Table 4.

Multivariate Linear Regression Analysis of Factors Associated with Nursing Home MRSA Point Prevalence and MRSA Transmission Risk

Outcome: Facility MRSA Point Prevalence
Variable	Absolute Change in MRSA Point Prevalence per absolute increase of 10% in variable(95% CI)	p-value
High MRSA Admission Prevalencea	13.0 (4.3, 21.7)	0.005
% Residents with Indwelling Deviceb	1.8 (0.1,3.5)	0.04
Outcome: Facility MRSA Transmission
Variable	Absolute Change in MRSA Transmission per absolute increase of 10% in variable(95% CI)	p-value
% Residents with High Social Engagementc	−2.0 (−3.8,-0.2)	0.03
% Residents with Diabetesd	3.6 (1.1,6.0)	0.01

^a MRSA admission prevalence was dichotomized at the median value (15%).

^b The presence of an indwelling device was collinear with the proportion of residents with fecal incontinence.

^c High social engagement score was defined as greater than or equal to 3 out of 6.

^d In the transmission model, the percentage of residents with diabetes was collinear with the percent of residents with less than a high school education.