Tugba Onyilmaz

Dr. Tugba Onyilmaz

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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16 January 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
OBOzgur Baris
Ozgur Baris
TOTugba Onyilmaz
Tugba Onyilmaz
HKHuseyin Kaya
Huseyin Kaya
Background: CABG is a commonly performed procedure to improve survival and quality of life in patients with coronary artery disease. Despite advances in surgical techniques and perioperative care, postoperative pneumonia remains a serious complication contributing to increased morbidity, mortality and healthcare costs. This study aims to evaluate the incidence of postoperative pneumonia (POP) and identify its risk factors in patients undergoing isolated CABG. Methods: This retrospective study analyzed 430 patients who underwent CABG between 2019 and 2024. Patient demographics, clinical characteristics, surgical details and laboratory data were collected. Statistical analysis included univariate and multivariate logistic regression to identify significant predictors of pneumonia. Results: The incidence of POP after CABG was 10% (43/430). In patients with POP, diabetes mellitus (p = 0.03) and chronic kidney disease (p = 0.048) prevalence was higher, cardiopulmonary bypass (CPB) (p = 0.01) and cross-clamp time (p = 0.003) was longer, LDH levels (p = 0.017) were higher, hemoglobin (p = 0.012) and albumin (p = 0.015) levels were lower, and lymphocyte % (p = 0.04) was lower; prevalence of COPD and length of stay (LOS) in hospital tended to be higher (both p < 0.06). Multivariate binary logistic regression identified COPD (OR 4.383, 95% CI: 1.106–17.363, p = 0.035), CPB time (OR 1.013, 95% CI: 1.001–1.025, p = 0.030) and LOS (OR 1.052, 95% CI: 1.004–1.103, p = 0.035) as independent predictors of POP. Conclusions: Postoperative pneumonia is a common complication after CABG and is strongly associated with preoperative COPD, CPB time and length of stay in hospital. These findings underline the importance of preoperative risk assessment and optimization. Early identification of high-risk patients may allow targeted strategies such as enhanced respiratory support and prophylactic antibiotics to reduce the incidence of pneumonia and improve clinical outcomes.

1 October 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
TOTugba Onyilmaz
Tugba Onyilmaz
SBSerap Argun Baris
Serap Argun Baris
HKHuseyin Kaya
Huseyin Kaya
APAyse Zeynep Pehlivan
Ayse Zeynep Pehlivan
HAHanife Albayrak
Hanife Albayrak
IBIlknur Basyigit
Ilknur Basyigit
Background: Sarcoidosis is a systemic granulomatous disease with a highly variable clinical course, and distinguishing it from other diseases and predicting its prognosis can be challenging. In recent years, hematological and biochemical parameters have been investigated as potential biomarkers for assessing inflammation and predicting disease prognosis. This study aimed to evaluate the prognostic value of the lactate dehydrogenase-to-albumin ratio (LAR), neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR) and lymphocyte-to-monocyte ratio (LMR). Methods: This retrospective, single-center study included 369 newly diagnosed patients with sarcoidosis who were admitted between January 2020 and October 2024. Sarcoidosis was diagnosed based on current ERS, ATS, and WASOG guidelines. At the 6-month follow-up, patients’ clinical courses were classified as regression, stable, or progression based on clinical, radiological, and pulmonary function tests. The predictive values of various hematological and biochemical parameters were analyzed using statistical methods, including binary logistic regression analysis and ROC analysis. Results: A total of 369 patients were included in the study. At the 6-month follow-up, 63.4% of patients showed regression, 21.4% had a stable course, and 15.2% showed progression. The progression group had a significantly higher LAR (5.26 [4.21–7.76]) compared to the stable/regression group (4.59 [3.82–5.86]) (p = 0.033). Additionally, baseline FVC% (OR, 0.97; p = 0.036) and the presence of dyspnea (OR, 3.08; p = 0.03) were identified as independent risk factors for disease progression. No significant associations were found between NLR, PLR, LMR, and serum ACE levels and the clinical course. The cutoff value of LAR for predicting disease progression was 4.87 (AUC: 0.605), with a sensitivity of 58.8% and specificity of 59.7%. Conclusions: Our study, which is the first to evaluate the prognostic value of LAR in sarcoidosis, identified this parameter as a significant indicator for the clinical course. The finding of significantly higher LAR levels in patients with disease progression suggests its potential as a prognostic biomarker. These results may help guide treatment and follow-up strategies, although further large-scale prospective studies are needed for validation.

1 March 2022 in Turkish Thoracic Journal
Verified
Journal Article
Open access
DKDeniz Kızılırmak
Deniz Kızılırmak
DKDilek Karadoğan
Dilek Karadoğan
HYHalime Yildirim
Halime Yildirim
FAFatma Tokgoz Akyil
Fatma Tokgoz Akyil
AAAyse Tana Aslan
Ayse Tana Aslan
MAMetin Akgün
Metin Akgün
Respiratory diseases,Lung health,European Respiratory Society,congress highlights

