title: Development of the motivation to change lifestyle and health behaviours for dementia risk reduction scale.
abstract: OBJECTIVE
  It is not yet understood how attitudes concerning dementia risk may affect motivation to change health behaviours and lifestyle. This study was designed to develop a reliable and valid theory-based measure to understand beliefs underpinning the lifestyle and health behavioural changes needed for dementia risk reduction.
  
  
  METHODS
  617 participants aged ≥50 years completed a theory-based questionnaire, namely, the Motivation to Change Lifestyle and Health Behaviours for Dementia Risk Reduction (MCLHB-DRR) scale. The MCLHB-DRR consists of 53 items, reflecting seven subscales of the Health Belief Model.
  
  
  RESULTS
  Confirmatory factor analysis was performed and revealed that a seven-factor solution with 27 items fitted the data (comparative fit index = 0.920, root-mean-square error of approximation = 0.047) better than the original 53 items. Internal reliability (α = 0.608-0.864) and test-retest reliability (α = 0.552-0.776) were moderate to high. Measurement of invariance across gender and age was also demonstrated.
  
  
  CONCLUSIONS
  These results propose that the MCLHB-DRR is a useful tool in assessing the beliefs and attitudes of males and females aged ≥50 years towards dementia risk reduction. This measure can be used in the development and evaluation of interventions aimed at dementia prevention.
authors.affiliation: Centre for Research on Ageing, Health and Well-Being, Australian National University, Canberra, A.C.T., Australia.
authors.forename: Sarang
authors.initials: S
authors.lastname: Kim
authors.affiliation: Centre for Research on Ageing, Health and Well-Being, Australian National University, Canberra, A.C.T., Australia.
authors.forename: Kerry
authors.initials: K
authors.lastname: Sargent-Cox
authors.affiliation: Centre for Research on Ageing, Health and Well-Being, Australian National University, Canberra, A.C.T., Australia.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Cherbuin
authors.affiliation: Centre for Research on Ageing, Health and Well-Being, Australian National University, Canberra, A.C.T., Australia.
authors.forename: Kaarin J
authors.initials: KJ
authors.lastname: Anstey
keywords: Behaviour change; Dementia risk reduction; Lifestyle change; Scale development