Table 3.
Baseline characteristics of SAB cases (m-SAB VS p-SAB).
| Characteristic | n | Monomicrobial SAB (n = 541) | Polymicrobial SAB (n = 31) | p-Value |
|---|---|---|---|---|
| Age, years | 572 | 66.8 (54.4–78.5) | 65.5 (54.9–77.7) | 0.877 1 |
| Sex: Female | 572 | 214 (39.6%) | 13 (41.9%) | 0.792 2 |
| Diabetes Mellitus | 572 | 249 (46.0%) | 9 (29.0%) | 0.064 2 |
| Liver Disease | 572 | 156 (28.8%) | 14 (45.2%) | 0.053 2 |
| Chronic Kidney Disease | 572 | 0.789 2 | ||
| No | 322 (59.5%) | 18 (58.1%) | ||
| Yes, without HD | 168 (31.1%) | 11 (35.5%) | ||
| Yes, with HD | 51 (9.4%) | 2 (6.5%) | ||
| Charlson Comorbidity Index | 572 | 6.0 (3.0–9.0) | 8.0 (2.5–10.5) | 0.265 1 |
| Source of SAB | 572 | |||
| SSTI | 203 (37.5%) | 9 (29.0%) | 0.341 2 | |
| CRBSI | 67 (12.4%) | 9 (29.0%) | 0.008 2 | |
| CAUTI | 43 (7.9%) | 7 (22.6%) | 0.005 2 | |
| Unknown | 108 (20.0%) | 7 (22.6%) | 0.724 2 | |
| Pneumonia | 70 (12.9%) | 1 (3.2%) | 0.111 2 | |
| Septic Arthritis | 52 (9.6%) | 1 (3.2%) | 0.233 2 | |
| Other | 86 (15.9%) | 0 (0.0%) | 0.016 2 | |
| Site of Infection Onset | 570 | 0.027 2 | ||
| Nosocomial | 57 (10.6%) | 5 (16.1%) | ||
| Healthcare Associated | 265 (49.2%) | 21 (67.7%) | ||
| Community Acquired | 217 (40.3%) | 5 (16.1%) | ||
| Type of SAB: MRSA | 560 | 232 (43.8%) | 10 (33.3%) | 0.261 2 |
| ICU Admission | 571 | 144 (26.7%) | 9 (29.0%) | 0.772 2 |
| ID Consult | 571 | 424 (78.5%) | 28 (90.3%) | 0.116 2 |
| Hospitalization | 572 | 532 (98.3%) | 31 (100.0%) | 1.000 3 |
| TTE Obtained | 569 | 178 (33.1%) | 16 (51.6%) | 0.034 2 |
| TEE Obtained | 567 | 257 (47.9%) | 7 (22.6%) | 0.006 2 |
Values represent median (quartile 1 to quartile 3) for continuous variables and frequency (percentage) for categorical variables. n is the number of non-missing values. p values are by 1 Wilcoxon rank sum, 2 Pearson χ2, or 3 Fisher exact tests. Abbreviations: CAUTI, catheter-associated urinary tract infection; CRBSI, catheter-related bloodstream infections; HD, hemodialysis; MRSA, ICU, intensive care unit; ID, infectious diseases; methicillin-resistant Staphylococcus aureus; MSSA, methicillin-susceptible Staphylococcus aureus; SAB, Staphylococcus aureus bacteremia, TTE, transthoracic echocardiography; TEE, transesophageal echocardiography.