title: Comparing health status in Belarus between 2001-10: a novel method using surveys with different response categories.
abstract: BACKGROUND
  Two population surveys were conducted in Belarus: The Living Conditions, Lifestyle and Health (LLH) in 2001 (n = 2000) and The Health in Times of Transition (HITT) in 2010 (n = 1800). Each survey included a question on health status. The LLH questionnaire provided a 4-point Verbal Response Scale, but the HITT questionnaire used a 5-point scale. When translated into Russian, only two response categories of these scales had identical wording. These differences made a direct comparison of self-reported health status between 2001 and 2010 difficult.
  
  
  METHODS
  We conducted a Health Category Response Scale (HCRS) survey in 2010 (n = 570) using a 100ths graduated Visual Analogue Scale (VAS) to understand how the response categories of different scales are perceived by Russian speakers. We implemented the HCRS survey's data to calculate the weighted health status (WHS) for each of the original surveys and to compare health status in Belarus between 2001and 2010.
  
  
  RESULTS
  The WHS in Belarus showed a small, but statistically significant, improvement of 2.9 points on a 0-100 scale between 2001 and 2010 (56.2 vs. 59.1). Identical response categories were perceived differently on a 4-point and 5-point VAS. The category 'good' ('Хорошее') measured ∼12 points higher, and the category 'bad/poor' ('Плохое') measured ∼16 points lower, on the 4-point compared with the 5-point VAS.
  
  
  CONCLUSIONS
  Our HCRS survey and novel method enabled a direct comparison of questions with different response options. When applied to the LLH and HITT projects, we concluded that health status in Belarus has improved between 2001 and 2010.
authors.affiliation: 1 Division of Applied Health Sciences, School of Medicine and Dentistry, College of Life Science and Medicine, University of Aberdeen, Aberdeen, UK.
authors.forename: Alena
authors.initials: A
authors.lastname: Vasianovich
authors.forename: Neil W
authors.initials: NW
authors.lastname: Scott
authors.forename: William C S
authors.initials: WC
authors.lastname: Smith
authors.forename: Claire D
authors.initials: CD
authors.lastname: Wallace
authors.forename: Ludmila L
authors.initials: LL
authors.lastname: Shebeko
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006304:Health Status; D006306:Health Surveys / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D002094:Republic of Belarus / Q000453:epidemiology; D057566:Self Report; D055815:Young Adult