Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 1 Demographic, clinical and laboratory characteristics of patients with monomicrobial and polymicrobial PJI
Variable | Monomicrobial infection (n = 135) | Polymicrobial infection (n = 54) | p value |
|---|---|---|---|
Age, years | 57 (49–67) | 57 (44–69) | 0.84 |
WBC × 103/μL | 8.1 (6.2–9.9) | 7.3 (5.5–9.1) | 0.1 |
BMI, kg/m2 | 26 (24–28) | 28 (26–30) | 0.01 |
≤25, n | 42 (31.1 %) | 9 (16.7 %) | 0.05 |
>25, n | 93 (68.9 %) | 45 (83.3 %) | |
ESR, mm/h | 25 (15–40) | 26 (15–49) | 0.64 |
≤30, n | 85 (63.0 %) | 31 (57.4 %) | 0.51 |
>30, n | 50 (37.0 %) | 23 (42.6 %) | |
CRP, mg/L | 5.7 (4.0–10.0) | 8.8 (5.0–27) | 0.01 |
≤10, n | 101(74.8 %) | 31 (57.4 %) | 0.02 |
>10, n | 34 (25.2 %) | 23 (42.6 %) | |
PJI after prior revision surgery, n | 34 (25.1 %) | 11 (20.4 %) | 0.57 |
Manifestation of infection, days | 365 (90–1500) | 600 (120–1575) | 0.76 |
Pain, n | 134 (99.3 %) | 54 (100 %) | 1.0 |
Sinus tract, n | 100 (74.1 %) | 46 (85.2 %) | 0.13 |
Wound dehiscence, n | 1 (0.7 %) | 0 | 1.0 |
Duration of infection, days | 150 (60–300) | 165 (60–400) | 0.47 |
Duration of surgery, min | 190 (160–240) | 200 (171–230) | 0.62 |
Blood loss, mL | 800 (600–1200) | 900 (600–1200) | 0.71 |
Drainage blood loss, mL | 250 (140–350) | 300 (200–300) | 0.70 |
With articulating spacer, n | 73 (54.1) | 24 (44.4) | 0.26 |
Concomitant pathology | |||
Cardiovascular pathology, n | 99 (73.3 %) | 36 (66.7 %) | 0.37 |
Diabetes mellitus, n | 27 (20.0 %) | 11 (20.4 %) | 1.0 |
COPD, n | 24 (17.8 %) | 8 (14.8 %) | 0.68 |
Indication for THA | |||
Osteoarthritis, n | 80 (59.3 %) | 39 (72.2 %) | 0.13 |
Secondary osteoarthritis with rheumatoid arthritis, n | 12 (8.9 %) | 2 (3.7 %) | 0.36 |
Femoral head fracture, n | 19 (14.1 %) | 5 (9.3 %) | 0.47 |
Avascular necrosis of the femoral head, n | 24 (17.8 %) | 8 (14.8 %) | 0.68 |