title: Does sunlight exposure improve survival in patients with non-small cell lung cancer?
abstract: BACKGROUND
  Some epidemiological studies reported that sunlight exposure and highvitamin D levels may decrease the morbidity and mortality related to cancer. We aimed to evaluate whether sunlight exposure has an impact on survival in patients with non small cell lung cancer.
  
  
  METHODS
  A total of 546 patients with NSCLC from two different regions (Kayseri and Adana) differing according to sunlight exposure were analysed retrospectively.
  
  
  RESULTS
  The median overall survival (OS) rates were 11. 6 (CI: 9.50-13.6) and 15.6 months (CI: 12.4-18.8) for Kayseri and Adana, respectively, in all patients (p=0.880).
  
  
  CONCLUSIONS
  There were no differences between groups in terms of OS. While there is strong evidence regarding inverse relationship between cancer incidence and sunlight exposure, it is still controversial whether sunlight exposure is a good prognostic factor for survival in patients with lung cancer.
authors.affiliation: Department of Medical Oncology, Acibadem Kayseri Hospital, Kayseri, Turkey E-mail : doktorhasanmutlu@gmail.com.
authors.forename: Hasan
authors.initials: H
authors.lastname: Mutlu
authors.forename: Abdullah
authors.initials: A
authors.lastname: Buyukcelik
authors.forename: Arzu
authors.initials: A
authors.lastname: Aksahin
authors.forename: Mustafa
authors.initials: M
authors.lastname: Kibar
authors.forename: Yasemin Benderli
authors.initials: YB
authors.lastname: Cihan
authors.forename: Eser
authors.initials: E
authors.lastname: Kaya
authors.forename: Ertugrul
authors.initials: E
authors.lastname: Seyrek
authors.forename: Sinan
authors.initials: S
authors.lastname: Yavuz
authors.forename: Abdulsamet
authors.initials: A
authors.lastname: Erden
authors.forename: Zuleyha
authors.initials: Z
authors.lastname: Calikusu
authors.forename: Tuncay
authors.initials: T
authors.lastname: Aslan
authors.forename: Zeki
authors.initials: Z
authors.lastname: Akca
mesh_terms: D002289:Carcinoma, Non-Small-Cell Lung / Q000401:mortality* / Q000473:pathology; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D013472:Sunlight; D015996:Survival Rate; D014421:Turkey / Q000453:epidemiology