Summary of studies in the meta-analyses, grouped by the type of denominator in the rate.

*Summarized data used to create published figures was received from the corresponding authors of these studies. Notes: CDC stands for Centers for Disease Control and Prevention; I/P stands for inpatient; O/P stands for outpatient; ED stands for emergency department; CA-, stands for community-associated; MDR stands for multidrug resistant; MRSA stands for methicillin-resistant Staphylococcus aureus; Ped. stands for pediatric; Pop. stands for population; and SSTIs stands for skin and soft tissue infections. CDC, 24-hour, 48-hour, and 3-calendar-day criterion refer to different criteria defining CA-MRSA infections. The last 3 categorized infections as being CA-MRSA if they were cultured in an outpatient or cultured from a patient within the stated period after admission to a hospital.