Fig. 1From: Lack of association between circulating apelin level and frailty-related functional parameters in older adults: a cross-sectional studyDifferences in serum apelin levels according to the phenotypic frailty status (a) before and (b) after adjustment for sex, age, and BMI. The estimated means with 95% confidence intervals were generated and compared using analysis of covariance. BMI, body mass indexBack to article page