Long-Term Results of Charité Lumbar Disc Replacement: A 17-Year Follow-Up in a Workers’ Compensation Cohort

Jack Carlson; Matthew Giblin

doi:10.14444/8345

Article Figures & Data

Tables

View popup

Table 1

Mann-Whitney U test (lost vs found preoperative VAS and age at surgery) and Fisher exact test (lost vs found gender).

Patient Characteristics	Patients Followed Up (n = 16)	Patients Lost to Follow Up (n = 10)	P Value
Preoperative VAS scores, mean	9.5	7.5	0.001
Age at surgery, mean	42.0	37.4	0.16
Gender, male:female	8:8	7:3	0.28
Workers’ compensation, n	16	10

Abbreviations: VAS, visual analog scale.
Note: Boldface indicates statistically significant findings.

View popup

Table 2

Mann-Whitney U test (further surgery vs no further surgery age, VAS preoperative, VAS postoperative, EQ-5D-5L) and Fisher exact test (further surgery vs no further surgery gender and opioid use).

Patient Characteristics	No Further Surgery (n = 10)	Further Surgery (n = 6)	P Value
Gender, male:female	4:6	4:2	0.94
Age at surgery, y, mean	41	44	0.91
VAS preoperative, mean	9.6	9.5	1.0
VAS postoperative, mean	1.8	5.3	0.004
Postoperative opioid use, %	0%	83%	0.042
Quality of life, mean	0.81	0.45	0.002

Abbreviations: EQ-5D-5L, EuroQol 5-Dimension 5-level instument; VAS, visual analog scale.
Note: Boldface indicates statistically significant findings.

View popup

Table 3

Further surgeries required after TDR.

Index TDR Site	Reoperation	Duration Between Surgeries
L5-S1 TDR (2003)	L4-L5 fusion (2016) L3-L4 TDR (2016)	13 y
L5-S1 TDR (2004)	L3-L4 fusion (2009)	5 y
L3-L4-L5 TDR (2003)	L5-S1 fusion (2016)	13 y
L5-S1 TDR (2002)	Foraminotomy (2003)	1 y
L4-L5-S1 TDR (2003)	L3-L4 fusion (2010) L4-L5 fusion (2018)^{^a} L5-S1 fusion (2019)^{^a}	7 y
L4-L5 TDR (2003)	Discectomy (2004) L4-L5-S1 fusion (2005)^{^a}	1 y

Abbreviations: TDR, total disc replacement.
↵a Denotes further surgery at the index (operated) level.

View popup
Table 4
Wilcoxon signed rank test (preoperative vs postoperative VAS).
Patient population VAS Preoperative VAS 17.2 y P Value
Total patients 8.8 (n = 26) 3.1 (n = 16)
Followed up 9.5 (n = 16) 3.1 (n = 16) <0.001
Lost to follow-up 7.5 (n = 10) N/A
Abbreviations: N/A, not applicable; VAS, visual analog scale.
Note: Boldface indicates statistically significant findings.