Number of breaks in each group when different sizes for defining a cortical beak were applied
| Size of cortical break | HC | Early RA | Late RA | p-value* |
|---|---|---|---|---|
| (n=13 joints) | (n=24 joints) | (n=24 joints) | ||
| >0.50 mm | 66, (2, [0–8])# | 154, (5, [0–27]) | 281 (6.5, [0–38])# | 0.02 |
| >0.66 mm | 17, (1, [0–3]) | 58, (1.5, [0–16]) | 106, (1.5, [0–18]) | 0.15 |
| >0.82 mm | 4, (0, [0–1])# | 16, (0, [0–4]) | 74 (1, [0-16])# | 0.04 |
Total number of breaks, (median, [range]) per joint.
↵* P-value for comparison across the 3 groups (Kruskal-Wallis). #Significant difference between different groups (Mann-Whitney, p<0.05). HC = healthy control; RA = rheumatoid arthritis.