Figure 3.

Box and whisker plots showing serum cystatin C concentrations in a group of initially nonazotemic (serum creatinine concentration <2.0 mg/dL) hyperthyroid cats (n = 55), healthy nonazotemic older cats (n = 24, serum creatinine concentration <1.7 mg/dL) and nonhyperthyroid cats diagnosed with azotemic CKD (n = 12). Whiskers represent the 5th and 95th percentiles and circles represent outliers. Serum cystatin C concentrations were significantly higher in hyperthyroid cats than healthy nonazotemic older cats (P = .001). Serum cystatin C concentrations were not significantly different between the healthy older cat and nonhyperthyroid azotemic CKD groups (P = .16).