Table 3.

Results of PCR versus culture, serology, exposure, or clinical pertussis

PCRNo. of patients with:Total
Pertussis diagnosed by culture, serology, exposure, or clinical symptomsNonspecific cough; no laboratory data indicating pertussis
Positive62335658c
Negative3331,4511,784d
Total956a 1,486b 2,442
  • a Sensitivity, 65% (623 of 956).

  • b Specificity, 98% (1,451 of 1,486).

  • c Positive predictive value, 95% (623 of 658).

  • d Negative predictive value, 81% (1,451 of 1,784).