CRP and bacterial urinary tract infection: The serum PCT and CRP levels of the APN group were significantly higher than those of the lower UTI group (3.90 ± 3.51 ng/ml and 68.17 ± 39.42 mg/l vs. 0.48 ± 0.39 ng/ml and 21.39 ± 14.92 mg/l, P < 0.01, Table 1).