TABLE 1.
Variables in patients who contracted the outbreak strain versus patients who contracted nonepidemic strains (univariate analysis)
| Risk factor for acquisitiona | Result for patients with:
|
RRb (95% CI) | |
|---|---|---|---|
| Nonepidemic VREF (n = 11) | Epidemic VREF (n = 19) | ||
| Mean age (yr) (range) | 61.8 (18.0-86.1) | 59.7 (37.7-80.5) | |
| Sex (male/female) | 8/3 | 11/8 | |
| Hospitalization in nephrology ward | 7 (63.6) | 11 (57.9) | |
| Diabetes mellitus | 0 (0) | 6 (31.6)c | 1.7 (1.1-2.6) |
| Hemodialysis | 6 (54.5) | 8 (42.1) | |
| Kidney transplant | 0 (0) | 4 (21.1)d | 1.6 (1.0-2.5) |
| Autologic bone marrow transplant | 2 (18.2) | 0 (0) | |
| Mean length of stay (days) (range) | 20 (0-94) | 40 (0-209) | |
| No antibiotics | 1 (9.1) | 0 (0) | |
| 1 Antibiotic | 6 (54.5) | 4 (21.1) | |
| 2-3 Antibiotics | 2 (18.2) | 13 (68.4)e | 9.7 (1.6-59.7) |
| ≥4 Antibiotics | 2 (18.2) | 2 (10.5) | |
a
Unless otherwise indicated, all data are numbers of patients, with percentages of the total number of patients indicated in parentheses.
b
RR, relative risk.
c
P = 0.037.
d
P = 0.102.
e
P = 0.008.