Abstract
<b><i>Background:</i></b> Severe fever with thrombocytopenia syndrome (SFTS), an emerging viral infectious disease, is mainly transmitted by ticks in the surrounding environment. Clinical progress and risk factors for prognosis in SFTS patients were not yet fully understood. Thus, the objective of this study was to analyze clinical progression and laboratory data related to the prognosis of South Korean SFTS patients in a single institution from 2014 to 2021. <b><i>Materials and Methods:</i></b> Fifty-three confirmed SFTS patients from August 2014 to September 2021 at Gyeongsang National University Hospital (GNUH) in Jinju, South Korea were enrolled. Electronic medical records of SFTS patients' demographic features, clinical data, and laboratory data were retrospectively reviewed. Risk factors for fatality were statistically analyzed by classifying enrolled patients into fatal and non-fatal groups. <b><i>Results:</i></b> The mean age of patients in the fatal group was significantly higher than that in the non-fatal group (<i>p</i> = 0.036). Hemorrhagic manifestations (<i>p</i> = 0.001) and multiple organ dysfunction (MOD) (<i>p</i> < 0.001) were significantly common in the fatal group. Age, hemorrhagic manifestations, and MOD were also associated with death (<i>p</i> = 0.001, <i>p</i> = 0.008, and <i>p</i> = 0.041, respectively), with adjusted hazard ratios (aHRs) of 1.14, 18.25, and 2.36, respectively. Onset of illness to admission was also significantly associated with death (<i>p</i> = 0.005), with aHR of 0.48. Age, interval from onset of illness to admission, hemorrhagic manifestations, and MOD were found to be variables related to the fatality of SFTS patients. <b><i>Conclusion:</i></b> Laboratory test results showed a significant difference between the fatal group and the non-fatal group, but they did not have a statistically significant effect on the prognosis of SFTS patients.
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