Introduction of total knee arthroplasty in Lithuania

Figures & data

Table 1. Data on TKR patients in Klaipeda (Lithuania) and Sweden

Country	A	B	C	D	E
Sweden	1,280	885	59	320	73 [7.5] (33–94)
Klaipeda	595	519	24	60	68 [7.2] (37–85)

A: Total number

B: Female patients

C: Revised

D: Dead, unrevised

E: Mean age [SD] (range)

Figure 1. Cumulative revision rate (all types of revisions) with 95% confidence intervals for Klaipeda and Sweden; p = 0.56 (Wilcoxon test).

Figure 2. Cumulative revision rate (excluding patella additions) with 95% confidence intervals for Klaipeda and Sweden; p = 0.15 (Wilcoxon test).

Table 2. Breakdown of types of revision

Reason for revision	Sweden n=59	Klaipeda n=24
Loosening	12	12
Wear	4	0
Infection	9	7
Instability	2	2
Malposition	0	3
Fracture	1	0
Patella	24	0
Pain NUD	4	0
Other	3	0

Table 3. Cox regression data. Lithuania is used as reference for Sweden, and males are used as reference for females

	RR	95% CI	p-value
All revisions
Age	0.94	0.92–0.97	< 0.001
Location	1.55	0.94–2.57	0.08
Sex	1.09	0.65–1.81	0.8
Patella revisions excluded
Age	0.95	0.92–0.97	< 0.001
Location	0.91	0.52–1.59	0.7
Sex	1.15	0.61–2.16	0.7