Table 3

Pearson correlation coefficients between factors in the rotated four-factor solution

IP/CMC factor

MCP factor

Knee factor

Spine factor


IP/CMC factor*

1.0

MCP factor

0.44

1.0

Knee factor

0.30

0.36

1.0

Spine factor

0.24

0.30

0.40

1.0


*IP/CMC factor: Thumb IP, DIP 2-5, PIP 2-5, CMC1; MCP factor: MCP 2-5, Knee factor: TFJ and PFJ; Spine factor: Disc space narrowing and osteophytes L1/2 to L5/S1.

IP, interphalangeal joint; MCP, metacarpophalangeal joint; PFJ, patellofemoral joint; PIP, proximal interphalangeal joint; TFJ, tibiofemoral joint.

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

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