Faculty of Medicine

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    Peripheral glutamate and TNF-α levels in patients with intracerebral hemorrhage: Their prognostic values and interactions toward the formation of the edemal volume
    (VM Media SP. zo.o VM Group SK, 2018-03)
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    Aleksovski, Boris
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    Stojanov, Dragan
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    Aleksovski, Vasko
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    Mihajlovska Rendevska, Ana
    We aimed to evaluate the prognostic values, contribution and interactions of the peripheral blood plasma glutamate and tumor-necrosis factor-α (TNF-α) levels toward the formation of the perifocal edema in patients with intracerebral hemorrhage (ICH).
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    Surgical Outcome in Patients with Spontaneous Supratentorial Intracerebral Hemorrhage
    (Walter de Gruyter GmbH, 2017-12-01)
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    Stojanov, Dragan
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    Aleksovski, Boris
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    Mihajlovska Rendevska, Ana
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    <jats:title>Summary</jats:title> <jats:p>The aim of the paper was to evaluate the surgical outcome in patients with spontaneous supratentorial intracerebral hemorrhage (ICH) after surgical intervention, in respect to the initial clinical conditions, age, sex, hemispheric side and anatomic localization of ICH. Thirty-eight surgically treated patients with spontaneous supratentorial intracerebral hemorrhage were included in the study. The surgical outcome was evaluated three months after the initial admission, according to the Glasgow Outcome Scale (GOS). The surgical treatment was successful in 14 patients (37%), whereas it was unsuccessful in 24 patients (63%). We have detected a significant negative correlation between the Glasgow Coma Scale (GCS) scores on admission and the GOS scores after three months, suggesting worse neurological outcome in patients with initially lower GCS scores. The surgical outcome in patients with ICH was not affected by the sex, the hemispheric side and the anatomic localization of ICH, but the age of the patients was estimated as a significant factor for their functional outcome, with younger patients being more likely to be treated successfully. The surgical outcome is affected from the initial clinical state of the patients and their age. The treatment of ICH is still an unsolved clinical problem and the development of new surgical techniques with larger efficiency in the evacuation of the hematoma is necessary, thus making a minimal damage to the normal brain tissue, as well as decreasing the possibility of postoperative bleeding.</jats:p>
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    Modeling prognostic factors for poor neurological outcome in conservatively treated patients with intracerebral hemorrhage: A focus on TNF-α
    (Elsevier BV, 2018-09)
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    Aleksovski, Boris
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    Stojanov, Dragan
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    Mihajlovska Rendevska, Ana
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    Aleksovski, Vasko
    Prognostic models for Intracerebral hemorrhage (ICH), mainly based on clinical evaluation, have remained inherently confounded by subjective scoring assessments and limited accuracy. In this study, we aimed at assessing the risk for poor outcome after ICH based on peripheral biochemical markers (TNF-α, glutamate and glucose) and radiological variables (both at admission and five days after patient's care), for modeling purposes of prognostication.
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    Item type:Publication,
    Effects of data transformation on multivariate analyses in intracerebral hemorrhage
    (Macedonian Pharmaceutical Association, 2016)
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    Aleksovski, Boris
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    Kolevska, Milena
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    Stojanov, Dragan
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    <jats:p>Multivariate statistical approaches have been increasingly applied in hemorrhagic stroke data analysis. Nevertheless, several aspects regarding their relevance and validity in respect of the application of data transformations have not been studied in details. This paper examines the effects of different data transformations in the standard statistical methods of the multivariate analysis of the intracerebral hemorrhage (ICH) parameters in small group samples. Two different methods for data transformations (log transformation (log(Xi )), square root transformation (√Xi ))have been carried out. The initial volume of the ICH have been studied using several test for skewness, kurtosis, histogram distribution method and different quartile-quartile (Q-Q) and probability-probability (P-P) plots as criteria for normal distribution. Multivariate analyses for the prediction of the perifocal edema was performed using raw and transformed data. Our results indicate that the data transformation operations should be performed very carefully because different analytical outputs lead to different scientific conclusions.</jats:p>
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    Inflammatory and oxidative stress markers in intracerebral hemorrhage: Relevance as prognostic markers for quantification of the edema volume
    (Wiley, 2023-03)
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    Aleksovski, Boris
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    Mihajlovska Rendevska, Ana
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    We aimed to analyze the inflammatory and oxidative stress (OS) markers after intracerebral hemorrhage (ICH) and their temporal changes, interaction effects, and prognostic values as biomarkers for the prediction of the edema volume. Our prospective, longitudinal study included a cohort group of 73 conservatively treated patients with ICH, without hematoma expansion or intraventricular bleeding, which were initialized with the same treatment and provided with the same in-hospital care during the disease course. Study procedures included multilevel comprehensive analyses of clinical and neuroimaging data, aligned with the exploration of 19 inflammatory and five OS markers. White blood cells (WBC), C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), neutrophilia, and lymphopenia peaked 3 days post-ICH, and they showed much stronger correlations with clinical and neuroimaging variables, when compared to the admission values. An intricate interplay among inflammatory (WBC, CRP, neutrophils, neutrophil-to-lymphocyte ratio [NLR], interleukin (IL)-6, and IL-10) and OS mechanisms (catalase activity and advanced oxidation protein products [AOPP]) was detected operating 3-days post-ICH, being assessed as relevant for prediction of the edema. The overall results suggested complex pathology of formation of post-ICH edema, via: (A) Not additive, but statistically significant synergistic interactions between CRP-ESR, neutrophils-CRP, and neutrophils-IL-6 as drivers for the edema formation; (B) Significant antagonistic effect of high protein oxidation on the CRP-edema dependence, suggesting a mechanism of potential OS-CRP negative feedback loop and redox inactivation of CRP. The final multiple regression model separated the third-day variables NLR, CRP × AOPP, and WBC, as significant prognostic biomarkers for the prediction of the edema volume, with NLR being associated with the highest effect size. Our developed mathematical equation with 3D modeling for prediction and quantification of the edema volume might be beneficial for taking timely adequate strategies for prevention of delayed neurological deteriorations.