Table 1

Risk factors for MRSA

Variable
Hypothesized relationship to MRSA
Found to be Predictive

Age
Youth increases likelihood of engaging in other risky behaviors, i.e. drug use, sports, promiscuous sex
Yes
Race
Unknown, previously described in Frazee1
No
BMI
Elevated BMI suspected to impair ability to enact good hygiene
No
Homelessness
Suspected to impair ability to enact good hygiene
No
Group home
Increases skin to skin contact, communal living
Yes
Nursing home
Exposes one to hospital acquired pathogens
No
Incarceration, or contact with incarcerated person
Increases skin to skin contact, poor hygiene, transmission to family and friends
Yes
IV drug use
Inoculates bacteria directly into skin
No
Sexual contact
Increases skin to skin contact
Yes
Occupation in healthcare
Exposes to hospital acquired pathogens
No
Recent skin infection
Points to colonization with MRSA
No
Lesion characteristics (abscess/cellulitis)
MRSA tends to form abscesses or furuncles, rather than cellulitis3
Yes
Lesion location
Lesions in pelvic area lower risk given suspected higher incidence of fecal flora
No
Number of lesions
Increased number of lesions suspected to correlate with MRSA due to increased invasiveness of MRSA
No
Spontaneous vs. pre-existing wound
Spontaneous infections higher risk based on increased invasiveness of MRSA
No

Jacobus et al. BMC Emergency Medicine 2007 7:19   doi:10.1186/1471-227X-7-19