Database of patients with sarcoidosis of the Republic of Tatarstan: a retrospective analysis for 50 years

Background: Sarcoidosis is a granulomatous disease with no established etiology. The prevalence of sarcoidosis is growing, there are changes in the clinic of the disease depending on geolocation and the environment.Aim: To analyze the database (register) of sarcoidosis patients registered with this disease in the Republic of Tatarstan.Materials and methods: In Tatarstan, an electronic database of 2715 patients with sarcoidosis has been created, collected over the past 50 years. The frequencies of the phenomena were estimated, and the ChI-square Pearson criterion was calculated to assess the relationship of events and their reliability.Results: There were 69.2% of women and 30.8% of men. The average age was 44.2 years (15 to 87 years, median 44 years). Men were younger (median 36 years old) than women (median 48 years old). Most often, there was stage II (47.8%) and stage I (40.8%). Lofgren's syndrome was in 13% of patients. 42% had biopsy data, over three decades its frequency increased -21.9%, 34.8% and 49.0%, respectively. After 2010, there was an increase in stage II sarcoidosis, over the past 20 years, the proportion of women has decreased and the proportion of men has grown. Adverse factors of the profession orthe environment were in every third patient. The frequency of prescribing prednisone decreased from 2013 to 2019 from 23.1% to 9.1%, and pentoxifylline increased from 14.9% in 2011 to 58% in 2019. Every third patient received vitamin E.Conclusion: About 100 new patients were identified annually. An increase in the II radiation stage of sarcoidosis was noted. A biopsy was performed only on every second patient. The treatment was consistent with the international approach - to use prednisone and cytostatics only with the progression of the process