Rating the quality of life of people with dementia living in residential care facilities in routine research practice.

Dr Smith contributed to the design, data analysis and interpretation, provided a careful review for intellectual content and gave approval of the final manuscript. Dr Munger was principal investigator of the ‘Cache County family-based Cohort Study on Aging’, the companion study that collected initial screening test scores and parental death data, and he provided a careful review of this manuscript for intellectual content and gave approval of the final manuscript. Dr Tschanz contributed to the design, data analysis and interpretation, provided a careful review for intellectual content and gave approval of the final manuscript. Each of the authors, Drs Norton, Østbye, Smith, Munger and Tschanz, has no financial or personal conflicts of interest.