TABLE 3.

Patient characteristics and comparison of clinical and epidemiological variables between patients and controls

CharacteristicValueP
Overall (n = 601)Patients (n = 298)Controls (n = 303)
Mean age ± SD (yr)59.8 ± 17.362.7 ± 16.856.8 ± 17.3<0.001
Sex (% male)63.964.863.00.646
Department (%)0.069
    Medical43.446.340.6
    Surgical22.123.1121.1
    Intensive care unit18.017.618.5
    Hematology-oncology11.110.411.9
    Other5.12.67.9
McCabe-Jackson scale (%)0.983
    Type I7.47.57.3
    Type II39.539.739.3
    Type III53.152.853.5
Underlying illness (%)
    Cardiopathy24.927.722.10.113
    Broncopathy24.426.722.10.189
    Ulcer17.519.215.80.288
    Diabetes20.526.714.2<0.001
    Neoplasia18.019.916.20.248
Charlson's comorbidity score (mean ± SD)3.5 ± 2.43.7 ± 2.43.2 ± 2.30.016
Other characteristics and treatments (%)
    Hypoproteinemia34.634.235.00.865
    Intravenous drug abuse2.83.91.70.138
    Neutropenia5.44.95.90.595
    Splenectomy1.82.01.71.000
    Radiotherapy2.32.02.060.601
    Chemotherapy15.213.417.20.216
    Corticosteroids18.518.618.51.000
    Prior surgery27.423.831.00.046
    Invasive procedures47.445.349.90.331
    Prosthetic material20.023.116.80.055
    Intravenous line69.362.975.9<0.001
    Bladder catheter32.531.633.30.666
    Skin lesions7.011.13.0<0.001
    Prior antimicrobials44.130.957.4<0.001
APACHE II score (mean ± SD)11.5 ± 5.712.6 ± 5.610.3 ± 5.7<0.001