Socio- Demographic, Clinical and Lifestyle Determinants of Low Response Rate on a Self- Reported Psychological Multi-Item Instrument Assessing the Adults’ Hostility and its Direction: ATTICA Epidemiological Study (2002-2012)

Background: Missing data constitutes a common phenomenon, especially, in questionnaire-based, population surveys or epidemiological studies, with the statistical power, efficiency and validity of conducted analyses being significantly affected by missing information. The aim present work was to investigate socio-demographic, lifestyle clinical determinants low response rate self- rating multi-item scale, estimating individuals’ hostility direction hostility. Methods: 3042 apparently healthy volunteers residing Athens metropolitan area participated ATTICA study [1514 (49.8%) were men [46 years old (SD= 13 years)] 1528 (50.2%) women [45 14 years)]]. Hostility Direction assessed (HDHQ) scale. Binary logistic regression backward model selection used order identify key demographic, higher non-response HDHQ Results: vast majority participants (87.0%) had information Older age, lower educational level, poorer health status unhealthy dietary habits, found be significant high nonresponse rate, while female more likely have items Conclusions: augments prior evidence that is responders’ background characteristics, it gives rise research towards unrevealed paths behind this claim.