autoimmune thrombocytopenic purpura: An autoimmune disorder in which the number of circulating platelets is reduced due to their antibody-mediated destruction. ITP is a diagnosis of exclusion and is heterogeneous in origin.
Endpoint definition
↥
						Endpoint definition steps | 
					
						FinnGen | 
				
|---|---|
						Phenotype data | 
					429209 | 
								1. Apply sex-specific ruleNone  | 
							429209 | 
								2. Check conditionsNone  | 
							429209 | 
								3. Check pre-conditions, main-only, mode, registry filtersRegistry filters: 
 2 out of 7 registries used, show all original rules.  | 
							
								 912  | 
						
								4. Check minimum number of eventsNone  | 
							912 | 
								5. Include endpointsNone  | 
							912 | 
										6. Filter based on genotype QC (FinnGen only) | 
									882 | 
Control definitions (FinnGen only)
					Control exclude
					D3_COAGDEF_PURPUR_HAEMORRHAGIC
				
			Extra metadata
					Level in the ICD hierarchy
					4
				
				
					First used in FinnGen datafreeze
					DF2
				
				
					Parent code in ICD-10
					D69
				
				
					Name in latin
					Purpura idiopathica thrombocytopenica
				
			Similar endpoints
↥List of similar endpoints to
		
Idiopathic thrombocytopenic purpura
	based on the number of shared cases.
		
		Broader endpoints:
	
- Purpura and other haemorrhagic conditions
 - Coagulation defects, purpura and other haemorrhagic conditions
 - Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
 - Autoimmune diseases
 - Used for control exclusion in common control thyroid runs
 
		
		Narrower endpoints:
	
None
Case counts by codes
↥Summary Statistics
↥-FinRegistry-
Key figures
| All | Female | Male | |
|---|---|---|---|
| Number of individuals | |||
| Whole population | 9562 | 4823 | 4657 | 
| Only index persons | 8094 | 4155 | 3939 | 
| Unadjusted period prevalence (%) | |||
| Whole population | 0.13 | 0.14 | 0.13 | 
| Only index persons | 0.15 | 0.15 | 0.15 | 
| Median age at first event (years) | |||
| Whole population | 50.61 | 48.79 | 52.21 | 
| Only index persons | 47.50 | 45.05 | 50.09 | 
-FinnGen-
Key figures
| All | Female | Male | |
|---|---|---|---|
| Number of individuals | 882 | 461 | 421 | 
| Unadjusted period prevalence (%) | 0.22 | 0.20 | 0.23 | 
| Median age at first event (years) | 49.96 | 40.60 | 60.20 | 
-FinRegistry-
Age distribution of first events
-FinnGen-
Age distribution of first events
-FinRegistry-
Year distribution of first events
-FinnGen-
Year distribution of first events
-FinRegistry-
Cumulative Incidence Function
-FinnGen-
Cumulative Incidence Function
Mortality – FinRegistry
↥Relationships between endpoints
↥Index endpoint: D3_ITP – Idiopathic thrombocytopenic purpura
GWS hits: 1
                
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