Table 4. Multilevel logistic regression analysis of individual risk factors of MRSA carriage in residents of 60 NHs in Belgium in 2011.

Predictors of MRSA carriage (n = 2600)		Adjusted OR (95%CI)	P-value
Previous MRSA carriage	No	1.0 (Reference)
	Yes	3.5 (2.2–5.6)	<0.001
Pressure sores	No	1.0 (Reference)
	Yes	1.7 (1.1–2.6)	0.013
Antacid use	No	1.0 (Reference)
	Yes	1.5 (1.2–2.0)	0.001
Katz scale category (level of autonomy)			<0.001
	O	1.0 (Reference)
	A	1.8 (1.1–2.9)
	B	1.5 (0.9–2.3)
	C	2.2 (1.3–3.7)
	CD	2.3 (1.5–3.6)