Affiliation:
1. Schneider Institutes for Health Policy Heller School for Social Policy and Management, Brandeis University Waltham Massachusetts USA
2. Research Centre for Health Economics and Evaluation, Faculty of Public Health Mahidol University Bangkok Thailand
3. Department of Dermatology, Faculty of Medicine Siriraj Hospital Mahidol University Bangkok Thailand
4. Escuela de Gobierno Pontificia Universidad Católica de Chile Santiago Chile
5. Research Center for Integrated Disaster Risk Management (CIGIDEN) Santiago Chile
6. CIFAR Azrieli Global Scholars Program Toronto Ontario Canada
Abstract
AbstractBackground and AimsDengue is endemic in Thailand and imposes a high burden on the health system and society. We conducted a prospective cohort study in Umphang District, Tak Province, Thailand, to investigate the share of dengue cases with long symptoms and their duration. Here we present the results of the enrollment process during the COVID‐19 pandemic with implications and challenges for research and policy.MethodsIn a prospective cohort study conducted in Umphang District, Thailand, we examined the prevalence of persistent symptoms in dengue cases. Clinically diagnosed cases were offered free laboratory testing, We enrolled ambulatory dengue patients regardless of age who were confirmed through a highly sensitive laboratory strategy (positive NS1 and/or IgM), agreed to follow‐up visits, and gave informed consent. We used multivariate logistic regressions to assess the probability of clinical dengue being laboratory confirmed. To determine the factors associated with study enrollment, we analyzed the relationship of patient characteristics and month of screening to the likelihood of participation. To identify underrepresented groups, we compared the enrolled cohort to external data sources.ResultsThe 150 clinical cases ranged from 1 to 85 years old. Most clinical cases (78%) were confirmed by a positive laboratory test, but only 19% of those confirmed enrolled in the cohort study. Women, who were half as likely to enroll as men, were underrepresented in the cohort.ConclusionsThe Thai physicians' clinical diagnoses at this rural district hospital had good agreement with laboratory diagnoses. By identifying underrepresented groups and disparities, future studies can ensure the creation of statistically representative cohorts to maximize their scientific value. This involves recruiting and retaining underrepresented groups in health research, such as women in this study. Promising strategies for meaningful inclusion include multi‐site enrollment, offering in‐home or virtual services, and providing in‐kind benefits like childcare for underrepresented groups.
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