title: Relative effect of socio-economic status on the health-related quality of life in type 2 diabetic patients in Iran.
abstract: OBJECTIVE
  Type II diabetes mellitus (T2DM) is a progressing epidemic and a major cause of mortality and morbidity worldwide. The quality of life (QoL) of diabetic patients has been strongly influenced by socioeconomic status (SES) in developed countries. Therefore, the QoL improvement is considered to be a major goal in diabetes control program. In this context, there is no reliable evidence for developing countries. In this study, the relative association of SES with health-related quality of life (HRQoL) was assessed in patients with T2DM in Iran.
  
  
  METHODS
  The "Cost estimation of Type 2 Diabetes in Iran" was used for secondary data analysis. The socio-economic status has been assessed by Categorical principal component analysis (CATPCA) techniques and HRQoL, using EQ-5D Visual Analog Scale, modified for digit preferences. Age, gender, education, occupation, SES, marital status, residency, education (T2DM related), diagnostic methods, number of annual care, type of treatment and Duration of disease awareness were used as independent variables in the multivariable linear regression model. Statistical analysis was performed using Stata software version 11.2.
  
  
  RESULTS
  The response rate was 88.6%. Out of 3472 patients, 2128 were female and about 78.7% were from urban areas. All variables associated with T2DM were significant at the level of 0.05 except, the type of treatment, residency and education. Standardized regression coefficient for SES was estimated as 0.106 (p-value<0.0001).
  
  
  CONCLUSIONS
  It seems that the SES of households in developing countries has a meaningful effect on the HRQoL of patients with T2DM as well as developed countries.
authors.affiliation: Department of Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Hosseini Nejhad
authors.forename: Hossein
authors.initials: H
authors.lastname: Molavi Vardanjani
authors.forename: Farid
authors.initials: F
authors.lastname: Abolhasani
authors.forename: Maryam
authors.initials: M
authors.lastname: Hadipour
authors.forename: Khodadad
authors.initials: K
authors.lastname: Sheikhzadeh
mesh_terms: D000328:Adult; D000671:Amputation, Surgical / Q000523:psychology / Q000706:statistics & numerical data; D000704:Analysis of Variance; D015992:Body Mass Index; D003924:Diabetes Mellitus, Type 2 / Q000150:complications / Q000191:economics / Q000453:epidemiology; D003925:Diabetic Angiopathies / Q000453:epidemiology; D003928:Diabetic Nephropathies / Q000453:epidemiology; D003930:Diabetic Retinopathy / Q000453:epidemiology; D004522:Educational Status; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006304:Health Status; D006305:Health Status Indicators; D006801:Humans; D007492:Iran / Q000453:epidemiology; D008297:Male; D008403:Mass Screening / Q000191:economics; D008875:Middle Aged; D010147:Pain Measurement; D011788:Quality of Life; D019057:Quality-Adjusted Life Years; D012044:Regression Analysis; D012307:Risk Factors; D012923:Social Class; D011795:Surveys and Questionnaires
keywords: Diabetes mellitus; Iran; Quality of life; Social class; Type 2