TABLE 1.
Baseline characteristics of the population studied
| Characteristica | Total (n = 455) | Noninfected (n = 279) | Infected (n = 176) | Pb |
|---|---|---|---|---|
| Age (mean ±SD) (yr) | 69.6 ± 12.1 | 70.5 ± 11 | 68.3 ± 13.6 | 0.083 |
| Female (no./total no. [%]) | 237/453 (52.3) | 162/277 (58.5) | 75/176 (42.6) | 0.001 |
| Wt (median [IQR]) (kg) | 75 (64 to 87) | 74 (62 to 85) | 79.5 (65.8 to 92.2) | 0.003 |
| Excess wt (median [IQR]) (kg) | 5.7 −3.6 to 15.8 | 5.2 −3.7 to 14.3 | 6.4 −3.2 to 19.1 | 0.077 |
| First implant revision (no./total no. [%]) | 264/409 (64.5) | 172/257 (66.9) | 92/152 (60.5) | 0.23 |
| Site of prosthesis (no./total no. [%]) | ||||
| Hip | 301/454 (66.3) | 202/278 (72.7) | 99/176 (56.2) | <0.001 |
| Knee | 135/454 (29.7) | 71/278 (25.5) | 64/176 (36.4) | |
| Shoulder | 18/454 (4) | 5/278 (1.8) | 13/176 (7.4) | |
| Time since prosthesis insertion (no./total no. [%]) | ||||
| ≤3 mo | 37/441 (8.4) | 7/272 (2.6) | 30/169 (17.8) | <0.001 |
| >3 mo | 404/441 (91.6) | 265/272 (97.4) | 139/169 (82.2) | |
| Sinus tract (no./total no. [%]) | 46/455 (10.1) | - | 46/176 (26.1) | |
| CRP of ≥10 mg/literc | 217/442 (49.1) | 71/268 (26.5) | 146/174 (83.9) | <0.001 |
| ESR of ≥30 mm/hc | 169/389 (41.6) | 50/250 (20) | 112/139 (80.6) | <0.001 |
a
IQR, interquartile range; CRP, serum C-reactive protein; ESR, erythrocyte sedimentation rate.
b
Infected versus non-infected cases.
c
The cutoffs are taken from reference 8.