Antimicrobial surface coating in the emergency department as protective technology for infection control (ASEPTIC): a pilot randomized controlled trial

Table 3 Contamination after patient-use, before routine cleaning, at 24 h, 7 days, and 180 days

Variables	Contamination in CFU/cm², median (IQR)
Variables	Saline (n = 48)	NOMOBAC (n = 48)	Difference of Medians (95% CI)
Total aerobic bacteria
24 h	1.01 (0.56–2.43)	0.61 (0.30–1.42)	0.40 (0.01 to 1.01)
7 days†	1.50 (0.88–4.19)	1.15 (0.68–2.45)	0.35 (-0.64 to 1.28)
180 days‡	1.84 (1.05–3.45)	2.06 (1.23–4.85)	-0.22 (-1.19 to 0.78)
Gram-positive halophilic bacteria
24 h	0.46 (0.17–0.91)	0.30 (0.11–0.70)	0.17 (-0.06 to 0.43)
7 days†	0.90 (0.28–1.99)	0.67 (0.31–1.13)	0.23 (-0.18 to 0.79)
180 days‡	1.10 (0.58–2.40)	0.96 (0.48–2.59)	0.14 (-0.75 to 0.71)
Gram-negative bacteria
24 h	0.57 (0.19–1.02)	0.24 (0.15–0.75)	0.33 (0.09 to 0.45)
7 days†	0.00 (0.00-0.39)	0.00 (0.00-0.05)	0.00 (-0.01 to 0.02)
180 days‡	0.98 (0.59–2.63)	1.01 (0.60–2.97)	-0.02 (-1.06 to 0.48)
MRSA
24 h	0.00 (0.00–0.00)	0.00 (0.00–0.00)	0.00 (0.00 to 0.00)
7 days†	0.00 (0.00-0.01)	0.00 (0.00–0.00)	0.00 (0.00 to 0.01)
180 days‡	0.02 (0.00-0.02)	0.00 (0.00-0.02)	0.01 (-0.00 to 0.02)

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