Multicenter, Observational, Descriptive Study of the Diagnosis, Course and Treatment of Patients With SLE in Routine Practice in Kazakhstan: a Registry Study With Retrospective and Prospective Components.

Multicenter, observational, descriptive study of the diagnosis, course and treatment of patients with SLE in routine practice in Kazakhstan: a registry study with retrospective and prospective components.

Primary Endpoints

1. Proportion of patients with varying SLE activity assessed by the SLEDAI 2K Activity Index at visits 0, 1, and 2
2. Proportion of patients with PGA changes in dynamics
3. Proportion of patients with changes in dynamics in general clinical tests from baseline data (Visit 0) at visits 1 and 2
4. Proportion of patients with varying SLE organ damage assessed by SLICC/ACR Damage Index - SLICC/ACR DI - SDI at visits 0, 1, and 2;
5. Proportion of patients with prescribed average daily dose of oral corticosteroids at visits 0, 1 and 2

   * Prednisone (and equivalents) = 0 mg/day
   * Patients with corticosteroids \>0 mg/day; mean daily dose of oral corticosteroids
   * Patients with corticosteroids \>5 mg/day: mean daily dose of oral corticosteroids
   * Patients with corticosteroids ≤5 mg/day: mean daily dose of oral corticosteroids
6. Proportion of patients treated with each line of treatment \[13\] at visits 0, 1, and 2

   * Glucocorticoids;
   * Cytostatics;
   * NSAIDs;
   * Biological drugs;
   * Immunoglobulins;
   * Other significant drugs that affect the course of treatment.

Secondary Endpoints :

1. Proportion of each gendersex among patients with SLE 2. Proportion of patients in different age groups 3. Proportion of patients of different races 4. Proportion of patients belonging to different nationalities 5. Proportion of patients with different social status groups 6. Proportion of patients in different BMI classes \[9\] 7. Proportion of patients with different ages of SLE onset and disease duration at diagnosis

* SLE course (relapsing-remitting, chronically active course; SLE remission)
* SLE disease activity (high, moderate, low)
* Average number of SLE exacerbations in the past year;
* Number and reasons for SLE-related hospitalizations and emergency department visits \[11\]
* Number and reasons for non-SLE-related hospitalizations;
* Number and percentage of patients with affected organs (kidneys, lungs, heart, nervous system, hematopoietic system, skin \[10\])
* Changes in the Revised Cutaneous Lupus Erythematosus Disease Areas and Severity Index (R-CLASI) scores 8 Changes in the condition of patients with SLE:
* proportion of patients who achieved remission;
* proportion of patients with a decrease in the degree of SLE activity;
* proportion of patients who achieved low disease activity;
* proportion of patients with various reasons for stopping therapy
* proportion of patients switching drugs 9. Changes in quality of life indicators based on quality of life questionnaires and the presence of fatigue: Questionnaire (LupusQoL) for SLE at visits 0, 1 and 2.

  10. Proportion of patients achieving the combined endpoint LLDAS7.5 at baseline, visits 0, 1, and 2 (LLDAS with prednisone equivalent needed for response ≤ 7.5 mg/day) 11. Proportion of patients achieving the combined endpoint LLDAS5 at baseline, visits 0, 1, and 2 (LLDAS with prednisone equivalent needed for response ≤ 5 mg/day) 12. Proportion of patients achieving clinical remission at baseline, visits 0, 1, and 2.

  13. Changes in symptoms and clinical manifestations in patients with SLE 14. Changes in complications in patients with SLE 15. Proportion of patients with lupus nephritis 16. Changes in non-specific laboratory parameters (at visits 1 and 2 from the initial (visit 0)):
  * Complete blood count (CBC);
  * Complete urine count (CUA);
  * Coagulogram;
  * biochemical blood test: creatinine, total protein, ALT, AST, total bilirubin, total cholesterol, glucose;
  * CRP
  * GFR 17. Changes in immunological criteria:
* Anti-dsDNA at visits 0.1 and 2;
* Indicators of C3, C4 components of the complement system at visits 0.1 and 2;
* IgG antibodies to double-stranded (native) DNA at visits 0, 1 and 2
* Antinuclear factor on the HEp-2 cell line (ANF) at visits 0 and 2 18. The proportion of patients adherent to treatment based on the Morisky-Green Questionnaire 19. The proportion of patients who had hospitalization and/or an emergency department visit \[11\] 20. The percentage of various reasons for SLE and non-SLE hospitalizations

Eligibility Criteria:
Inclusion Criteria

* Men and women aged 18 years and older with a verified diagnosis of SLE
* Patient signed and dated written informed consent form (ICF) by ICH GCP and local legislation prior to inclusion in the study for the prospective observational group.

Exclusion Criteria

* Absence of a signed consent form (ICF) in patients
* Cognitive impairments that hinder understanding the study objectives and completing questionnaires
* Participation in any randomized controlled clinical trial within 3 months prior to inclusion or during participation in this study.