TABLE 5.

Performance of blood culture versus performance of PCR stratified by infection category

Infection category (no. of samples)aBlood culture resultNo. of samples with the following PCR result:% Concordance (kappa statistic value)
PositiveNegative
Category 1, definite (127)+402674.8 (0.50)
655
Category 2, probable (94)+0094.7 (0)
589
Category 3, possible (42)+0095.2 (0)
240
Category 4, negative (4)+00100 (0)
04
Category 5, negative (39)+00100 (0)
039
  • a For category 1, P = 0.0004 by McNemar's test for agreement between blood culture and PCR stratified by infection category. McNemar's test could not be performed for categories 2 to 5 due to the absence of positive blood cultures.