About a third of cognitively well, community-living older Canadians are at nutrition risk, which has been shown to lead to hospitalizations, poor quality of life, and death. Since SCREEN was created 20 years ago, there has been considerable growth in the number of community-living older adults diagnosed with mild cognitive impairment or dementia (i.e., MCI-D) and/or living in retirement homes. These two groups are nutritionally vulnerable. Nutrition risk is specifically associated with the progression of cognitive impairment and frailty, as well as caregiver burden. Yet, these groups are under-served with respect to nutrition care; dietitian services are not available in retirement homes and limited in many primary or memory care clinics. Nutrition screening and subsequent management of identified nutrition problems by accessing diverse community services (e.g., meal programs) in Canadian older adults is recommended because it can promote independence and delay frailty. However, preventative management for those with MCI-D or living in retirement homes is limited by lack of systematic nutrition screening with a valid and reliable tool that is feasible for these vulnerable seniors.

SCREEN is the leading nutrition risk tool for community-living seniors and is the logical choice for use in those with MCI-D and/or living in retirement residences. However, it has not been validated in these groups. It cannot be assumed that the existing validation in cognitively well older adults living in their own homes can translate to these two vulnerable groups. As well, one question on grocery shopping needs to be changed to accommodate persons living in retirement homes. This study is also timely with the recent update of Canada's Food Guide and recommendations to increase protein intake to mitigate frailty. Two questions on SCREEN need to be modified to adapt the new language on protein foods used in the new Food Guide. This study will undertake the validation and reliability testing of SCREEN, considering these minor revisions, in 600 older adults (community-dwelling older adults with MCI-D and those living in retirement homes with or without MCI-D). Validation of SCREEN for these populations will ensure that a single tool can be used in all older adults living in community and retirement settings. Specifically, understanding at what point a person with MCI-D is no longer a reliable informant for completing SCREEN will help with identification when a caregiver should complete the questionnaire. This is why the Montreal Cognitive Assessment is used, as it provides discrete scores differentiating mild cognitive impairment from dementia. The results of this study will have significant impact on practice by allowing, for the first time, confidence in the identification of nutrition risk in these under-served groups in Canada. There is an urgent need for this research. Early identification of nutrition risk and its subsequent management has the potential to advance our health care system by promoting the prevention of frailty and its consequences. This study will have a meaningful impact in the 'real world' setting of primary and community care for older adults in Canada and worldwide, by providing a feasible, validated and useful nutrition risk tool.