Mental retardation

Description

mental retardation: ['Subnormal intellectual functioning which originates during the developmental period. This has multiple potential etiologies, including genetic defects and perinatal insults. Intelligence quotient (IQ) scores are commonly used to determine whether an individual is mentally retarded. IQ scores between 70 and 79 are in the borderline mentally retarded range. Scores below 67 are in the retarded range. (Joynt, Clinical Neurology, 1992, Ch55, p28)']

Data source
FinnGen phenocode KRA_PSY_MENTALRET
Hospital Discharge registry ICD-8: 31[1-5]
Cause of Death registry ICD-8: 31[1-5]
First defined in version DF2
Ontology
DOID 1059
GWAS catalog 0003847

Key figures

Sex All Female Male
Number of individuals 389 182 207
Unadjusted prevalence (%) 0.29 0.24 0.36
Mean age at first event (years) 31.51 31.65 31.38
Median number of events / individual 2 2 2

Clinical metrics

Sex All Female Male
Recurrence within 6 months (%) 40.36 41.21 39.61
Case fatality at 5-years (%) 3.86 2.2 5.31

Associations