Arthroscopy combined with unicondylar knee arthroplasty for treatment of isolated unicompartmental knee arthritis: A long-term comparison

Table 4 Outcome scores and radiological information of the two groups at pre-operation and last follow-up

Group	Pre-operation	Last follow-up	mean difference (95%CI)	P
Group A
HSS score	59.6 ± 10.9	82.7 ± 9.3	23.2 (19.3-27.0)	0.000
Knee society score	47.3 ± 6.3	76.2 ± 13.1	28.9 (25.1-32.7)	0.000
Knee function score	57.5 ± 6.3	75.1 ± 19.6	17.5 (12.1-23.0)	0.000
FTA	179.9 ± 3.5	175.2 ± 2.5	4.7 (3.5-5.8)	0.000
HKA	175.1 ± 2.8	176.7 ± 3.1	1.6 (0.4-2.7)	0.008
ROM	121.5 ± 8.2	129.1 ± 11.5	7.6 (4.1-11.2)	0.000
Group B
HSS score	59.3 ± 15.6	84.3 ± 10.1	23.7 (18.9-28.5)	0.000
Knee society score	49.1 ± 9.2	75.1 ± 13.2	24.7 (19.9-29.5)	0.000
Knee function score	59.3 ± 9.0	77.4 ± 13.8	17.2 (12.8-21.6)	0.000
FTA	181.5 ± 5.0	175.0 ± 3.7	6.2 (4.5-7.8)	0.000
HKA	173.9 ± 3.7	176.5 ± 3.2	2.5 (1.0-4.0)	0.001
ROM	116.1 ± 17.3	131.1 ± 14.1	14.2 (8.7-19.7)	0.000

HSS: Hospital for special surgery; FTA: Femoral-tibial angle; HKA: Hip-knee-ankle angle; ROM: Range of motion.