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Table 2 Adjusted Mean Patient-Reported Outcomes and Improvements by Month (1:1 matching)

From: Patient-reported outcomes following cemented versus cementless primary total knee arthroplasty: a comparative analysis based on propensity score matching

Total Knee Arthroplasty

Cemented

Cementless

N

Mean

95% CI

N

Mean

95% CI

KOOS-Jr

Baseline

723

48.9

(47.8 – 50.0)

763

48.7

(47.5 – 49.8)

1-month

723

66.6

(65.4 – 67.8)

763

65.0

(63.7 – 66.2)

3-month

723

72.3

(71.1 – 73.6)

763

70.9

(69.6 – 72.2)

6-month

723

75.1

(73.8 – 76.3)

763

73.9

(72.6 – 75.3)

1-mon-Base

723

17.7

(16.5 – 18.9)

763

16.3

(15.1 – 17.5)

3-mon-Base

723

23.4

(22.1 – 24.6)

763

22.3

(21.0 – 23.5)

6-mon-Base

723

26.2

(24.9 – 27.4)

763

25.3

(24.0 – 26.6)

PROMIS-PH

Baseline

723

42.6

(42.0 – 43.2)

763

42.2

(41.6 – 42.9)

1-month

723

46.5

(45.9 – 47.1)

763

45.8

(45.1 – 46.4)

3-month

723

49.6

(49.0 – 50.2)

763

48.4

(47.7 – 49.1)

6-month

723

50.2

(49.6 – 50.9)

763

49.6

(49.0 – 50.3)

1-mon-Base

723

3.9

(3.4 – 4.5)

763

3.5

(3.0 – 4.0)

3-mon-Base

723

7.0

(6.5 – 7.6)

763

6.2

(5.6 – 6.7)

6-mon-Base

723

7.7

(7.1 – 8.2)

763

7.4

(6.8 – 8.0)

NPRS

Baseline

723

5.3

(5.1 – 5.5)

763

5.7

(5.6 – 5.9)

1-month

723

2.9

(2.7 – 3.1)

763

3.2

(3.0 – 3.4)

3-month

723

2.1

(1.9 – 2.3)

763

2.5

(2.3 – 2.7)

6-month

723

2.0

(1.8 – 2.2)

763

2.3

(2.1 – 2.5)

1-mon-Base*

723

-2.4

(-2.6 – -2.2)

763

-2.5

(-2.7 – -2.3)

3-mon-Base*

723

-3.2

(-3.4 – -3.0)

763

-3.2

(-3.4 – -3.0)

6-mon-Base*

723

-3.3

(-3.5 – -3.1)

763

-3.5

(-3.7 – -3.3)

  1. * Lower scores are better, so that negative signs represent improvement
  2. Note: Baseline, 1-month, 3-month, and 6-month represent absolute score at each time point, while 1-mon-Base, 3mon-Base, and 6-mon-Base represent changes at1,3,6 months from baseline