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. 2020 Feb 5;6(1):e001093. doi: 10.1136/rmdopen-2019-001093
Baseline
n (%) (n=145)
2 years
n (%) (n=129)
5 years
n (%) (n=145)
Positive change over 5 years
n (%)
Negative change over 5 years
n (%)
Net change
n (%)
Structural lesions (cut-offs)
≥3 erosions¶ 0 (0.0) 0 (0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0)
≥3 bone spurs¶ 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0)
≥3 fatty lesions¶ 1 (0.7) 2 (1.6) 2 (1.4) 1 (0.7) 0 (0.0) 1 (0.7)
≥5 fatty lesions¶ 2 (1.4) 1 (0.8) 1 (0.7) 0 (0.0) 1 (0.7) −1 (−0.7)
≥5 fatty lesions and/or erosions¶ 2 (1.4) 1 (0.8) 1 (0.7) 0 (0.0) 1 (0.7) −1 (−0.7)

*Paired samples t-test comparing baseline versus 5 years.

†Mean of three readers.

‡Missing data from at least one time point and one reader for four cases.

§Fatty lesions, erosions, bone spurs and ankylosis.

¶Agreement of ≥2 out of 3 readers.

ASAS, Assessment of Spondyloarthritis International Society; BME, bone marrow oedema; SPARCC, Spondyloarthritis Research Consortium of Canada.