Other overlap syndromes

M13_OVERLAP

mixed connective tissue disease: Mixed connective tissue disease (MCTD) is a rare autoimmune disorder that is characterized by features commonly seen in three different connective tissue disorders: systemic lupus erythematosus , scleroderma , and polymyositis . Some affected people may also have symptoms of rheumatoid arthritis . Although MCTD can affect people of all ages, it appears to be most common in women under age 30. Signs and symptoms vary but may include Raynaud's phenomenon ; arthritis; heart, lung and skin abnormalities; kidney disease; muscle weakness, and dysfunction of the esophagus. The cause of MCTD is currently unknown. There is no cure but certain medications such as nonsteroidal anti-inflammatory drugs (NSAIDs) , corticosteroids and immunosuppresivedrugsmay help manage the symptoms.

Endpoint definition

FinnGen phenotype data

356077 individuals

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Apply sex-specific rule None

356077

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Check conditions None

356077

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Filter registries

Hospital Discharge: ICD-10 M35.1
Hospital discharge: ICD-9 $!$
Hospital discharge: ICD-8 $!$
Cause of death: ICD-10 M35.1
Cause of death: ICD-9 $!$
Cause of death: ICD-8 $!$

454

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Check pre-conditions, main-only, mode, ICD version

Look only at ICD versions H.D: 10, 8, 9 ; C.O.D: 10, 8, 9

454

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Check minimum number of events None

454

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Include endpoints None

454

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M13_OVERLAP

Extra metadata

Level in the ICD hierarchy 4
First used in FinnGen datafreeze DF2
Parent code in ICD-10 M35
Name in latin Alia syndromata mixta

Summary Statistics

Key figures

All Female Male
Number of individuals 454 352 102
Unadjusted prevalence (%) 0.13 0.18 0.06
Mean age at first event (years) 51.77 49.91 58.21

Mortality

Follow-up Absolute risk HR [95% CI] p N
1998–2019 0.07 4.65 [2.22, 9.72] 4.5e-5 41
15 years 0.02 2.44 [1.27, 4.70] 7.5e-3 19
5 years 0.01 5.39 [2.74, 10.57] 9.9e-7 15
1 year - - - -

Age distribution of first events

Year distribution of first events

Cumulative Incidence

Correlations

Index endpoint: M13_OVERLAP – Other overlap syndromes
GWS hits: 1

Survival analyses between endpoints

Plot

before Other overlap syndromes
after Other overlap syndromes

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Drugs most likely to be purchased after Other overlap syndromes