|
Variable
|
Baseline N (%)
|
All observations N (%)
|
|---|
|
N
|
4278
|
14,161
|
|
Symptomatic OA statusa (2-scale)
|
|
No
|
3134 (73.8)
|
9538 (67.8)
|
|
Yes, uni- or bilateral
|
1114 (26.2)
|
4536 (32.2)
|
|
Symptomatic OA statusa (3-scale)
|
|
No
|
3134 (73.8)
|
9538 (67.8)
|
|
Yes, unilateral
|
762 (17.9)
|
2999 (21.3)
|
|
Yes, bilateral
|
352 (8.3)
|
1537 (10.9)
|
|
K-L grade ≥ 2 (2-scale)
|
|
No
|
1860 (43.5)
|
3395 (24.0)
|
|
Yes, uni- or bilateral
|
2418 (56.5)
|
10,766 (76.0)
|
|
K-L grade ≥ 2 (3-scale)
|
|
No
|
1860 (43.5)
|
3395 (24.0)
|
|
Yes, unilateral
|
1112 (26.0)
|
4785 (33.8)
|
|
Yes, bilateral
|
1306 (30.5)
|
5981 (42.2)
|
|
The highest K-L grade
|
|
0
|
1199 (28.0)
|
2051 (14.5)
|
|
1
|
661 (15.5)
|
1344 (9.5)
|
|
2
|
1288 (30.1)
|
5544 (39.1)
|
|
3
|
841 (19.7)
|
3693 (26.1)
|
|
4
|
289 (6.8)
|
1529 (10.8)
|
|
Mean of K-L grades
|
|
0.0
|
1199 (28.0)
|
2051 (14.5)
|
|
0.5
|
383 (9.0)
|
774 (5.5)
|
|
1.0
|
612 (14.3)
|
2032 (14.3)
|
|
1.5
|
550 (12.9)
|
2346 (16.6)
|
|
2.0
|
728 (17.0)
|
3151 (22.3)
|
|
2.5
|
391 (9.1)
|
1660 (11.7)
|
|
3.0
|
313 (7.3)
|
1470 (10.4)
|
|
3.5
|
100 (2.3)
|
566 (4.0)
|
|
4.0
|
2 (0.0)
|
111 (0.8)
|
|
Combination of K-L grades
|
|
(0;0)
|
1199 (28.0)
|
2051 (14.5)
|
|
(1;0)
|
383 (9.0)
|
774 (5.5)
|
|
(1;1)
|
278 (6.5)
|
570 (4.0)
|
|
(2;0)
|
334 (7.8)
|
1462 (10.3)
|
|
(2;1)
|
403 (9.4)
|
1714 (12.1)
|
|
(2;2)
|
551 (12.9)
|
2368 (16.7)
|
|
(3;0)
|
147 (3.4)
|
632 (4.5)
|
|
(3;1)
|
123 (2.9)
|
525 (3.7)
|
|
(3;2)
|
340 (7.9)
|
1466 (10.4)
|
|
(3;3)
|
231 (5.4)
|
1070 (7.6)
|
|
(4;0)
|
54 (1.3)
|
258 (1.8)
|
|
(4;1)
|
51 (1.2)
|
194 (1.4)
|
|
(4;2)
|
82 (1.9)
|
400 (2.8)
|
|
(4;3)
|
100 (2.3)
|
566 (4.0)
|
|
(4;4)
|
2 (0.0)
|
111 (0.8)
|
- aK-L grade ≥ 2 and knee pain on more than half the days during past month in the same knee
