I read with great interest the paper by Moreno-González et al. [1], who investigated the association between sarcopenia and kidney function in older adults, aged ≥75 years. Estimated glomerular filtration rate (eGFR) was calculated using creatinine and non-creatinine-based equations. The adjusted odds ratio (OR) (95 % confidence interval [CI]) of age, body mass index (BMI), disability performing instrumental activities of daily living (IADL), Mini Mental State Examination (MMSE) score
