ABSTRACT. Objective: the current study aimed to examine homocysteine in relation to different aspects of physical functioning. Design, setting and participants: cross-sectional and longitudinal data (3-years follow-up)from the Longitudinal Aging Study Amsterdam (LASA) were used. the study was performed in persons aged ≥ 65 years (N= 1301 after imputation). Measurements: different measures of physical functioning, including muscle mass, grip strength, functional limitations, and falling were regarded as outcomes. Gender and serum creatinine level were investigated as effect modifiers. Results: results were stratified by gender. in men, higher homocysteine levels were associated with lower grip strength (Quartile 4: regression coefficient (B)= -3.07 (-4.91; -1.22)), and more functional limitations at baseline (Quartile 4: B= 1.15 (0.16-2.14)). in women, higher homocysteine levels were associated with more functional limitations after 3 years (Quartile 4: B= 1.19 (0.25; 2.13)). higher homocysteine levels were not associated with low muscle mass or falling. Conclusions: these data suggest an inverse association of homocysteine levels with functional limitations in older men and women, and with muscle strength in older men.
