Table 1 |
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|
Characteristics of the study population |
||||
|
Total (n = 126) |
Men (n = 58) |
Women (n = 68) |
Pa |
|
|
|
||||
|
Age, years |
63.6 ± 10.1 |
64.2 ± 10.0 |
63.2 ± 10.3 |
0.58 |
|
Height, cm |
167.7 ± 9.1 |
174.6 ± 6.8 |
161.8 ± 6.1 |
<0.001 |
|
Weight, kg |
81.4 ± 15.5 |
85.1 ± 14.9 |
78.3 ± 15.3 |
0.01 |
|
BMI, kg/m2 |
28.9 ± 5.1 |
27.8 ± 3.8 |
29.9 ± 5.8 |
0.02 |
|
WOMAC score |
436 ± 224 |
411 ± 214 |
457 ± 232 |
0.25 |
|
SF-36 score |
98 ± 7 |
98 ± 6 |
99 ± 8 |
0.25 |
|
Physical activity |
6.2 ± 1.8 |
6.7 ± 1.7 |
5.8 ± 1.8 |
0.01 |
|
Time between scans, years |
1.95 ± 0.21 |
1.94 ± 0.19 |
1.96 ± 0.23 |
0.58 |
|
OA gradeb |
||||
|
Grade of medial osteophytes |
||||
|
<2 |
107 |
50 |
57 |
0.50 |
|
≥ 2 |
18 |
7 |
11 |
0.35 |
|
Grade of medial JSN |
||||
|
<2 |
90 |
35 |
55 |
0.04 |
|
≥ 2 |
35 |
22 |
13 |
0.13 |
|
Grade of lateral osteophytes |
||||
|
<2 |
103 |
48 |
55 |
0.49 |
|
≥ 2 |
22 |
9 |
13 |
0.39 |
|
Grade of lateral JSN |
||||
|
<2 |
116 |
55 |
61 |
0.58 |
|
≥ 2 |
9 |
2 |
7 |
0.10 |
|
Tibial plateau area, mm2 |
||||
|
Medial |
2054.6 ± 363.9 |
2331.1 ± 304.3 |
1860.2 ± 263.2 |
<0.001 |
|
Lateral |
1407.2 ± 256.7 |
1533.4 ± 244.9 |
1328.2 ± 232.8 |
<0.001 |
|
|
||||
|
Except where indicated otherwise, values are means ± standard deviations. aMen vs women, by independent t-tests or chi-square test, as appropriate. bValues are the number of subjects in each grade category. One radiograph was lost after the study commenced. BMI, body mass index; JSN, joint-space narrowing.; MRI, magnetic resonance imaging; OA, osteoarthritis; SF-36, 36-Item Short-Form Health Survey; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index. |
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|
Wang et al. Arthritis Research & Therapy 2005 7:R687 doi:10.1186/ar1726 |
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