Table 6 Comparison of patient-reported outcomes and functional evaluation among those patients who scored 5 or 6 (“Much better”) on Section B of the Goodman scale and those scoring 4 or less (“Same or worse”)

Age at surgery

65 (48 to 86) (62 to 70)

70 (47 to 88) (62 to 77)

1.04 (0.98 to 1.11)

N/A

Male

49 (43%)

9 (50%)

1.31 (0.48 to 3.54)

N/A

WOMAC-pain

2 (0 to 8) (1 to 3)

10 (2 to 15) (6 to 14)

1.98 (1.47 to 2.68)*

0.94 (0.87 to 0.99)

WOMAC-Stiffness

1 (0 to 3) (0 to 2)

3 (0 to 8) (2 to 5)

3.00 (0.01 to 0.07)*

0.83 (0.71 to 0.95)

WOMAC-Function

7 (0 to 36) (4 to 14)

30 (11 to 55) (26 to 44)

1.17 (1.10 to 1.25)*

0.93 (0.87 to 0.98)

Kujala

77 (32 to 100) (66 to 87)

43 (29 to 78) (34 to 60)

0.89 (0.85 to 0.93)*

0.91 (0.84 to 0.98)

KOOS QL

69 (5 to 100) (50 to 81)

34 (12 to 87.5) (18.75 to 50)

0.95 (0.92 to 0.97)*

0.81 (0.69 to 0.93)

Anterior knee pain

25 (22%)

10 (56%)

4.4 (1.57 to 12.33)*

0.67 (0.54 to 0.79)

Follow-up

2.7 (1 to 5) (2 to 4)

3 (1 to 4) (2 to 4)

1.03 (0.77 to 1.40)*

0.58 (0.44 to 0.72)

ROM

115 (91 to 147) (107 to 123)

116 (80 to 132) (109 to 123)

0.98 (0.94 to 1.02)

N/A

Extension

2 (-6 to 16) (0 to 6)

2 (-12 to 12) (0 to 6)

0.92 (0.82 to 1.03)

N/A

Extension difference

2 (-12 to 16) (-2 to 4)

0 (-8 to 12) (4 to -4)

1.03 (0.93 to 1.15)

N/A

Flexion

112 (89 to 135) (106 to 120)

113 (82 to 127) (109 to 123)

0.99 (0.94 to 1.04)

N/A

Flexion difference

-5 (-33 to 21) (-12 to 2)

-8 (-42 to 17) (-12 to 0)

1.02 (0.97 to 1.06)

N/A

BMI at FU

31 (21 to 44) (29 to 33)

28 (23 to 37) (25 to 31)

0.83 (0.72 to 0.97)*

0.70 (0.56 to 0.83)

Up and Go test

9 (6 to 26) (8 to 10)

12 (6 to 33) (8 to 14)

1.16 (1.05 to 1.28)*

0.69 (0.52 to 0.86)

Sit-up test

14 (7 to 27) (12 to 15)

11 (3 to 19) (9 to 13)

0.74 (0.62 to 0.88)*

0.73 (0.58 to 0.88)

Muscular force

222 (94 to 405) (185 to 290)

177 (43 to 313) (118 to 246)

0.98 (0.98 to 0.99)*

0.69 (0.55 to 0.84)

Algometry

11 (2 to 37) (7 to 15)

8 (0 to 22) (5.4 to 12)

0.91 (0.82 to 1.01)

N/A