Performance of alpha-defensin lateral flow test after synovial fluid centrifugation for diagnosis of periprosthetic knee infection

Table 2 Patient demographics

	Total	Aseptic cases	Infected cases	P value
n	53	31	22
Sex				0.221
Male	14 (26.4)	6 (19.4)	8 (36.4)
Female	39 (73.6)	25 (80.6)	14 (63.6)
Age (range)	68 (47-85)	67 (47-85)	70 (52-85)	0.302
Laterality				> 0.991
Right knee	28 (52.8)	16 (51.6)	12 (54.5)
Left knee	25 (47.2)	15 (48.4)	10 (45.5)
Inflammatory disease	12 (22.6)	7 (22.6)	5 (22.7)	> 0.991
RA	10 (18.9)	7 (22.6)	3 (13.6)
Gout	2 (3.8)	0	2 (9.1)
Sinus tract	4 (7.5)	0	4 (18.2)
Alpha-defensin S/CO	2.21 ± 2.73	0.28 ± 0.13	4.93 ± 2.28	< 0.013

¹Fisher's exact test.

²Unpaired t test.

³Mann-Whitney test. Values expressed in number (percentage). Age in years is presented as mean (range) and alpha-defensin S/CO in mean (standard deviation). RA: Rheumatoid arthritis.