Analysis of the clinical efficacy of two-stage revision surgery in the treatment of periprosthetic joint infection in the knee: A retrospective study

Table 1 Pathogenetic results of periprosthetic joint infection after total knee arthroplasty in 27 cases

	Pathogenic bacteria	Number of cases	Proportion (%)
Gram-positive bacteria	S. aureus	8	48.1
	Methicillin-resistant S. aureus	2
	S. epidermidis	2
	Ste. griseus	1
Gram-negative bacteria	E. cloacae	2	11.1
	P. aeruginosa	1
Fungi	Candida	1	3.7
Negative bacterial culture	Not assessed	10	37.0

Table 2 Comparison of preoperative and final follow-up erythrocyte sedimentation rate and C-reactive protein results

Indicators	Preoperative exclusion	Final follow-up	T value	P values
ESR (mm/h)	57.1 ± 21.8	14.5 ± 6.3	9.043	< 0.001
CRP (mg/dL)	2.9 ± 2.1	0.6 ± 0.4	5.804	< 0.001

Data are presented as mean ± SD. P < 0.05 indicates statistical significance. ESR: Erythrocyte sedimentation rate; CRP: C-reactive protein.

Table 3 Comparison of preoperative and final follow-up knee pain visual analogue scale scores, hospital for special surgery scores, and range of motion results

Indicators	Preoperative exclusion	Final follow-up	T value	P values
VAS (score)	4.0 ± 0.8	1.1 ± 0.7	18.028	< 0.001
HSS (score)	57.9 ± 9.4	82.3 ± 7.1	-21.813	< 0.001
ROM (°)	91.9 ± 26.9	108.0 ± 19.7	-7.148	< 0.001

Data are presented as mean ± SD. P < 0.05 indicates statistical significance. VAS: Visual analogue scale; HSS: hospital for special surgery; ROM: Range of motion.