Mean scores

Knee » PROMs » Mean scores » NRS (rest)

FIGURE Mean pre-operative, 6 months and 12 months postoperative NRS (rest) scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean NRS (rest) scores

NRS (rest) score Pre-operative 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI) n Mean (95% CI)
Men 19,801 4.9 (4.8-4.9) 13,441 1.8 (1.7-1.8) 11,494 1.4 (1.3-1.4)
Women 33,642 5.4 (5.4-5.4) 21,469 2.0 (1.9-2.0) 57,659 1.6 (1.6-1.7)
Total² 53,466 5.2 (5.2-5.2) 34,923 1.9 (1.9-2.3) 30,013 1.5 (1.5-1.6)

¹ The 12 months NRS (rest) score is not (yet) available for 2019.
² Also contains NRS (rest) scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The NRS (rest) score measures pain during rest. The score has a range of 0.0 to 10.0, with 0.0 representing no pain and 10.0 representing the most possible pain.

Knee » PROMs » Mean scores » NRS (activity)

FIGURE Mean pre-operative, 6 months and 12 months postoperative NRS (activity) scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean NRS (activity) scores

NRS (activity) score Pre-operative 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI) n Mean (95% CI)
Men 19,793 7.0 (7.0-7.1) 13,443 2.7 (2.6-2.7) 11,502 2.1 (2.1-2.2)
Women 33,623 7.4 (7.4-7.4) 21,486 3.0 (2.9-3.0) 18,532 2.5 (2.4-2.5)
Total² 53,439 7.3 (7.3-7.3) 34,942 2.9 (2.8-2.9) 30,046 2.3 (2.3-2.4)

¹ The 12 months NRS (activity) score is not (yet) available for 2019.
² Also contains NRS (activity) scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The NRS (activity) score measures pain during activity. The score has a range of 0.0 to 10.0, with 0.0 representing no pain and 10.0 representing the most possible pain.

Knee » PROMs » Mean scores » EQ5D index score

FIGURE Mean pre-operative, 6 months and 12 months postoperative EQ-5D index scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean EQ-5D index scores

EQ-5D Index score Pre-operative 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI) n Mean (95% CI)
Men 20,711 0.65 (0.64-0.65) 14,057 0.84 (0.84-0.85) 12,226 0.87 (0.87-0.87)
Women 35,100 0.57 (0.57-0.58) 22,337 0.81 (0.81-0.82) 76,166 0.83 (0.82-0.83)
Total² 55,836 0.60 (0.60-0.60) 36,408 0.83 (0.82-0.83) 31,882 0.84 (0.84-0.84)

¹ The 12 months EQ-5D index score is not (yet) available for 2019.
² Also contains EQ-5D index scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The EQ-5D index score measures quality of life. The score has a range of -0.329 to 1.0, with 1.0 representing the best possible quality of life.

Knee » PROMs » Mean scores » EQ5D thermometer

FIGURE Mean pre-operative, 6 months and 12 months postoperative EQ-5D thermometer scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean EQ-5D thermometer scores

EQ-5D thermometer score Pre-operative 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI) n Mean (95% CI)
Men 20,790 70.0 (69.8-70.3) 14,179 76.2 (75.9-76.5) 12,382 76.8 (76.5-77.2)
Women 35,191 65.9 (65.7-66.2) 22,603 73.1 (72.8-73.4) 19,919 73.6 (73.3-73.8)
Total² 56,007 67.5 (67.3-67.6) 36,795 74.3 (74.1-74.5) 32,315 74.8 (74.6-75.0)

¹ The 12 months EQ-5D thermometer score is not (yet) available for 2019.
² Also contains EQ-5D thermometer scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The EQ-5D thermometer score measures the health situation. The score has a range of 0.0 to 100.0, with 0.0 representing the worst possible health situation and 100.0 the best possible health situation.

