Background and purpose: Motoric cognitive risk (MCR) syndrome characterized by subjective cognitive complaints and slow gait has been proposed and validated as a pre-dementia syndrome. The overall and specific ethnic prevalence of MCR and the associated factors are poorly understood in middle-aged to older community-dwelling residents in west China.
Methods:The present study included 6091 samples from the prospective cohort study, West China Health and Aging Trend (WCHAT). Multidimensional factors of demography, lifestyle, social support, anthropometrics and body components, and clinical status were investigated and analyzed by univariate and multivariate logistic regression models. Lasso regression and K-fold cross-validation were conducted to construct the most predictive model with fitted factors.
Results:The overall prevalence of MCR was 9.74%, and ethnically the prevalence was 14.25% in Tibetan, 11.03% in Yi, 10.72% in Han, 5.18% in Uighur and 4.55% in Qiang, respectively. In the adjusted models, the positively associated risk factors included diabetes mellitus (odds ratio [OR] = 1.51, p = 0.007), osteoarthritis (OR = 1.50, p = 0.002), depression (OR = 1.36, p = 0.005), poor sleep (OR = 1.21, p = 0.045), comorbidity (OR = 1.49, p = 0.001) and falls in the last 12 months (OR = 1.34, p = 0.031). Of note, every 1-unit increase of value in stroke was associated with an approximate 3-fold higher risk of having MCR, whilst in high-density lipoprotein with a 30% lower risk of MCR,respectively.Conclusions: Profiles of MCR from the aspects of ethnicity and the presenium stage need further exploration. It is a promising strategy to apply MCR as a primary prevention tool to prevent dementia. | 1355 MOTORIC COGNITIVE RISK SYNDROME IN MULTIPLE ETHNICS INTRODUC TI ON An estimated 55 million people are currently living with dementia globally [1], with forecasts reaching 78 million by 2030 and 152 million by 2050, 60%-80% of which can be attributed to Alzheimer's disease (AD) [1-3]. The Alzheimer's Disease International estimated that 75% of individuals with dementia are not diagnosed and 90% of them are in undeveloped and underdeveloped regions and countries [1]. Dementia is a disease with multifactorial etiology and heterogeneous clinical presentation and disease trajectory. Also, dementia has a long preclinical phase from several years to decades before the cognitive alterations indicating mild cognitive impairment (MCI) are detectable [3,4]. Motoric cognitive risk (MCR) syndrome was proposed and validated in 2013 by Verghese and colleagues to identify aging individuals at high risk for dementia during the pre-dementia stage [5,6]. Approximately 10% of older persons are affected by MCR worldwide [7]. This syndrome integrates two specific harbingers of dementia, subjective cognitive complaints (SCC) and slow gait speed (SG), in the absence of mobility disability and dementia [5,6]. MCR was found to be more strongly associated with cognitive decline or dementia than either of these two harbingers alone [3,8]. Cognitive fun...