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    Biosimilar filgrastim vs filgrastim: a multicenter nationwide observational bioequivalence study in patients with chemotherapy-induced neutropenia
    (Dove Medical Press Ltd, 2018) Sevinc, Alper; Ozkan, Metin; Ozet, Ahmet; Dane, Faysal; Oksuzoglu, Berna; Isikdogan, Abdurrahman; Ozdemir, Feyyaz
    Background: We studied the comparative effectiveness of biosimilar filgrastim vs original filgrastim in patients with chemotherapy-induced neutropenia. Patients and methods: This multicenter, observational study was conducted at 14 centers. The study included 337 patients experiencing neutropenia under chemotherapy. Patients were given either filgrastim 30 MIU or 48 MIU (Neupogen (R)) or biosimilar filgrastim 30 MIU (Leucostim (R)). Data regarding age, chemotherapeutic agents used, number of chemotherapy courses, previous diagnosis of neutropenia, neutrophil count of patients after treatment, medications used for the treatment of neutropenia, and duration of neutropenia were collected. Time to absolute neutrophil count (ANC) recovery was the primary efficacy measure. Results: Ambulatory and hospitalized patients comprised 11.3% and 45.1% of the enrolled patients, respectively, and a previous diagnosis of neutropenia was reported in 49.3% of the patients, as well. Neutropenia occurred in 13.7% (n=41), 45.5% (n=136), 27.4% (n=82), 11.4% (n=34), and 2.0% (n=6) of the patients during the first, second, third, fourth, and fifth cycles of chemotherapy, respectively. While the mean neutrophil count was 0.53 +/- 0.48 before treatment, a significant increase to 2.44 +/- 0.66 was observed after treatment (p=0.0001). While 90.3% of patients had a neutrophil count,1.49 before treatment, all patients had a neutrophil count >= 1.50 after treatment. Neutropenia resolved within <= 4 days of filgrastim therapy in 60.1%, 56.7%, and 52.6% of the patients receiving biosimilar filgrastim 30 MIU, original filgrastim 30 MIU, and original filgrastim 48 MIU, respectively. However, there was no significant difference between the three arms (p=0.468). Similarly, time to ANC recovery was comparable between the treatment arms (p=0.332). Conclusion: The results indicate that original filgrastim and biosimilar filgrastim have comparable efficacy in treating neutropenia. Biosimilar filgrastim provides a valuable alternative; however, there is need for further studies comparing the two products in different patient subpopulations.
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    Gastric cancer in Turkey
    (Oxford Univ Press, 2006) Icli, Fikri; Yalcin, Bulent; Ozdemir, Feyyaz; Isikdogan, Abdurrahman; Celik, Ismail; Unsal, Diclehan; Coskun, Senol
    [Abstract Not Available]
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    Öğe
    Opinions of the Turkish population on cancer and being informed of the diagnosis of cancer
    (Tubitak Scientific & Technological Research Council Turkey, 2015) Yalcin, Abdussamed; Silay, Kamile; Buyukcelik, Abdullah; Isikdogan, Abdurrahman; Turk, Haci Mehmet; Coskun, Hasan Senol; Ozdemir, Feyyaz
    Background/aim: An opinion survey was conducted to investigate the opinions and attitudes of the Turkish population regarding cancer if they or one of their family members were to receive a diagnosis of cancer. Materials and methods: The opinion survey was completed by 6566 subjects and consisted of questions about the demographics of the participants and their overall opinions about cancer. The other points of the investigation asked whether they would inform relatives who had cancer about the diagnosis and whether they would prefer to be informed if they were the one with the cancer diagnosis. Results: The median age of the participants was 33 years (range: 18-100) and 53.3% were male. It was found that 57.7% of the participants would prefer not to disclose a cancer diagnosis to their first-degree relatives. The diagnosis had been disclosed to relatives with cancer in 69.9% of cases. When asked about their overall opinion of cancer management, 76.5% of participants were optimistic, 16.3% were pessimistic, and 2.9% had mixed opinions. Conclusion: This study represents one of the largest surveys done in Turkey to identify the thoughts of healthy people about cancer and their opinion on informing their relatives about the diagnosis if the relatives have cancer. It is comparable with reports from East Europe and Asian countries.