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    Evaluation of Prolonged Rt-Pcr Positivity and Viral Load in COVID-19 Patients
    (2023) Urkmez, Fatma Yekta; Erol, Ozlem; Polat, Esra; Kaygusuz, Sedat
    Aim: Real-time reverse transcription polymerase chain reaction (RT-PCR) test is used in the diagnosis of COVID-19. It was aimed to evaluate the factors affecting the viral conversion time, to examine the relationship between viral load, and to determine other factors that may be associated with viral load. Material and Methods: Patients were hospitalized between 15.03.2020-01.08.2020, and viral conversion detected were evaluated retrospectively. Patients were divided into two according to viral conversion time (0-14 days vs >14 days). Results: 349 patients were included in the study (284 vs 65 patients). The age and gender characteristics were similar. Prolonged PCR positivity group had more death (p=0.036) and lower cycle-threshold (CT) value (p=0.017). In the examination of CT values of 246 patients, 228 patients with viral conversion and 18 patients without viral conversion due to death, the CT value was found to be lower, therefore the viral load was higher in patients over 60 years of age (p=0.006), in the presence of cardiovascular system disease (p<0.001) and in patients who died (p<0.001). Conclusion: Prolonged PCR positivity may indicate excess viral load and adverse outcomes. An evaluation including the patient's age, CT value, comorbid conditions, and viral conversion time can give an idea about the prognosis.
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    Predictive value of c-reactive protein to albumin ratio and systemic immune-inflammation index for the long-term mortality in COVID-19
    (2023) Polat, Esra; Şabanoğlu, Cengiz; Caner, Muhdedir; Urkmez, Fatma Yekta; İnanç, Fulden Akyüz; Öztürk, Ünal; Kandemir, Hüseyin
    Aim: Several studies have investigated the association between biomarkers and short-term prognosis in the coronavirus infectious disease 2019 (COVID-19). However, data on the long-term prognosis are limited. To determine the predictive value of systemic immune-inflammation index (SII) and C-reactive protein (CRP) to albumin ratio (CAR) for in-hospital and 1-year outcomes during COVID-19. Material and Method: The primary outcomes were in-hospital and 1-year mortality. The secondary outcomes were the intensive care unit (ICU) need at admission and transfer to the ICU later on. Results: The study included 449 (53.6%) males and 389 (46.4%) females with a mean age of 53.8±18.5 years. Previously known heart failure (HF), COVID-19-related HF, acute renal failure (ARF), diabetes mellitus, hypertension, coronary artery disease (CAD), chronic obstructive pulmonary disease (COPD)/asthma, high CO-RADS scores (>4), low ejection fraction (EF), higher CAR and SII were associated with an increased in-hospital and 1-year mortality (p<0.05). After multivariate analysis; CAR, SII, ARF, and diabetes mellitus were independent predictors of in-hospital and 1-year mortality,whereas CAD was only an independent predictor of 1-year mortality. After ROC analysis, CAR cut-off levels of 2.54 and 2.23 predicted in-hospital and 1-year mortality, respectively (p<0.001). The SII cut-off levels of 1274 and 1191 predicted in-hospital and 1-year mortality, respectively (p<0.001). Conclusion: CAR and SII can be used as valuable prognostic indexes to predict both the short-term and long-term mortality in COVID-19.