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Table 3 Test characteristics for three methods of determining effectiveness of post-discharge cleaning as tested against a microbiologic comparator

From: Effectiveness of visual inspection compared with non-microbiologic methods to determine the thoroughness of post-discharge cleaning

  

Test characteristics to determine clean (95% CI)

Test

TDC score

Sensitivity

Specificity

Positive predictive value

Negative predictive value

ACC ≤ 5 CFU

72.1%

—

—

—

—

Fluorescent marker

49.3%

51.2% (44.2-58.2)

55.6% (44.1-66.6)

74.8%

30.6%

Visual inspection

56.9%

60.3% (53.3-67.0)

51.9% (40.5-63.1)

76.4%

33.6%

ATP (RLU > 250)

66.2%

70.3% (63.6-76.4)

44.4% (33.4-55.9)

76.6%

36.7%

  1. Note. CI, confidence interval; ACC, aerobic colony count; CFU, colony-forming units; TDC, thoroughness of disinfection cleaning; ATP, adenosine triphosphate; RLU, relative light units.