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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