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Table 4 Clinical outcomes of the culture-negative group and the culture-positive group

From: Clinical outcomes of two-stage revision for chronic periprosthetic joint infection of the knee: culture-negative versus culture-positive

 

Culture-negative group

(n = 57)

Culture-positive group

(n = 79)

p value

Reoperation after first-stage surgery, n (%)

6 (10.5%)

20 (25.3%)

0.045

Failure to reimplant, n (%)

14 (24.6%)

25 (31.6%)

0.444

Duration from the first-stage to second-stage surgery, month

5.2 ± 4.2 (2–22)

5.9 ± 4.5 (2–24)

0.394

Reoperationa after second-stage surgery, n (%)

5 (11.6%)

7 (13.0%)

1.0

Reinfectionb after second-stage surgery, n (%)

5 (13.9%)

6 (12.2%)

1.0

Mortality, n (%)

2 (3.5%)

3 (3.8%)

1.0

Failure ratec, n (%)

19 (33.3%)

31 (39.2%)

0.589

  1. Data are presented as means ± standard deviation (range) unless otherwise indicated. aComparison of the reoperation rate evaluated among the subjects who received the second-stage surgery (culture-negative group: 43 cases, culture-positive group: 54 cases); bComparison of the reoperation rate evaluated among the subjects who were followed up for more than 1 year after the second-stage surgery (culture-negative group: 36 cases, culture-positive group: 49 cases); cOne of the following conditions was defined as failure: failure to reimplant, infection-related or surgery-related death, or recurrence of periprosthetic joint infection after the reimplantation surgery