Prevalence of probable sarcopenia in community-dwelling older Swiss people - a cross-sectional study

BackgroundThe European Working Group on Sarcopenia in Older People has recently defined new criteria for identifying "(probable) sarcopenia" (EWGSOP2). However, the prevalence of probable sarcopenia, defined by these guidelines, has not been determined extensively, especially in the oldest old. This study aims to determine the prevalence of probable sarcopenia in older, community-living people and its association with strength-related determinants.MethodsHandgrip strength and reported determinants (age, height, weight, osteoarthritis of hands, medications, fall history, physical activity, activities of daily living (ADL) and global cognitive function) were collected in a cross-sectional study of 219 community-living Swiss people (75years and over). Probable sarcopenia was estimated based on cut-off values for handgrip strength as recommended by EWGSOP2. Spearman correlations, binary-regression analyses and contingency tables were used to explore relationships between variables.ResultsThe prevalence of probable sarcopenia in women (n=137, age 84.15.7years) and men (n=82, age 82.6 +/- 5.2years) was 26.3 and 28.0%, respectively. In women, probable sarcopenia correlated positively with age and falls (r(s) range 0.332-0.195, p<.05), and negatively with weight, cognition, physical activity, using stairs regularly, participating in sports activities and ADL performance (r(s) range=-0.141 - -0.409, p<.05). The only significant predictor of probable sarcopenia at the multivariate level was ADL performance (Wald(1)=5.51, p=.019). In men, probable sarcopenia was positively correlated with age (r(s)=0.33, p<.05) and negatively with physical activity, participation in sports and ADL performance (r(s) range-0.221 - -0.353, p<.05). ADL performance and age (Wald(1)=4.46, p=.035 and Wald(1)=6.30, p=.012) were the only significant predictors at the multivariate level. Men and women with probable sarcopenia were 2.8 times more likely to be dependent in ADL than those without.Conclusion Probable sarcopenia affected one in every four community-living, oldest old people and was independently associated with impaired ADL performance in both sexes. This highlights the importance of detection of handgrip strength in this age group in clinical practice. Although prospective studies are required, independence in ADL might help to protect against probable sarcopenia.