Table 1

Criteria for overall hand OA with the mean weight assigned to each criterion (bolded numbers) and the categories within each criterion

Criteria and categoriesMean weight 1*Mean weight 2*
Age
Below 45 years00
45–54 years5.98.1
55–64 years9.513.0
65 years and above13.318.3
Duration of symptoms in DIPs, PIPs, IP1 and thumb base joints
Less than 6 weeks0
6 weeks or longer7.7
Duration or morning stiffness in DIPs, PIPs, IP1 and thumb base joints
Long (more than 30 min)00
None5.67.7
Short (30 min or less)10.714.7
Duration of stiffness after inactivity in DIPs, PIPs, IP1 and thumb base joints
Long (more than 5 min)0
None2.5
Short (5 min or less)7.4
Number of DIPs, PIPs, IP1 and CMC1 joints with osteophytes
None00
1–2 joint(s)9.012.4
3–5 joints15.921.8
6 or more joints20.428.0
Number of DIPs, PIPs, IP1 and CMC1 joints with joint space narrowing
None00
1–2 joint(s)6.89.3
3–5 joints11.015.1
6 or more joints14.820.3
Radiographic OA (osteophytes or joint space narrowing) in at least 50% of the joints (DIPs, PIPs, IP1 and CMC1), in which the person has experienced pain, aching or stiffness on most days in the previous 6 weeks
No00
Yes13.618.7
Inflammatory biomarkers
Elevated CRP and ESR0
Elevated CRP or ESR3.4
Normal CRP and ESR12.2
  • *Weight 1: initial weights for the 8 criteria tested in the 1000minds survey.

  • †Weight 2: weights for the 5 criteria after removal of 3 criteria. The sum of the weights for each criterion’s most extreme category (bolded weights) across the criteria gives a total score of 100.

  • CMC1, first carpometacarpal; CRP, C reactive protein; DIP, distal interphalangeal; ESR, erythrocyte sedimentation rate; IP1, first interphalangeal; OA, osteoarthritis; PIP, proximal interphalangeal.