Tokyo, April 1 -- UMIN Clinical Trials Registry (UMIN-CTR) received information related to the study (UMIN000061108) titled 'A study examining medical costs after minor traffic accident injuries and differences across medical providers' on April 1.

Study Type: Observational

Primary Sponsor: Institute - Osaka Yukioka College of Health Science

Condition: Condition - cervical sprain, lumbar sprain Classification by malignancy - Others Genomic information - NO

Objective: Narrative objectives1 - Musculoskeletal pain is common in Japan and is associated with increased healthcare costs. After motor vehicle accidents, minor injuries such as cervical and lumbar sprains often lead to repeated outpatient visits and high claimed costs, particularly under compensation systems financed by third-party payers. Variation in healthcare utilization and claimed costs across regions and providers is not fully explained by clinical need. Cost concentration, in which a small subset of patients or facilities accounts for a large share of total costs, is also recognized. In compensation systems, healthcare utilization may be influenced by administrative processes and financial incentives as well as clinical need. However, quantitative evidence on facility-level variation and cost concentration for minor injuries remains limited. Compensation has been associated with prolonged symptoms, extended care, and higher costs, while limiting compensation may reduce claims. Psychosocial factors are also related to persistent symptoms and care seeking. In Japan, claimed costs are associated with occupation, region, and care across multiple institutions. Our previous study found no association between accident severity and treatment duration or visit frequency. Care is mainly reimbursed on a fee-for-service basis under the compulsory automobile liability insurance system, and per-visit compensation and wage-loss benefits may influence care-seeking behavior. Basic objectives2 - Others

Eligibility: Age-lower limit - Not applicable Age-upper limit - Not applicable Gender - Male and Female Key inclusion criteria - The data provided by the General Insurance Rating Organization of Japan was used, and the selection criteria were as follows: (1) injuries resulting from a motor vehicle accident (rear-end collision, contact, or impact), (2) primary diagnosis of lumbar sprain, (3) medical treatment covered by compulsory automobile liability insurance, (5) compensation using compulsory automobile liability insurance completed between June 2014 and December 2019, and (6) damages due to injury of 400,000 yen or less with no permanent disability (a minor category in Japan's no-fault government compensation), or damages due to injury of less than 1,200,000 yen with permanent disability (a minor permanent disability in Japan's no-fault government compensation). Key exclusion criteria - Exclusion criteria included patients who suffered fractures, dislocations, or spinal cord injuries during litigation related to traffic accidents, and those with missing data. Target Size - 284139

Recruitment Status: Recruitment status - No longer recruiting Date of protocol fixation - 2026 Year 02 Month 01 Day Date of IRB - 2020 Year 05 Month 28 Day Anticipated trial start date - 2026 Year 02 Month 01 Day Last follow-up date - 2026 Year 12 Month 31 Day

To know more, visit https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000069928

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