Akciğer Kanseri Hastalarının Ölüm Risklerinin Zayıflık Modelleri ile Değerlendirilmesi
Year 2020,
Volume: 10 Issue: 4, 647 - 651, 30.12.2020
Özge Pasin
,
Şirin Çetin
,
İsa Dede
Abstract
GİRİŞ ve AMAÇ: Bu çalışmanın amacı; akciğer kanseri verisini analiz etmek için en uygun sağkalım modelini seçim kriterleri ile değerlendirerek akciğer kanseri verisinin prognostik faktörlerini ortaya çıkarmaktır.
YÖNTEM ve GEREÇLER: Çalışmada Mustafa Kemal Üniversitesi Tıp Fakültesi Tıbbi Onkoloji Polikliniğinden 185 akciğer kanseri tanısı almış hastaya ait veriler geriye dönük olarak hasta dosyalarından elde edilmiştir. Bireylerin arasındaki heterojenliklerin değerlendirilmesi amacıyla farklı dağılımlara sahip zayıflık modelleri kurulmuştur. Modeller AIC ve BIC kriterlerine göre değerlendirilmiştir.
BULGULAR: Çalışmadaki akciğer kanserli hastalara ait medyan sağkalım süresi 11 ay (%95 güven aralığı 9.57-12.42) olarak elde edilmiştir. Temel hazard fonksiyonu loglogistik ve zayıflık dağılımı lognormal olan zayıflık modeli en iyi model olarak belirlenmiştir. Bu modele ait sonuçlar incelendiğinde, albumin değişkeninin akciğer kanseri hastaların ölüm riski üzerine etkisi istatistiksel olarak anlamlı bulunmuştur (p=0.018).
TARTIŞMA ve SONUÇ: Genellikle akciğer kanseri hastalarının yaşam süresini etkileyen değerlendirmeye alınamayan çevresel ve genetik faktörlerin etkisi vardır. Dolayısıyla, akciğer kanseri hastalarının yaşam süresini etkileyen faktörler değerlendirilirken bireyler arasındaki heterojenliklerden kaynaklanan zayıflık teriminin de dikkate alınması alınması gerekmektedir.
References
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Evaluation of Death Risks of Lung Cancer Patients with Frailty Models
Year 2020,
Volume: 10 Issue: 4, 647 - 651, 30.12.2020
Özge Pasin
,
Şirin Çetin
,
İsa Dede
Abstract
OBJECTIVE:The aim of this study is to investigate the prognostic factors of lung cancer by evaluating the most appropriate survival model with a selection criteria.
MATERIAL AND METHODS:In the study, the data of 185 patients diagnosed with lung cancer from the Medical Oncology Outpatient Clinic of Mustafa Kemal University Faculty of Medicine were retrospectively obtained from the patient files. The frailty models with different distributions were used for evaluating the heterogeneity between patients. Model selections were made according to AIC and BIC criteria.
RESULTS:The median survival time of patients with lung cancer in the study was 11 months (95% confidence interval 9.57-12.42). The best frailty models’ frailty distribution was lognormal and the basic hazard function distribution was loglogistic. The best model results showed that, the effect of the albumin variable on the risk of death of lung cancer patients was statistically significant (p = 0.018).
CONCLUSIONS:Generally, environmental and genetic factors that affect the survival time of lung cancer patients can not be evaluated.Thus, the term of the frailty resulting from the heterogeneity of factors when assessing individuals influencing survival of patients with lung cancer should be taken into account.
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- 8.Shields TW. Surgical Treatment of nonsmall cell lung cancer. In: Shields TW, Reed EW (eds). General Thoracic Surgery. 5th edition. Philadelphia: Lippincott Williams & Wilkins; 2000. 1311-41)
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