title: Urban traffic-related determinants of health questionnaire (UTDHQ): an instrument developed for health impact assessments.
abstract: BACKGROUND
  Traffic and transport is a substantial part of a range of economic, social and environmental factors distinguished to have impact on human health. This paper is a report on a preliminary section of a Health Impact Assessment (HIA) on urban traffic and transport initiatives, being conducted in Sanandaj, Iran. In this preliminary study, the psychometric properties of Urban Traffic related Determinants of Health Questionnaire (UTDHQ) were investigated.
  
  
  METHODS
  Multistage cluster sampling was employed to recruit 476 key informants in Sanandaj from April to June 2013 to participate in the study. The development of UTDHQ began with a comprehensive review of the literature. Then face, content and construct validity as well as reliability were determined.
  
  
  RESULTS
  Exploratory Factor Analysis showed optimal reduced solution including 40 items and 8 factors. Three of the factors identified were Physical Environment, Social Environment, Public Services Delivery and Accessibility. UTDHQ demonstrated an appropriate validity, reliability, functionality and simplicity.
  
  
  CONCLUSIONS
  Despite the need for further studies on UTDHQ, this study showed that it can be a practical and useful tool for conducting HIAs in order to inform decision makers and stakeholders about the health influences of their decisions and measures.
authors: 1. PhD student in Health Education and Promotion, Department of Health Education and Promotion, School of Health and Health Research Institute, Tehran University of Medical Sciences, Tehran, Iran. nadrian@razi.tums.ac.ir.
authors: Haidar
authors: H
authors: Nadrian
authors: 2. Associate Professor in Epidemiology, Department of Epidemiology and Biostatistics, School of Health, Knowledge Utilization Research Center, Tehran University of Medical Sciences, Tehran, Iran. s_nt@gmail.com.
authors: Saharnaz
authors: S
authors: Nedjat
authors: 3. Associate Professor in Health Promotion, Department of Health Education and Promotion, School of Health, Iran University of Medical Sciences, Tehran, Iran. taghdisi_mh@gmail.com.
authors: Mohammad Hossein
authors: MH
authors: Taghdisi
authors: 4. Professor in Health Education, Department of Health Education and Promotion, School of Health and Health Research Institute, Tehran University of Medical Sciences, Tehran, Iran. shojaei5@yahoo.com.
authors: Davoud
authors: D
authors: Shojaeizadeh
keywords: Factor Analysis; Health Impact Assessment; Psychometric Properties; Questionnaire; Social Determinants of Health; Urban traffic