RESULTS Before the protocol, 132 patients acquired MRSA in 34 333 patient days (rate ratio, 3.84). Afterwards,
109 patients acquired MRSA in 41 376 patient days (rate ratio, 2.63). The rate ratio difference is
1.46 (95% CI, 1.12-1.90; P = .003). The chlorhexidine soap and bath basin method cost $3.18 as compared
with $5.52 for chlorhexidine-impregnated wipes (74% higher).