TABLE 3

Positivity rates of all bottle types combined according to volume compliance status and clinical significance of bottles with positive resultsa

Volume compliance statusTotal no. of bottle pairsNo. (%) of bottles
All positivesClinically significant positivesContaminatedIndeterminate
Compliant3,539257 (7.3)203 (5.7)49 (1.4)5 (0.1)
Noncompliant, ≤10 ml1,16586 (7.4)64 (5.5)22 (1.9)0
Noncompliant, >10 ml1,00587 (8.7)75 (7.5)b12 (1.2)0
All5,709430 (7.5)342 (6.0)83 (1.5)5 (0.1)
  • a Positive culture data imply that at least one bottle from the bottle pair gave a positive signal and had a positive subculture.

  • b Data were statistically significant compared to rate determined for volume-compliant bottle sets by Pearson's chi-square test (P = 0.044).