Knee » PROMs » Mean scores » KOOS-PS score

FIGURE Mean pre-operative, 6 months and 12 months postoperative KOOS-PS scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean KOOS-PS scores

KOOS-PS score Pre-operative 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI) n Mean (95% CI)
Men 20,658 48.7 (48.5-48.9) 13,909 29.3 (29.0-29.5) 12,094 26.1 (25.8-26.3)
Women 34,653 53.4 (53.4-53.6) 21,624 31.8 ( 31.6-32.0) 18,892 29.7 (29.5-29.9)
Total² 55,334 51.6 (51.5-51.8) 35,547 30.8 (30.6-30.9) 31,000 28.3 (28.1-28.5)

¹ The 12 months KOOS-PS score is not (yet) available for 2019.
² Also contains KOOS-PS scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The KOOS-PS score measures the physical functioning of patients with osteoarthritis to the knee. The score has a range of 0.0 to 100.0, with 0.0 representing no effort and 100.0 the most possible effort.

Knee » PROMs » Mean scores » Oxford Knee score

FIGURE Mean pre-operative, 6 months and 12 months postoperative Oxford Knee scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean Oxford Knee scores

Oxford Knee score Pre-operative 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI) n Mean (95% CI)
Men 18,187 25.0 (24.9-25.1) 12,797 37.8 (37.6-38.0) 10,840 40.0 (39.8-40.1)
Women 30,662 21.6 (21.6-21.7) 20,195 35.8 (35.7-36.0) 17,273 37.7 (37.6-37.8)
Total² 48,866 22.9 (22.8-23.0) 33,002 36.6 (36.5-36.7) 28,123 38.6 (38.5-38.7)

¹ The 12 months Oxford Knee score is not (yet) available for 2019.
² Also contains Oxford Knee scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The Oxford Knee score measures the physical functioning and pain of patients with osteoarthritis to the knee. The score has a range of 0.0 to 48.0, with 0.0 representing no functional ability and 48.0 the most functional ability.

Knee » PROMs » Mean scores » NRS (satisfaction)

FIGURE Mean pre-operative, 6 months and 12 months postoperative NRS (satisfaction) scores of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean NRS (statisfaction) scores

NRS (satisfaction) 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI)
Men 12,087 7.8 (7.7-7.8) 10,380 8.1 (8.0-8.1)
Women 19,086 7.6 (7.6-7.7) 16,623 7.9 (7.8-7.9)
Total² 31,186 7.7 (7.7-7.7) 27,013 7.9 (7.9-8.0)

¹ The 12 months NRS (satisfaction) score is not (yet) available for 2019.
² Also contains NRS (satisfaction) scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The NRS (satisfaction) score measures patients’ satisfaction with the outcome of after joint replacement.
The score has a range of 1.0 to 10.0, with 1.0 representing very unsatisfied and 10.0 representing very satisfied.

Knee » PROMs » Mean scores » Anchor question: Daily functioning

FIGURE Mean pre-operative, 6 months and 12 months postoperative change in daily functioning of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean anchor question: Daily functioning

Anchor question score 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI)
Men 12,853 5.5 (5.5-5.5) 11,356 5.7 (5.7-5.7)
Women 20,611 5.5 (5.4-5.5) 18,370 5.6 (5.6-5.6)
Total² 33,478 5.5 (5.5-5.5) 29,739 5.7 (5.6-5.7)

¹ The 12 months anchor question score is not (yet) available for 2019.
² Also contains anchor question scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The anchor question measures change in daily functioning after joint replacement.
The score has a range of 1.0 to 7.0, with 1.0 representing very deteriorated and 7.0 representing very improved.

Knee » PROMs » Mean scores » Anchor question: Pain

FIGURE Mean pre-operative, 6 months and 12 months postoperative change in pain of patients who underwent a TKA for osteoarthritis by gender in the Netherlands in 2014-2019

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TABLE Mean anchor question: Pain

Anchor question score 6 months postoperative 12 months postoperative¹
Gender n Mean (95% CI) n Mean (95% CI)
Men 11,663 5.9 (5.9-5.9) 10,056 6.0 (6.0-6.1)
Women 18,698 5.8 (5.8-5.8) 16,266 5.9 (5.9-6.0)
Total² 30,374 5.8 (5.8-5.9) 26,334 6.0 (6.0-6.0)

¹ The 12 months anchor question score is not (yet) available for 2019.
² Also contains anchor question scores of patients whose gender was registered as unknown.
TKA: total knee arthroplasty; CI: confidence interval.

© LROI 2020

The anchor question measures change in pain degree after joint replacement.
The score has a range of 1.0 to 7.0, with 1.0 representing very deteriorated and 7.0 representing very improved.