Table 1. Comparison of nasal Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) colonization rate between adult patients with and without risk factors.

Colonized subjects	No. (%) of subjects			Odds Ratio [95% confidence interval]	p value
	With risk factor	Without risk factor	Total
Subject No.	219	283	502
S. aureus	47(21.4)	40(14.1)	87 (17.3)	1.667(1.047–2.653)	0.033
MRSA	13 (5.9)	6 (2.1)	19 (3.8)	2.924(1.093–7.822)	0.033