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Table 5 Comparison of serum procalcitonin level (at different cut-offs) between non-severe pneumonia (n = 211) and severe pneumonia (n = 101) (as per WHO criteria)

From: Role of procalcitonin in diagnosis of community acquired pneumonia in Children

  Pneumonia (non-severe) Severe pneumonia p
PCT level > 0.25 ng/ml
  + ve 60 (28.4) 38 (37.6) 0.1
 -ve 151 (71.6) 63 (62.4)  
PCT level > 0.5 ng/mL
  + ve, n = 73 42 (19.9) 31 (30.7) 0.03
 -ve, n = 239 169 (80.1) 70 (69.3)
PCT level > 1 ng/ml
  + ve 30 (14.2) 24 (23.8) 0.03
 -ve 181 (85.8) 77 (76.2)
PCT level > 2 ng/ml
  + ve 21 (9.9) 19 (18.8) 0.02
 -ve 190 (90.1) 82 (81.2)
PCT level > 3 ng/ml
  + ve 18 (8.5) 17 (16.8) 0.03
 -ve 193 (91.5) 84 (83.2)
  1. Values are in n (%): PCT procalcitonin
  2. The data should be for 312