5 Strengths and limitations
There are some strengths in this study. First of all, we selected four
measures of sarcopenia, including ASM, LH, RH and WP, to explore the
association of sarcopenia and COVID-19 in this study. Additionally, to
eliminate the impact of BMI on the association of WP and COVID-19, we
used WP adjusted for BMI to analyze the relationship between WP and
COVID-19. However, the GWAS data used in this study all originated from
European ancestry, thus it exists a racial heterogeneity and cannot be
extrapolated to other races. Furthermore, because the GWAS data was not
available, we only adjusted for WP by BMI, but not by other factors,
such as age, resulting in limited interpretation of the results.