Parameter | Study patients (n = 115) | Controls (n = 230) | P |
Male | 56% | 52% | 0.57 |
Mean age ± SD (y) | 59 ± 16 | 58 ± 16 | |
Matching criteria | |||
S. aureus | n = 73 (64) | n = 146 (64) | 1.0 |
Streptococcus species | n = 30 (26) | n = 60 (26) | 1.0 |
Enterococcus species | n = 12 (10) | n = 24 (10) | 1.0 |
Community acquisition | 70% | 68% | 0.71 |
Additional risk factors | |||
Treatment delay | 27% | 45% | 0.01 |
Persistent fever | 46% | 37% | 0.13 |
Remaining possible risk factors | |||
Portal of entry unknown | 52% | 46% | 0.30 |
Central venous catheter not removed within 48 h | 5% | 8% | 0.50 |
Persistent positive blood cultures | 16% | 6%* | 0.006 |
Immune suppression | 22% | 17% | 0.30 |
↵* Not routinely obtained in control group.
Data presented in parentheses are percentages.