Table 5 Comparison of calprotectin concentrations in urine in different subgroups.

From: Urinary calprotectin as a diagnostic tool for detecting significant bacteriuria

Subgroups

Calprotectin concentration ng/ml

p-value*

Pyuria 25/µl (median, IQR)

1684.2 (641.0–2681.9)

 < 0.001

Pyuria 500/µl (median, IQR)

7074.8 (2192.5–19,114.9)

CFU/ml 106 (median, IQR)

3318.5 (1962.1–6000.2)

–

CFU/ml 104 (median, IQR)

1862.1 (600.9–4550.5)

–

CFU/ml 105 (median, IQR)

4614.4 (1183.8–8634.9)

0.007

CFU/ml 103 (median, IQR)

787.8 (110.6–2061.4)

CFU/ml < 105 without pyuria (median, IQR)

95.6 (32.6–476.4)

0.029

CFU/ml ≥ 105 without pyuria (median, IQR)

544.7 (74.9–2152.7)

CFU/ml < 105 with pyuria (median, IQR)

1900.2 (787.8–5661.5)

0.009

CFU/ml ≥ 105 with pyuria (median, IQR)

5510.4 (242.4–6260.4)

CFU/ml ≥ 105 with contamination (median, IQR)

5010.3 (4800.4–15,996.8)

0.492

UTI (median, IQR)

3811.9 (1949.5–6847.9)

  1. UTI urinary tract infection, CFU colony forming units, IQR interquartile range;
  2. *p-value between concentrations of calprotectin in urine in the subgroups from Mann–Whitney-U-Test.
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