Table 1.

Distribution of ATP-bioluminescence values (RLU) in the different RODAC categories (CFU/plate)

ATP-bioluminescence assay	RODAC categories
	No growth	Expected value TVC ≤ 5 CFU/plate	Acceptable value TVC: 6–15 CFU/plate	Not acceptable TVC > 15 CFU/plate
	N: 74	N: 57	N: 6	N: 3
Geometric mean (CI 95%) RLU/100 cm2	29.2 (23.6–36.1)	34.7 (25.6–46.9)	51.7 (13.9–191.5)	74.8 (na)
Median (Range) RLU/100 cm2	29 (4–480)	30.5 (4–510)	48 (10–480)	63 (27–233)
Number of samples with discordant results (cut off: 100 RLU/100 cm2)	7 (9.5%)	10 (17.5%)	1 (16.7%)	2 (66.6%)

CI, Confidence Interval

na: not applicable