Atopic dermatitis


atopic eczema: A chronic inflammatory genetically determined disease of the skin marked by increased ability to form reagin (IgE), with increased susceptibility to allergic rhinitis and asthma, and hereditary disposition to a lowered threshold for pruritus. It is manifested by lichenification, excoriation, and crusting, mainly on the flexural surfaces of the elbow and knee. In infants it is known as infantile eczema.

Endpoint definition

FinnGen phenotype data

429209 individuals

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Apply sex-specific rule None


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Check conditions None


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Check pre-conditions, main-only, mode, registry filters

Hospital Discharge: ICD-10 L20
Hospital discharge: ICD-9 6918
Hospital discharge: ICD-8 691
Hospital discharge: excluded ICD-9 6918X
Cause of death: ICD-10 L20
Cause of death: ICD-9 6918
Cause of death: ICD-8 691
Cause of death: excluded ICD-9 6918X
KELA reimbursements: KELA codes ANY
KELA reimbursements: ICD-10 L20

3 out of 7 registries used, show all original rules.


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Check minimum number of events None


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Include endpoints None


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Remove individuals based on genotype QC


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Control definitions

Control exclude L12_DERMATITISECZEMA

Extra metadata

Level in the ICD hierarchy 3
First used in FinnGen datafreeze DF2
Parent code in ICD-10 L20-L30
Name in latin Dermatitis atopica

Summary Statistics

Key figures

All Female Male
Number of individuals 15208 10846 4362
Unadjusted prevalence (%) 3.69 4.71 2.40
Mean age at first event (years) 29.92 30.13 29.38


Follow-up Absolute risk HR [95% CI] p N
1998–2019 0.04 1.91 [1.46, 2.50] 2.3e-6 474
15 years 0.01 1.29 [1.00, 1.67] 5.1e-2 189
5 years 0.00 2.16 [1.62, 2.87] 1.2e-7 91
1 year 0.00 4.43 [3.00, 6.53] 6.1e-14 35

Age distribution of first events

Year distribution of first events

Cumulative Incidence


Index endpoint: L12_ATOPIC – Atopic dermatitis
GWS hits: 67

Survival analyses between endpoints


before Atopic dermatitis
after Atopic dermatitis

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Drugs most likely to be purchased after Atopic dermatitis