TABLE 3

Demographic and clinical characteristics of patients with methicillin-resistant Staphylococcus aureus and methicillin-susceptible S. aureus infections at the University of Chicago Medical Center, 1994 to 1997

CharacteristicNo. (%) of patients with:P
MRSA (n = 30)MSSA (n = 75)
Clinical syndrome0.5
    Bacteremia, endocarditis, or sepsis8 (27)14 (19)
    Osteomyelitis or septic arthritis04 (5)
    Respiratory3 (10)2 (3)
    Skin and soft tissue infection16 (53)36 (48)
    Urinary tract infection01 (1)
    Colonization3 (10)14 (19)
    Othera02 (3)
Age group (yr)0.2
    <19 (30)26 (35)
    1–27 (23)8 (11)
    3–52 (7)13 (17)
    6–129 (30)15 (20)
    13–183 (10)13 (17)
Gender0.3
    Male14 (47)43 (57)
    Female16 (53)32 (43)
Race0.1
    African-American23 (77)42 (56)
    White3 (10)15 (20)
    Unknown or other4 (13)18 (24)
Type of insurance0.5
    Public assistance23 (77)49 (65)
    Private6 (20)24 (32)
    Uninsured1 (3)2 (3)
Presence of risk factors for HA-MRSA
    Inpatient culture obtained >48 h after admission13 (46)31 (41)0.6
    Hospital stay, past yr8 (27)29 (39)0.2
    Surgery, past yr5 (17)26 (35)0.07
    Hemodialysis, past yr00NAc
    Indwelling catheter9 (30)30 (40)0.9
    Stay in long-term-care facility, past yr03 (4)0.6
Location of careb0.1
    Intensive care units9 (30)32 (43)
    Other inpatient units13 (43)26 (35)
    Emergency department4 (13)6 (8)
    Outpatient2 (7)11 (15)
    Unknown2 (7)0
CDC criteria for infection type0.2
    CA12 (40)21 (28)
    HO13 (45)31 (41)
    HACO4 (14)23 (31)
Previous MRSA isolation, UCMC laboratory report5 (17)2 (3)0.02
  • a Other clinical syndromes include sinusitis and liver abscess.

  • b The location of care was unknown for 2 subjects.

  • c NA, not applicable.