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. 2020 Jun 25;6(2):e001265. doi: 10.1136/rmdopen-2020-001265

Table 4.

Clinical examination features and their association with hand OA and discriminatory capacity

OR (95% CI) AUC (95% CI)*
Number of joints with bony enlargement:

  • DIP joints

 1.33 (1.18–1.51) 0.71 (0.64–0.78)

  • PIP joints

 1.22 (1.08–1.38) 0.64 (0.56–0.72)

  • MCP joints

 1.02 (0.71–1.48) 0.51 (0.42–0.59)

  • Thumb base joints

 1.96 (1.20–3.19) 0.59 (0.51–0.67)
Number of joints with pain on pressure:

  • DIP joints

 1.24 (1.08–1.43) 0.64 (0.56–0.72)

  • PIP joints

 1.02 (0.92–1.12) 0.53 (0.44–0.61)

  • MCP joints

 0.81 (0.71–0.93) 0.62 (0.54–0.70)

  • Thumb base joints

 1.51 (1.03–2.22) 0.59 (0.50–0.67)
Number of joints with soft tissue swelling:

  • DIP joints

 1.17 (0.91–1.52) 0.55 (0.47–0.63)

  • PIP joints

 1.00 (0.86–1.17) 0.53 (0.45–0.61)

  • MCP joints

 0.48 (0.32–0.73) 0.66 (0.57–0.74)

  • Thumb base joints

 0.83 (0.32–2.16) 0.51 (0.42–0.59)
Number of joints with malalignment:

  • DIP joints

 4.09 (1.88–8.87) 0.68 (0.60–0.75)

  • PIP joints

 1.75 (1.01–3.04) 0.57 (0.48–0.65)

  • Thumb base joints

 3.28 (1.00–10.72) 0.55 (0.47–0.63)
Pain on palpation in wrist(s) 0.42 (0.22–0.82) 0.58 (0.50–0.67)

*Interpretation of AUC values: 0.50–0.59 = no discrimination, 0.60–0.69 = poor discrimination, 0.70–0.79 = acceptable discrimination, and ≥0.80 = excellent discrimination.

AUC, area under receiver operating curves; DIP, distal interphalangeal; MCP, metacarpophalangeal; OA, osteoarthritis; PIP, proximal interphalangeal.