We assessed the diagnostic value of serum albumin, BMI, GNRI, and CONUT by constructing the receiver operating characteristic (ROC) curve to distinguish between sarcopenia and non-sarcopenia in all participants, in men and women, in participants with BMI < 22 and BMI ≥ 22 and in diabetes duration < 5 and ≥ 5 years. Here, ALB is linked to diabetes mellitus.