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. 2017 Dec 21;62(1):e01631-17. doi: 10.1128/AAC.01631-17

TABLE 1.

Demographic and clinical characteristics of the study population based on colonization status with MDR Acinetobacter baumannii at ICU admission

Characteristic No. of patients (%) unless specified otherwisea
P value
Positive for MDR AB strains (n = 320) Negativeb for MDR AB strains (n = 7,605)
Age of 65 yrs or older 100 (31.3) 2,205 (29.0) 0.38
Female sex 136 (42.5) 3,447 (45.3) 0.32
ICU type <0.01
    MICU 261 (81.6) 4,557 (59.9)
    SICU 59 (18.4) 3,048 (40.1)
Length of stay in hospital before ICU admission of 2 or more days 47 (14.7) 1,868 (24.6) <0.01
Previously admitted 1 or more times 150 (46.9) 2,791 (36.7) <0.01
Antibiotic use in hospital prior to ICU admission 161 (50.3) 3,338 (43.9) 0.02
Surgery 40 (12.5) 867 (11.4) 0.54
Total Elixhauser comorbidity index [median (range)] 4.00 (9.0) 4.00 (11.0) 0.57
a

MDR AB, multidrug-resistant Acinetobacter baumannii.

b

This group includes patients colonized with susceptible (non-MDR) Acinetobacter baumannii strains.