Quality of life after knee revision arthroplasty

Figures & data

Table 1.  Indications for revision

Primary indication given for revision	No.
Aseptic loosening	43
Instability	14
Bone loss/fracture	10
Infection	6
Pain	5
Loss of range of movement	4
Polyethlene wear	4
Total	86

Table 2.  Prostheses removed and re-implanted at revision TKR

	Prosthesis removed	Prosthesis re-implanted
Kinemax condylar	46	46
Porous-coated anatomic	25	5
Kinemax super stabilizer	3	11
Duocondylar	3
Kinemax stabilizer	3	4
Rotating hinge	2	14
Freeman-Samuelson	1
Miller-Galante	1
Sheehan	2
Coordinate		2
Custom-made (hinged)		4
Total	86	86

Table 3.  Knee Society score (95% CI)

	Preoperative Knee Society score	Final review KSS
Sterile	85 (73–97)	128 (114–142)
Septic revision	72 (62–82)	113 (97–129)
First revision	90 (82–98)	138 (129–147)
Second revision	82 (73–91)	131 (119–143)
More than 2 revisions	74 (69–89)	110 (99–121)
Revision to unconstrained	76 (68–84)	128 (116–140)
Revision to constrained	84 (74–94)	103 (91–115)

Table 4.  Mean (95% CI) NHP scores for each domain plotted against time, 100 being the worst possible score

Category	Sleep	Energy	Emotion	Mobility	Social isolation	Pain
Normalized control	22	24	13	12	4	15
Preoperative	41 (33–49)	45 (39–51)	17 (14–20)	52 (49–55)	10 (8–12)	61 (55–67)
3 months	44 (35–53)	48 (42–54)	19 (16–22)	54 (50–58)	16 (14–18)	48 (40–56)
1 year	43 (34–52)	48 (41–55)	21 (17–25)	53 (49–57)	15 (13–17)	48 (39–57)
5 years	50 (42–58)	56 (44–68)	18 (15–21)	48 (44–52)	15 (13–17)	56 (47–63)

Age- and sex-matched scores (at the time of revision) are included as controls; normalized data were produced when the NHP was first published.

P = 0.01 for 3- and 12-month pain compared to preoperative status.