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Table 3 The levels of C-reactive protein (CRP) at the time of diagnosis, sensitivity, specificity, positive (PPV) and negative predictive values (NPV) of CRP for diagnosis of acute pyelonephritis in children (cut-off values of 2mg/dl)

From: Community-acquired methicillin-resistant Staphylococcus epidermidis pyelonephritis in a child: a case report

Reference number N Mean ± SD, mg/dl Sensitivity, % Specificity, % PPV, % NPV, %
Smolkin et al. 2002 [16] 42 12 100 18.5 30.9 100
Pecile et al. 2004 [17] 53 10.6 ±2.6 94.4 31.9 61.4 83.3
Nikfar et al. 2010 [18] 62 ND 80 65 79 67
Xu et al. 2014 [19] 21 6.82 ±3.94 85.71 48 50 80
  1. ND: not described.