Fig. 1

Plot showing the study timeline and osteitis development from baseline to end of follow-up. a Timeline plot. Timepoint zero was defined as the year of diagnosis. Median differences between the year of diagnosis and the time of the baseline and the last CT are shown as diamond-shaped points, and the interquartile ranges are shown as horizontal error bars. The mean study observation period with error bars of 2 standard deviations is shown at the bottom. b Groups of the study. At baseline, there were two groups. Three different osteitis trajectories ended in three different outcome groups. The connection lines show how the patients changed groups during the study observation period