25 December 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
TOTugba Onyilmaz
Tugba Onyilmaz
SBSerap Argun Baris
Serap Argun Baris
BOBengugul Ozturk
Bengugul Ozturk
GKGözde Öksüzler Kızılbay
Gözde Öksüzler Kızılbay
GGGozde Selvi Guldiken
Gozde Selvi Guldiken
IBIlknur Basyigit
Ilknur Basyigit
Background/Objectives: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive fibrotic interstitial lung disease with high mortality and limited treatment options. Despite recent therapeutic advances, predicting survival remains challenging. Given the challenge of predicting disease progression in IPF, identifying reliable prognostic markers may support individualized treatment strategies, guide follow-up intensity, and improve clinical decision making. This study aimed to evaluate mortality rates and factors associated with poor prognosis in patients with IPF over a 10-year period at a tertiary care center. Methods: Medical records of 268 patients diagnosed with IPF between 2015 and 2024 were retrospectively reviewed. Demographic characteristics, comorbidities, radiological findings, pulmonary function test results, frequency of exacerbations and hospitalizations, treatment details, and survival outcomes were analyzed. Univariate and multivariate logistic regression analyses were performed to identify predictors of mortality. Results: This study included 268 patients (77.2% male; median age, 72 years). During a median follow-up of 24 months, 44% (n = 118) of patients died. Deceased patients were older (p < 0.001) and had higher rates of coronary artery disease, pulmonary embolism, pulmonary hypertension, and malignancy (all p < 0.05). A definite UIP pattern was more common among deceased patients (71.2% vs. 52.4%, p = 0.02). Acute exacerbations (23.3% vs. 8.1%) and hospitalizations (61.9% vs. 23.3%) were significantly more frequent in this group (p < 0.001). In multivariate analysis, GAP score (OR 11.68, p = 0.001), pulmonary hypertension (OR 15.39, p = 0.02), history of exacerbation (OR 56.2, p = 0.04), baseline FVC (OR 1.10, p = 0.02), mean platelet volume (OR 0.29, p = 0.01), and AST level (OR 1.12, p = 0.04) were independent predictors of mortality. Conclusions: Despite advances in management, IPF continues to carry a high mortality risk. This study represents one of the largest single-center IPF cohorts from our region with long-term real-life follow-up and additionally evaluates laboratory biomarkers such as MPV and AST, which have not been widely investigated as prognostic indicators in IPF. Advanced age, reduced pulmonary function, comorbidities, and acute exacerbations are major prognostic factors. Early recognition and proactive management of these parameters may help improve survival outcomes.

25 September 2026 in Biomedicines
Verified
Journal Article
Open access
PDF file
TOTugba Onyilmaz
Tugba Onyilmaz
GKGözde Öksüzler Kızılbay
Gözde Öksüzler Kızılbay
HKHuseyin Kaya
Huseyin Kaya
SBSerap Argun Baris
Serap Argun Baris
BOBengugul Ozturk
Bengugul Ozturk
IBIlknur Basyigit
Ilknur Basyigit
Background/Objectives: Idiopathic pulmonary fibrosis (IPF) frequently coexists with comorbidities that may influence clinical outcomes. The Charlson Comorbidity Index (CCI) quantifies the weighted comorbidity burden, whereas the age-adjusted Charlson Comorbidity Index (ACCI) additionally incorporates age. We evaluated the associations of CCI and ACCI with pulmonary function, disease severity, clinical course, and mortality in IPF. Methods: This retrospective, single-center cohort study included 319 patients with IPF. Comorbidities present at diagnosis were scored using the CCI and ACCI. Associations with pulmonary function, GAP index, acute exacerbations, hospitalization, long-term oxygen therapy, echocardiographic findings suggestive of pulmonary hypertension, incident malignancy, antifibrotic treatment, and mortality were assessed. Correlation analyses were performed using Spearman’s rank correlation coefficient, and Bonferroni correction was applied to account for multiple testing. Multivariable Cox proportional hazards regression was used to evaluate whether the CCI or ACCI was independently associated with survival. Time-to-event analyses were performed using Kaplan–Meier survival analysis. Results: The mean age was 71 ± 8 years, 78.1% were male, and 75.5% had at least one comorbid condition among patients with available comorbidity data. The median CCI and ACCI scores were 2 (IQR, 0–4) and 5 (IQR, 4–7), respectively. Higher CCI and ACCI categories were associated with hospitalization (p = 0.006 and p = 0.011), echocardiographic findings suggestive of pulmonary hypertension (both p = 0.002), and incident malignancy (p < 0.001 and p = 0.005, respectively). After Bonferroni correction, higher CCI and ACCI categories remained significantly associated with echocardiographic findings suggestive of pulmonary hypertension (both p = 0.002) and incident malignancy (both p < 0.001), whereas the associations with hospitalization did not remain statistically significant. A nominal association between ACCI and mortality (p = 0.044) also did not remain significant after Bonferroni correction. In Spearman analyses, ACCI remained significantly correlated with current age, age at IPF diagnosis, and the GAP index after correction, whereas the correlations of CCI and ACCI with baseline DLCO did not. Neither CCI (HR = 1.029, 95% CI: 0.923–1.146; p = 0.610) nor ACCI (HR = 1.035, 95% CI: 0.936–1.144; p = 0.509) was independently associated with survival in multivariable Cox regression analyses. Lower baseline DLCO remained independently associated with survival in both Cox models (both p < 0.001).Kaplan–Meier survival curves were constructed according to the predefined CCI and ACCI score categories (0, 1–2, 3–4, and ≥5), and survival distributions across categories were compared using the log-rank test. Conclusions: CCI and ACCI were associated with selected clinical characteristics in IPF, particularly echocardiographic findings suggestive of pulmonary hypertension and incident malignancy. However, neither index independently predicted survival after multivariable adjustment. These indices may complement, rather than replace, disease-specific physiological assessments in patients with IPF.