Table 2.

Distribution of sonication fluid culture results and tissue culture results compared to whether there were clinical signs of infection in 252 revision arthroplasty surgery cases

	Clinical signs of infection
	Positive	Negative	Total
Sonicate (CFU ≥50/mL)
Positive	35	2	37
Negative	40	175	215
Total	75	177	252
Tissue cultures (≥ 2)
Positive (≥ 2)	51	35	86
Negative (< 2)	24	142	166
Total	75	177	252

CFU: colony-forming units.