Pityriasis rosea

L12_PITYROCHEA

pityriasis rosea: a skin rash. It is benign but may inflict substantial discomfort in certain cases.Classically, it begins with a single "herald patch" lesion, followed in 1 or 2 weeks by a generalized body rash lasting up to 12 weeks, however usually around 6 - 8.

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Endpoint definition

Endpoint definition steps

FinnGen

Phenotype data

520210

1. Apply sex-specific rule

None

520210

2. Check conditions

None

520210

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

Registry filters:

  • Hospital discharge: ICD-10 L42
  • Hospital discharge: ICD-9 6963
  • Hospital discharge: ICD-8 6963
  • Cause of death: ICD-10 L42
  • Cause of death: ICD-9 6963
  • Cause of death: ICD-8 6963

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

284

4. Check minimum number of events

None

284

5. Include endpoints

None

284

6. Filter based on genotype QC (FinnGen only)

284

Control definitions (FinnGen only)

Control exclude
L12_PAPULOSQUAMOUS

Extra metadata

Level in the ICD hierarchy
4
First used in FinnGen datafreeze
DF2
Parent code in ICD-10
L40-L45
Name in latin
Pityriasis rosea

Case counts by codes

FinnGen case counts by registry codes:

generic upset plot

Upset plot

Full data table

Summary Statistics

-FinRegistry-

Key figures

All Female Male
Number of individuals
Whole population 2464 1398 1053
Only index persons 2221 1287 934
Unadjusted period prevalence (%)
Whole population 0.04 0.04 0.03
Only index persons 0.04 0.05 0.04
Median age at first event (years)
Whole population 25.89 28.71 22.08
Only index persons 25.96 28.92 21.89

-FinnGen-

Key figures

All Female Male
Number of individuals 284 204 80
Unadjusted period prevalence (%) 0.06 0.07 0.04
Median age at first event (years) 32.40 31.72 34.15

-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

No data

CodeWAS (R11)

CodeWAS is a tool for exploring the associations between an endpoint and all of the medical codes and drug codes.

This is a new tool, please reach out using the contact form for feedback and improvement ideas.

First, a cohort is built by matching controls to the endpoint cases using year of birth and sex. Then, a Fisher test is done for all the medical codes and drug codes between the cases and controls of this cohort. Codes are reported in the table below if they have −log10(p-value) ≥ 6.

Matched cohort

Matched cases
255
Matched controls
2548
Code
Vocabulary
Description
Odds Ratio
-log10(p)
N matched cases
N matched controls
L42
ICD-10 Finland
Pityriasis rosea
1795.9
276.5
221
9
69630
ICD-8 Finland
Psoriasis and similar disorders, Pityriasis rosea
+∞
28.7
27
*
TQX10
NOMESCO Finland
Biopsy of skin and subcutaneous tissue
5.5
14.7
45
95
D07AC01
ATC
betamethasone; topical
2.8
12.2
101
482
L30.9
ICD-10 Finland
Dermatitis, unspecified
3.0
8.8
54
209
E0000UV
ATC
NA
2.2
8.4
115
687
Z01.5
ICD-10 Finland
Diagnostic skin and sensitization tests
3.3
7.8
39
131
R21
ICD-10 Finland
Rash and other nonspecific skin eruption
5.1
7.5
23
49
6963A
ICD-9 Finland
Psoriasis and similar disorders, Pityriasis rosea
+∞
7.3
7
*
D07AB08
ATC
desonide; topical
3.2
6.9
38
134
D07BB04
ATC
hydrocortisone butyrate and antiseptics; topical
2.9
6.8
42
163
L43.8
ICD-10 Finland
Other lichen planus
+∞
6.3
6
*
L40.0
ICD-10 Finland
Psoriasis vulgaris
12.9
6.1
10
8
H02AB06
ATC
prednisolone; systemic
2.0
6.1
115
755

Mortality – FinRegistry

Association

Association between endpoint L12_PITYROCHEA and mortality.

Females

Parameter HR [95% CI] p-value
L12_PITYROCHEA 1.391 [0.95, 2.03] 0.087
Birth year 0.995 [0.99, 1.0] 0.267

During the follow-up period (1.1.1998 — 31.12.2019), 58 out of 1019 females with L12_PITYROCHEA died.

Males

Parameter HR [95% CI] p-value
L12_PITYROCHEA 1.467 [1.09, 1.98] 0.013
Birth year 0.985 [0.97, 1.0] 0.012

During the follow-up period (1.1.1998 — 31.12.2019), 67 out of 650 males with L12_PITYROCHEA died.

Mortality risk

Mortality risk for people of age

years, who have L12_PITYROCHEA.

N-year risk Females Males
1 0.126% 0.239%
5 0.803% 1.615%
10 1.998% 3.935%
15 3.847% 7.278%
20 6.646% 12.309%

Relationships between endpoints

Index endpoint: L12_PITYROCHEA – Pityriasis rosea

GWS hits: -

Endpoint
Case Overlap
Survival Analysis
Genetic Correlations
Genetic Signals
N (Jaccard index)
HR [CI]
Extremity
rg [CI]
Extremity
Hits
Coloc Hits
FinRegistry
FinnGen
FinRegistry
FinnGen
FinnGen
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