Figure 1.

Flow diagram of the data collection and analyses. Information on 114 sarcoidosis patients and 24 healthy controls was collected. Twenty-six of the sarcoidosis patients who had been followed-up for more than 6 months and were tested IL-35 levels again after 6 months were selected to study the relationship between IL-35 levels and the prognosis of sarcoidosis patients, including 6 in the progressive group, 4 in the stable group and 16 in the improved group. The remaining 88 patients were lost to follow-up or refused to provide blood samples 6 months after the first visit.