title: Construction and Validation the Lifestyle Questionnaire Related to Cancer.
abstract: BACKGROUND
  Healthy lifestyle is a significant factor in cancer etiologic and prevention of cancer. There are instruments to measure a healthy life style, but the lifestyle questionnaires only examine one or a few more aspects of lifestyle.
  
  
  OBJECTIVE
  The purpose of this study was to construct a comprehensive instrument to examine all aspects of lifestyle related to cancer.
  
  
  METHODS
  This study was a cross-sectional study that was conducted in Yazd city in Iran. A questionnaire was designed to assess and measure various aspects of lifestyle related to cancer using similar studies. Researchers used the Cronbach's alpha and test-retest method to determine the reliability. Also, construct validity was determined using the factor analysis method in SPSS 16 software.
  
  
  RESULTS
  Face validity was examined using a panel of experts. Cronbach's alpha for the whole scale was appropriate (α = 0.87). Also, Cronbach's alpha for all dimensions of questionnaire was acceptable (perfect score). Test-retest method was used to determine the reliability. The results indicated that ICC was in the range of 0.84 to 0.94. Based on the obtained results of factor analysis method, 8 dimensions of the questionnaire were extracted (physical health, physical activity and exercise, mental health, drug and alcohol avoidance, balanced consumption of food, environmental pollutants and harmful substances, weight control and nutrition, and reproductive health).
  
  
  CONCLUSIONS
  This study showed that the present questionnaire can be used as a valid and reliable tool for collecting data about the lifestyle of people related to cancer.
authors.affiliation: Research Center of Prevention and Epidemiology of Non-Communicable Disease, Shahid Sadoughi University of Medical Sciences, Yazd, IR Iran.
authors.forename: Mahdieh
authors.initials: M
authors.lastname: Momayyezi
authors.affiliation: Research Center of Prevention and Epidemiology of Non-Communicable Disease, Shahid Sadoughi University of Medical Sciences, Yazd, IR Iran.
authors.forename: Hossein
authors.initials: H
authors.lastname: Fallahzadeh
authors.affiliation: Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, IR Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Momayyezi
keywords: Lifestyle; Neoplasms; Questionnaires