinics in nine sites, and sites within three countries. Results were reported in terms of odds ratios (ORs) and 95% highest posterior density intervals (HPDI) due to the skewed posterior distribution of all independent variables.
Qualitative data analysis
Translated English-language interview transcripts were linked to quantitative data using patients IDs, and analysed using NVivo software.[29] We used iterative thematic content analysis, beginning with first-round coding based on interview questions, such as how patients sought treatment and obstacles to treatment-seeking. Subsequent rounds of in-depth coding were undertaken to identify differences and similarities in treatment-seeking pathways between patients, as well as potential contributing factors to decision-making around treatment seeking.