Table 2.
Characteristics of Cases and Controls
| Group; No. (%)* | |||
|---|---|---|---|
|
| |||
| Characteristic | Cases (ESBL-EK) (n = 40) | Controls (non-ESBL-EK) (n = 40) | p Value |
| Age, years, mean ± SD | 61.6 ± 15.7 | 63.9 ± 19.5 | 0.56 |
| Sex, female | 13 (32) | 18 (45) | 0.25 |
| Charlson score, median (range) | 2 (0–11) | 2 (0–12) | 0.87 |
| Infecting organism: Escherichia coli | 37 (92) | 37 (92) | > 0.99 |
| Location of acquisition | |||
| Community onset | 16 (40) | 20 (50) | 0.10 |
| Health care–associated | 10 (25) | 9 (22) | 0.70 |
| Hospital-acquired | 14 (35) | 11 (28) | 0.29 |
| Hospital location at time of infection | |||
| Medical ward | 9 (64) | 10 (91) | 0.43 |
| Surgical ward | 4 (29) | 1 (9) | 0.36 |
| ICU | 1 (7) | 0 (0) | > 0.99 |
| Known or suspected origin of infection | |||
| Urinary tract | 22 (55) | 20 (50) | 0.82 |
| Other | 3 (8) | 5 (12) | 0.71 |
| Unknown | 15 (38) | 15 (38) | > 0.99 |
ESBL-EK = Escherichia coli and Klebsiella species producing extended-spectrum ß-lactamase, non-ESBL-EK = Escherichia coli and Klebsiella species not producing extended-spectrum ß-lactamase, ICU = intensive care unit, SD = standard deviation.
*
Except where indicated otherwise