TABLE 2.

Performance characteristics of rapid testing compared to culture and consensus

Gold standardRapid testSensitivity (%)Specificity (%)Predictive value (%)
PositiveNegative
CultureZstatFlu-II test88a927596
Directigen test75937493
ConsensusbZstatFlu-II test89968996
Directigen test79979193
Culture8610010095
  • a P < 0.0574 compared to the Directigen test.

  • b A specimen positive in culture or in both rapid tests is considered positive by consensus.