Table 1 |
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|
Sample characteristics |
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|
Total sample (n = 2,092)* |
Subset with all radiographs (n = 1,373) |
|
|
Mean (SD) or n (%) |
Mean (SD) or % |
|
|
|
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|
Age (years) |
65.1 (10.9) |
67.3 (9.7) |
|
BMI (kg/m2) |
31.3 (7.1) |
30.8 (6.4) |
|
Male |
695 (33.2) |
472 (34.4) |
|
African American |
709 (33.9) |
438 (31.9) |
|
DIP OA† |
902 (43.2) |
637 (46.4) |
|
PIP OA |
595 (28.5) |
419 (30.5) |
|
MCP OA |
195 (9.4) |
132 (9.6) |
|
CMC1 OA |
577 (27.7) |
416 (30.3) |
|
TFJ OA |
822 (39.8) |
554 (40.4) |
|
PFJ Ost > = 2 |
174 (11.8) |
142 (10.3) |
|
Hip OA |
643 (33.8) |
475 (34.9)§ |
|
LS OA‡ |
1,138 (59.2) |
836 (60.9) |
|
|
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|
*For total sample (at least one radiograph, see Figure), For LS OA n = 1,923; 2,068 for TFJ OA; 1,901 for Hip OA; 1,481 for PFJ Ost; 2,088 for DIP and PIP OA; 2,086 for MCP and CMC OA †Where OA is defined as KL grade > = 2 at any DIP, PIP, CMC, MCP, TFJ, or hip joint ‡Defined as having at least one lumbar level (L1/2 to L5/S1) with both ost and DN OARSI grade > = 1 §Hip OA n = 1,360 BMI, body mass index; CMC, carpometacarpal joint; DIP, distal interphalangeal joint; LS, lumbosacral spine; MCP, metacarpophalangeal joint; OA, osteoarthritis; OST, osteophytes; PFJ, patellofemoral joint; PIP, proximal interphalangeal joint; SD, standard deviation; TFJ, tibiofemoral joint. |
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Nelson et al. Arthritis Research & Therapy 2011 13:R176 doi:10.1186/ar3501 |
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