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This is an observational - non interventional study. The investigators will compare IgG4 levels of 80 healthy donors (from Israel blood bank - MDA) and 80 Systemic Sclerosis patients from Meir Medical Center.
IgG4 levels will be obtained from medical records of 80 SSc patients between the years 2000-2019. These will be compared to IgG4 levels from sera of 80 healthy donors (from Israel blood-bank - MDA). Correlations between IgG4 levels and the following will be made: age, sex, disease type (limited or diffused SSc), disease duration, medications.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| SSc | 74 SSc patients aged 18 - 85 |
| |
| Healthy controls | 80 Healthy blood-donors aged 18 - 85 |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| IgG4 measurement (non-interventional, just obtaining data from medical records) | Diagnostic Test | IgG4 measurement in mg/dL |
|
| Measure | Description | Time Frame |
|---|---|---|
| IgG4 measurement | quantifying IgG4 in each group and in SSc subgroups based on disease type, organs involved, medications. | 4 months |
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Inclusion Criteria:
Exclusion Criteria:
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Medical records of SSc patients from Meir Medical Center
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Meir Medical Center | Kfar Saba | Israel |
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| ID | Term |
|---|---|
| D012595 | Scleroderma, Systemic |
| ID | Term |
|---|---|
| D003240 | Connective Tissue Diseases |
| D017437 | Skin and Connective Tissue Diseases |
| D012871 | Skin Diseases |
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sera from healthy participants purchased from MDA will be used as control.