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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