title: Inter-rater reliability of measures to characterize the tobacco retail environment in Mexico.
abstract: OBJECTIVE
  To evaluate the inter-rater reliability of a data collection instrument to assess the tobacco retail environment in Mexico, after major marketing regulations were implemented.
  
  
  METHODS
  In 2013, two data collectors independently evaluated 21 stores in two census tracts, through a data collection instrument that assessed the presence of price promotions, whether single cigarettes were sold, the number of visible advertisements, the presence of signage prohibiting the sale of cigarettes to minors, and characteristics of cigarette pack displays. We evaluated the inter-rater reliability of the collected data, through the calculation of metrics such as intraclass correlation coefficient, percent agreement, Cohen's kappa and Krippendorff's alpha.
  
  
  RESULTS
  Most measures demonstrated substantial or perfect inter-rater reliability.
  
  
  CONCLUSIONS
  Our results indicate the potential utility of the data collection instrument for future point-of-sale research.
authors.affiliation: Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, Carolina del Norte, Estados Unidos de América.
authors.forename: Marissa G
authors.initials: MG
authors.lastname: Hall
authors.affiliation: Department of Health Promotion, Education and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, Carolina del Sur, Estados Unidos de América.
authors.forename: Christy
authors.initials: C
authors.lastname: Kollath-Cattano
authors.affiliation: Departamento de Investigación sobre Tabaco, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Luz Myriam
authors.initials: LM
authors.lastname: Reynales-Shigematsu
authors.affiliation: Department of Health Promotion, Education and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, Carolina del Sur, Estados Unidos de América.
authors.forename: James F
authors.initials: JF
authors.lastname: Thrasher
mesh_terms: D000329:Advertising / Q000331:legislation & jurisprudence; D000367:Age Factors; D003132:Commerce; D003625:Data Collection / Q000379:methods*; D006801:Humans; D040541:Marketing / Q000331:legislation & jurisprudence*; D008800:Mexico / Q000453:epidemiology; D015588:Observer Variation; D012907:Smoking / Q000453:epidemiology; D000074606:Smoking Prevention; D062789:Tobacco Products / Q000191:economics