Table 2.

Infection characteristics.

	Hardware Removed	Reinstrumented	Hardware Retained with Suppression	Hardware Retained without Suppression	P Value	Test
Average days until first debridement: n (SD)	72.3 (85.5)	123.3 (147.2)	19.3 (7.8)	28.5 (21.1)	<.001	ANOVA F test
Infection appearance at first debridement: n (%)					.013	Fisher exact
Benign	1 (5.3%)	2 (33.3%)	0 (0%)	5 (29.4%)
Grossly purulent	10 (52.6%)	3 (50%)	10 (40%)	7 (41.2%)
Hematoma	5 (26.3%)	1 (16.7%)	8 (32%)	0 (0%)
Murky	3 (15.8%)	0 (0%)	7 (28%)	5 (29.4%)
Polymicrobial infections (%)	10 (52.6%)	3 (50%)	6 (24%)	3 (17.6%)	.077	Chi-square
Gram-negative infections (%)	7 (36.8%)	3 (50%)	9 (36%)	8 (47%)	.844	Chi-square
Most common microbe (n)	Staph epidermidis (9)	Staph epidermidis (3)	Staph epidermidis (11)	Staph aureus (5)
Second most common microbe (n)	Staph aureus (6)	Staph aureus (2)	Staph aureus (6)	Staph epidermidis (3)
List of all microbes	Staph epidermidis Staph aureus Propionibacterium acnes Acinetobacter iwoffii Coryneobacterium Enterococcus faecalis Enterobacter cloacae Proteus mirabilis Enterococcus faecium Escherichia coli Streptococcus anginosus	Staph epidermidis Staph aureus Klebsiella pneumoniae Morganella Pseudomonas aeruginosa Enterococcus faecalis Propionibacterium acnes Escherichia coli	Staph epidermidis Staph aureus Klebsiella oxytoca Klebsiella pneumoniae Pseudomonas aeruginosa Propionibacterium acnes Coryneobacterium Citerobacter freundii Enterococcus faecalis Enterobacter cloacae Enterococcus faecium Escherichia coli Citrobacter koserii	Staph aureus Staph epidermidis Klebsiella pneumoniae Pseudomonas aeruginosa Coryneobacterium Proteus mirabilis Citerobacter freundii Enterococcus faecalis Enterobacter cloacae Enterococcus faecium Escherichia coli

Abbreviation: ANOVA, analysis of variance.