Table 1.
Characteristics of the study population
| |
Floor layers |
Graphic designers |
||
|---|---|---|---|---|
| (n=134) | (n=120) | |||
|
Age, years (mean, SD) |
52.6 |
6.9 |
57.9 |
5.9 |
|
Duration of employment, years (mean, SD) |
29.2 |
10.2 |
35.6 |
8.6 |
|
BMI, kg/m2(mean, SD) |
26.4 |
3.8 |
26.0 |
3.9 |
|
Knee complaints during past 12 months (yes %) |
70 |
52.2 |
46 |
38.3 |
|
Knee-straining sports*(yes: n, %) |
71 |
53.0 |
80 |
66.7 |
|
Knee osteoarthritis | ||||
| Tibio-femoral, TF OA (grade 1–3), (n %) |
22 |
16.4 |
15 |
12.5 |
| Patellofemoral, PF OA (grade 1–3), (n %) |
12 |
9.0 |
21 |
17.5 |
| KOOS: | ||||
| Pain (mean, SD) |
79.98 |
19.9 |
89.40 |
14.3 |
| Symptom (mean, SD) |
81.28 |
17.2 |
89.14 |
12.3 |
| ADL (mean, SD) |
82.22 |
18.9 |
88.91 |
16.0 |
| Sport_re (mean, SD) |
69.51 |
28.3 |
78.15 |
25.9 |
| QOL (mean, SD) |
67.82 |
26.6 |
77.94 |
23.5 |
|
Meniscal tears |
(n=85)** |
(n=40)** |
||
| Medial (n, %) |
56 |
65.9 |
19 |
47.5 |
| Lateral (n, %) | 12 | 14.1 | 8 | 20.0 |
*Defined as football, handball, badminton, tennis, volleyball, ice hockey, and weight lifting.
**Missing: seven floor layers and nine graphic designers, who did not answer the KOOS questionnaire.