The Korean Journal of Healthcare-Associated Infection Control and Prevention

Table 2

Comparison of methicillin-resistant Staphylococcus aureus colonization and infection by stage (N=346)

Variables	Total	ASC (n=125)	ASC, Isolation (n=126)	ASC, Isolation, 2% CHG bathing (n=95)	χ²	P
Variables	N (%), Mean±SD (median, range)				χ²	P
Number of patients	346	125	126	95
Patient days	2,646	1,075	899	672
MRSA colonization	16 (4.6)	8 (6.4)	5 (4.0)	3 (3.2)	1.480	.477
MRSA colonization incidence rate^†	4.6	6.4	4.0	3.2
MRSA colonization incidence density rate^‡	6.04	7.44	5.56	4.46
Days of MRSA colonization (n=16)	16.50±25.00 (9.00, 3.00-108.00)	21.38±35.30 (8.50, 3.00-108.00)	9.40±5.32 (8.00, 3.00-17.00)	15.33±6.66 (17.00, 8.00-21.00)	1.851	.396
MRSA infection	1 (0.3)	0 (0.0)	1 (0.8)	0 (0.0)	1.671	1.000*
Days of MRSA infection (n=1)	10	0	10	0	N/A	N/A

*Fisher’s exact test; ^†MRSA colonization incidence rate=Patient with MRSA colonizationNumber of patients×100; ^‡MRSA colonization incidence density rate= Patient with MRSA colonizationPatient days×1000

Abbreviations: ASC, active surveillance culture; CHG, chlorhexidine gluconate; MRSA, methicillin-resistant Staphylococcus aureus; N/A, not available; SD, standard deviation

Korean J healthc assoc Infect Control Prev 2022;27:35~42 https://doi.org/10.14192/kjicp.2022.27.1.35