Crude OR for frailty in stroke patients = 3.82 (1.7–8.58). Adjusted OR = 4.5 (1.35–14.97), p = 0.014.Adj: age, sex, education, anorexia, osteoarthritis, dyspepsia, number of medications, anemia, CRP, muscle mass, and creatinine. The gene discussed is CRP; the disease is anemia.