Subgroup analysis of excess hospital stay and costs.

Abbreviations: HAI, healthcare-associated infection; SD, standard deviation; MSSA, methicillin-susceptible S. aureus; MRSA, methicillin- resistant S. aureus.*Any of the 7 classes of severe illnesses (cancer, dialysis-dependent end stage renal disease, liver cirrhosis with complications, chronic ventilator dependence, generalized autoimmune syndrome, spinal injury/myeleterosis, and major trauma).‡At an exchange rate of 30 New Taiwan Dollars (NT$s)/US$.†Statistically significant, after Bonferroni correction (P