Cognitive Status Classification Among Older Adults: A Study from SHARE-HCAP.

Background: Cognitive impairment is a major health problem, so several studies worldwide have studied its aggravating and protective factors. However, few studies have looked into the prediction of better or worsening cognitive status based on the presence of the most relevant biopsychosocial factors. Thus, the aim of this study is to predict cognitive status classification, specifically into normal cognitive status, mild cognitive impairment, and severe cognitive impairment, based on the most studied risk and protective factors in the context of the Survey of Health, Ageing and Retirement in Europe and Harmonized Cognitive Assessment Protocol association (SHARE-HCAP) project. Methods: Participants were from five European countries, and measures included their cognitive status classification from SHARE-HCAP and several associated factors previously measured in the eighth wave of SHARE. Results: A multinomial logistic regression was performed, with normal cognition as the reference category. Most individuals were correctly classified. Conclusions: Frequent participation in social activities and good cognitive task performance were associated with a lower likelihood of mild cognitive impairment compared to normal cognitive status. In turn, higher scores in depression and social network were associated with an increased likelihood of being classified as MCI in contrast to normal cognition. Additionally, being a woman and having worse cognitive performance were predictors of severe cognitive impairment classification over normal cognition status. Depression also contributed to a higher likelihood of being classified as mild and severe cognitive impairment, in contrast to a normal cognitive status. These findings highlight the importance of preventive medical check-ups and interventions before the onset of the first cognitive decline symptoms.