CRP and crystal arthropathy: For example, serum urate demonstrated a Student’s t test p value of 0.11 (gout, mean 6.4 ± 1.9 mg/dL, CPP crystal arthritis, mean 5.3 ± 1.7 mg/dL), while CRP had a Mann-Whitney U test p value of 0.09 (median [IQR]; gout 10.9 mg/l [1.7–41]; CPPD 23.4 mg/l [10.7–119.6]).