TABLE 2.
PJI rate and microorganisms isolated according to prophylaxis group
| Variable | No. (%) of patients |
P valuea | |
|---|---|---|---|
| C group (n = 995) | CT group (n = 791) | ||
| Presence of PJI | 35 (3.5) | 10 (1.3) | 0.002 |
| Gram-positive microorganismb | 29 (2.9) | 7 (0.9) | 0.002 |
| Gram-negative microorganism | 6 (0.6) | 3 (0.4) | 0.739 |
| Polymicrobial infection | 8 (0.8) | 6 (0.8) | 0.914 |
| Microorganism | |||
| Staphylococcus aureus | 16 (1.6) | 0 (0) | <0.001 |
| Methicillin-resistant S. aureus | 5 (0.5) | 0 (0) | 0.046 |
| CoNS | 15 (1.5) | 6 (0.8) | 0.145 |
| Methicillin-resistant CoNS | 10 (1.0) | 3 (0.4) | 0.122 |
| Enterococcus faecalis | 2 (0.2) | 1 (0.1) | 0.842 |
| Escherichia coli | 3 (0.3) | 2 (0.3) | 0.847 |
| Pseudomonas aeruginosa | 2 (0.2) | 3 (0.4) | 0.847 |
| Klebsiella pneumoniae | 0 (0) | 1 (0.1) | 0.908 |
| Proteus mirabilis | 1 (0.1) | 0 (0) | 0.908 |
| Enterobacter cloacae | 1 (0.1) | 1 (0.1) | 0.871 |
| Morganella morganii | 0 (0) | 1 (0.1) | 0.908 |
| Citrobacter koseri | 1 (0.1) | 0 (0) | 1.000 |
a
Boldface values indicate statistically significant differences.
b
Data for polymicrobial infections with Gram-positive microorganisms were included in the Gram-positive microorganism group.