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Table 2 The demographic characteristics of PJI patients included in this study

From: The concordance between preoperative aspiration and intraoperative synovial fluid culture results: intraoperative synovial fluid re-cultures are necessary whether the preoperative aspiration culture is positive or not

  Total N = 187 Concordant group N = 147 Discordant group N = 40 P-value (concordant vs. discordant)
Age** 62.04 (60.09, 63.99) 62.18 (59.89, 64.48) 61.5 (57.86, 65.14) 0.434
Male** 98, 52.41% 77/147, 52.38% 21/40, 52.5% 0.989
BMI** 25.59 (25.08, 26.10) 25.73 (25.12, 26.30) 25.11 (23.96, 26.25) 0.446
Knee** 103, 55.08% 89/147, 60.54% 14/40, 35%  
Comorbidity
 Diabetes 19, 10.16% 17, 11.56% 2, 5% 0.374
  IJDa 5, 2.67% 4, 2.72% 1, 2.5% 1.00
ASA score
 1 1, 0.53% 1, 0.68% 0% 1.00
 2   128, 87.07% 39, 97.5% 0.081
 3 19, 10.16% 18, 12.24% 1, 2.5% 0.081
 4 0 0 0 1.00
Organisms
  Culture negative 46, 24.60% 37, 25.17% 9, 22.5% 0.728
Staphylococcus spp. 90, 48.13% 74, 50.34% 16, 4% 0.246
 Enterococcus spp. 11, 5.88% 9, 6.12% 2, 5% 1.00
 Streptococcus spp. 12,6.41% 4, 2.72% 8, 20% 0.001*
Gram-positive bacilli 4,2.14% 4, 2.7% 0 0.579
Gram-negative bacteria 11, 5.88% 10, 6.8% 1, 2.5% 0.462
 Fungi 9, 4.81  8, 5.44% 1, 2.5% 0.687
 Polymicrobial PJI 4, 2.13% 1, 0.68% 3, 7.5% 0.031
  1. aIJD: Inflammatory Joint Diseases
  2. **Values were given as means with the 95 %CI in the parentheses
  3. *P < 0.05