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Table 4 Clinical variables: overall, and MRSA vs. non-MRSA

From: Skin and soft-tissue infections in suburban primary care: epidemiology of methicillin-resistant Staphylococcus aureus and observations on abscess management

  All isolates, No. (%) of observations MRSA, No. (%) Non-MRSA, No. (%) Unadjusted OR (95% CI) Adjusted OR (95% CI)*
Temperature, ≥37.8°C 30/511 (6) 7/112 (6) 23/399 (6) 1.09 (0.5-2.6) -
Erythema ≥10 cm 93/500 (19) 38/110 (35) 55/390 (14) 3.2 (2.0 - 5.2) 2.59 (1.5-4.4), P < 0.001
Location (N = 529) (N = 115) (N = 414)   
   Trunk† 180 (34) 54 (47) 126 (30) 2.01 (1.3-3.1) -
   Head and neck 70 (13) 12 (10) 58 (14) 0.97 (0.5-1.9) -
   Extremities 279 (53) 49 (43) 230 (56) 1 -
Diagnosis group (N = 529) (N = 115) (N = 414)   
   Abscess 185 (35) 66 (57) 119 (29) 3.33 (2.2-5.1) 3.19 (2.1-5.0), P < 0.001
   Cellulitis 183 (35) 27 (23) 156 (38) 1‡  
   Other SSTIs 161 (30) 22 (19) 139 (34)   
  1. Abbreviations: MRSA, methicillin-resistant Staphylococcus aureus; OR, odds ratio; CI, confidence interval; SSTIs,
  2. skin and soft-tissue infections.
  3. * Adjusted for erythema ≥10 cm and diagnosis group.
  4. †The trunk was defined as the body from and including the axillae to the upper one third of the thighs.
  5. ‡For modeling purposes, cellulitis and other SSTIs were grouped.