Criteria and categories | Mean weight 1* | Mean weight 2* |
Age | ||
Below 45 years | 0 | 0 |
45–54 years | 5.9 | 8.1 |
55–64 years | 9.5 | 13.0 |
65 years and above | 13.3 | 18.3 |
Duration of symptoms in DIPs, PIPs, IP1 and thumb base joints | ||
Less than 6 weeks | 0 | – |
6 weeks or longer | 7.7 | |
Duration or morning stiffness in DIPs, PIPs, IP1 and thumb base joints | ||
Long (more than 30 min) | 0 | 0 |
None | 5.6 | 7.7 |
Short (30 min or less) | 10.7 | 14.7 |
Duration of stiffness after inactivity in DIPs, PIPs, IP1 and thumb base joints | ||
Long (more than 5 min) | 0 | – |
None | 2.5 | |
Short (5 min or less) | 7.4 | |
Number of DIPs, PIPs, IP1 and CMC1 joints with osteophytes | ||
None | 0 | 0 |
1–2 joint(s) | 9.0 | 12.4 |
3–5 joints | 15.9 | 21.8 |
6 or more joints | 20.4 | 28.0 |
Number of DIPs, PIPs, IP1 and CMC1 joints with joint space narrowing | ||
None | 0 | 0 |
1–2 joint(s) | 6.8 | 9.3 |
3–5 joints | 11.0 | 15.1 |
6 or more joints | 14.8 | 20.3 |
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 | ||
No | 0 | 0 |
Yes | 13.6 | 18.7 |
Inflammatory biomarkers | ||
Elevated CRP and ESR | 0 | – |
Elevated CRP or ESR | 3.4 | |
Normal CRP and ESR | 12.2 |
*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.