Prevalence of organisms in different risk groups (numbers in parentheses are percentages)
| S aureus | Streptococci (not including enterococci) | Gram negative | H influenzae | Total with positive microbiology | |
|---|---|---|---|---|---|
| Overall | 111 (54) | 36 (18) | 29 (15) | 15 (7.5) | 199 |
| Age (y) | |||||
| < 5 | 5 (18) | 6 (21) | 2 (7) | 13 (46) | 28 |
| 5–15 | 12 (63) | 5 (26) | 2 (11) | 0 (0) | 19 |
| 16–64 | 50 (65) | 7 (9) | 15 (19) | 1 (1) | 77 |
| >65 | 44 (59) | 18 (24) | 10 (13) | 1 (1) | 75 |
| Diabetes | 6 (55) | 1 (9) | 4 (36.4) | 0 (0.0) | 11 |
| Corticosteroid | 12 (60) | 4 (20) | 4 (20.0) | 0 (0.0) | 20 |
| RA | 23 (70) | 5 (15) | 4 (12.1) | 0 (0.0) | 33 |
| OA | 18 (20) | 4 (4) | 1 (1.1) | 0 (0.0) | 31 |
| Prosthetic material | 18 (75) | 1 (4) | 2 (8.3) | 1 (4.2) | 24 |