Table 2. Univariate and multivariate analyses of risk factors for 30-day mortality.
| Variables | Death (N=13) | Survival (N=23) | P | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|---|---|
| OR (95% CI) | P | OR (95% CI) | P | ||||
| Age (yr) | 66.0 (4.0–71.0) | 67.0 (50.5–71.5) | 0.419 | 1.02 (0.99–1.05) | 0.142 | ||
| Male sex* | 5 (38.5%) | 10 (43.5%) | 0.999 | 1.23 (0.31–5.17) | 0.770 | ||
| Infection type* | 0.005 | ||||||
| Bloodstream infection | 6 (46.2%) | 1 (4.3%) | 0.05 (0–0.38) | 0.012 | 0.02 (0–0.22) | 0.011 | |
| Respiratory infection | 7 (53.8%) | 18 (78.3%) | 3.09 (0.72–14.23) | 0.134 | |||
| Other | 0 (0.0%) | 4 (17.4%) | |||||
| Ventilator care* | 13 (100.0%) | 15 (65.2%) | 0.046 | NA | 0.994 | ||
| History of colistin treatment* | 7 (53.8%) | 11 (47.8%) | 0.999 | 1.27 (0.32–5.12) | 0.729 | ||
| Treatment duration (day) | 21.7 ± 18.5 | 17.2 ± 8.9 | 0.562 | 0.97 (0.89–1.05) | 0.471 | ||
| APACHE II | 14.6 ± 4.3 | 11.4 ± 3.7 | 0.025 | 0.81 (0.65–0.97) | 0.035 | 0.73 (0.53–0.92) | 0.019 |
| ICU admission history* | 13 (100.0%) | 22 (95.7%) | 0.999 | NA | 0.995 | ||
| MLST* | 0.604 | NA | 0.995 | ||||
| ST191 | 13 (100.0%) | 20 (87.0%) | |||||
| ST357 | 0 (0.0%) | 1 (4.3%) | |||||
| ST858 | 0 (0.0%) | 1 (4.3%) | |||||
| ST872 | 0 (0.0%) | 1 (4.3%) | |||||
Data are presented as N (%), mean±SD for parametric variables, or median [1st quartile–3rd quartile] for non-parametric variables. Bold values are statistically significant (P<0.05).
*Categorical variables included in logistic regression.
All colistin-resistant Acinetobacter baumannii isolates were within clonal cluster 92.
Abbreviations: OR, odds ratio; CI, confidence interval; APACHE II, Acute Physiology and Chronic Health Evaluation II; ICU, intensive care unit; MLST, Multilocus sequence typing.