Table 1

Sample characteristics

Total sample (n = 2,092)*

Subset with all radiographs (n = 1,373)

Mean (SD) or n (%)

Mean (SD) or %


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)


*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.

Nelson et al. Arthritis Research & Therapy 2011 13:R176   doi:10.1186/ar3501

Open Data