ALB and aortic stenosis: In a cohort of older patients with severe aortic stenosis, V. Arnold et al. [14] examined the prevalence of frailty as a continuous variable based on four markers including grip strength, gait speed, serum albumin, and activities of daily living, and reported that 67.5% and 6.1% were prefrail (1–2 frailty markers) and 6.1% were frail (3–4 frailty markers).