Table 3

The agreement between osteophytes detected by ultrasound and CR, MRI as well as BE in finger joints from patients with HOA

ModalityOsteophyte gradeUltrasound osteophyte gradeTotalValidity of ultrasound
0123
MRI* n=8510862441215PEA 50.4%
PCA 96.1%
11271901094448Sensitivity 0.83
21172297171Specificity 0.75
31561597117
Total215235184217851
CR n=339501544559218552376PEA 57.3%
PCA 88.3%
137169208115529Sensitivity 0.96
241979211313Specificity 0.65
30418155177
Total15857515235363395
BE n=376301637484188642373PEA 76.6%
Sensitiv ity 0.90
11443383935151390Specificity 0.69
Total17818225815793763
  • * Interphalangeal joints of second to fifth finger in dominant hand.

  • Sensitivity and specificity of ultrasound with the reference being the comparative modality.

  • CMC1, MCP, (P)IP and DIP joints in both hands.

  • BE, bony enlargement; CR, conventional radiography; HOA, hand osteoarthritis PEA, percentage exact agreement; PCA, percentage close agreement.