LAUSR

Background Few prospective longitudinal studies have been conducted in Thailand to account for the long-term response to chronic urticaria (CU) treatment, clinical outcomes, and patient-reported outcomes (PROs) among people living with CU based on routine practice. As such, a prospective longitudinal study will be conducted to better understand the long-term responses to treatment options and the burden of disease in Thai CU patients. Methods and design This study is a routine clinical practice registry-based, monocentric, prospective, observational longitudinal study in the northern region of Thailand. Adult patients in an outpatient clinic diagnosed with CU, including both chronic spontaneous urticaria and chronic inducible urticaria will be recruited for this study. The cohort will be collected and registered using the joint routine clinical practice data based on multiple datasets including claims outpatient and inpatient data, routine laboratory results, medication utilization, health care costs, clinical characteristics, long-term urticaria care and monitoring, and PRO measures. The point prevalence of adverse health outcomes will be estimated and reported corresponding to 95% confidence intervals (95% CIs). The overall trend analysis will be analyzed to explore the effect of over time across the cohort time frame. Conclusion This prospective longitudinal study will report the clinical outcomes, PROs, and economic burden among Thai people living with CU based on routine clinical practice. Findings will provide comprehensive evidence and could facilitate best practices for CU care management for health care professionals, researchers, policymakers, and public society. Trial registration Thai Clinical Trials Registry (TCTR, thaiclinicaltrials.org) registration TCTR20210706005. Registered on July 6, 2021.