Table 2 |
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|
Descriptive data of study population (n = 105) |
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|
Mean ± SD |
n (%) |
|
|
|
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|
Demographics |
||
|
Age (years) |
61.4 ± 6.9 |
|
|
Gender (female) |
73 (70) |
|
|
Duration of knee complaints (years) |
11.3 ± 9.3 |
|
|
Body mass index (kg/m2) |
29.1 ± 4.7 |
|
|
Radiographic severitya |
||
|
K-L score 0/1 |
32 (31) |
|
|
K-L score 2 |
28 (27) |
|
|
K-L score 3 |
26 (25) |
|
|
K-L score 4 |
19 (18) |
|
|
Pain severity (NRS, 0 to 10) |
5.1 ± 2.1 |
|
|
Biomechanical factors |
||
|
Quadriceps muscle strength (Nm/kg)a |
0.89 ± 0.47 |
|
|
Hamstrings muscle strength (Nm/kg)a |
0.61 ± 0.26 |
|
|
Proprioceptive accuracy (degrees)a |
2.9 ± 1.9 |
|
|
Varus-valgus laxity (degrees)a |
6.9 ± 2.8 |
|
|
Physical examination findings |
||
|
Bony tenderness (yes)a |
75 (71) |
|
|
Crepitus (yes)a |
86 (82) |
|
|
Bony enlargement (yes)a |
12 (11) |
|
|
Palpable warmth (yes)a |
4 (4) |
|
|
Tissue abnormalities, detected by CR |
Median (range) |
n |
|
Joint space widtha |
||
|
MTF (0, 1, 2, 3)b |
5, 29, 31, 40 |
|
|
LTF (0, 1, 2, 3)b |
68, 20, 10, 7 |
|
|
PF (0, 1, 2, 3)b |
31, 44, 22, 8 |
|
|
Osteophytesa |
||
|
MTF (0, 1, 2, 3)c |
21, 57, 24, 3 |
|
|
LTF (0, 1, 2, 3)c |
43, 49, 11, 2 |
|
|
PF (0, 1, 2, 3)c |
11, 67, 25, 2 |
|
|
Tissue abnormalities, detected by MRI |
||
|
Cartilage integritya |
||
|
MTF (0 to 6) |
4 (0 to 6) |
|
|
LTF (0 to 6) |
2 (0 to 6) |
|
|
PF (0 to 12) |
2 (0 to 12) |
|
|
Osteophytesa |
||
|
MTF (0 to 9) |
3 (0 to 9) |
|
|
LTF (0 to 9) |
2 (0 to 9) |
|
|
PF (0 to 18) |
5 (0 to 12) |
|
|
Bone marrow lesionsa |
||
|
MTF (0 to 6) |
1 (0 to 6) |
|
|
LTF (0 to 6) |
0 (0 to 6) |
|
|
PF (0 to 12) |
0 (0 to 8) |
|
|
Effusion (0, 1, 2, 3)a,d |
34, 31, 27, 13 |
|
|
Synovitisa presence, n (%) |
||
|
In at least one region |
36 (34) |
|
|
In Hoffa's fat pad |
31 (30) |
|
|
In medial posterior-condylar region |
13 (12) |
|
|
In lateral posterior-condylar region |
12 (11) |
|
|
In medial recess |
6 (6) |
|
|
In lateral recess |
7 (7) |
|
|
|
||
|
CR, conventional radiography; K-L, Kellgren-Lawrence; LTF, lateral tibiofemoral compartment; MRI, magnetic resonance imaging; MTF, medial tibiofemoral compartment; NRS: numeric rating scale; PF, patellafemoral compartment; SD, standard deviation. aData from index knee. b0 = none, 1 = minute narrowing (0 to 33%); 2 = definite narrowing (33 to 66%); 3 = ankylosis (66 to 99%). c0 = none, 1 = minute, 2 = definite, 3 = large. d0 = none, 1 = mild; 2 = moderate; 3 = severe. |
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|
Knoop et al. Arthritis Research & Therapy 2012 14:R212 doi:10.1186/ar4050 |
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