Fig. 4From: A prospective study of the association between serum klotho and mortality among adults with rheumatoid arthritis in the USAThe KM survival curve of the study populations based on the subgroups. A male; B age ≥ 60 years old; C White; D BMI < 25 kg/m2; E eGFR ≥ 60 mL/(min × 1.73 m2); F 25-hydroxyvitamin D ≥ 50 nmol/LBack to article page