Finland is divided into 16 regional districts, inter-municipal associations, which offer among other things public medical services for intellectually disabled people. A district centre includes an out-patient clinic, rehabilitation unit, psychiatric and neurological departments.  In general the customers have been satisfied with the special services. However, the system is considered expensive and division into inter-municipal associations may be history in near future. 

In our country a child or adult neurologist, child, youth or adult psychiatrist or pediatrician may achieve special competence in intellectual disability medicine after working three years in public services and passing the examination held by a board of examiners. The number of specialists in the field of intellectual disability medicine is about 60.  

The Finnish Society of Intellectual Disability Medicine has 120 members and was founded in 1982. The society organises two annual congresses.

Maria Arvio

Aetiology of intellectual disability – The Finnish classification: development of a method to incorporate WHO ICD-10 coding

M: Wilska & M.Kaski, Journal of Intellectual Disability Research 1999;43:242-2

This article describes the Finnish classification  created twenty years ago after which it has been actively used by physicians working in the field. There has been a need to have a systematic and practical method to assess the aetiology, to reach the most important goal in the  work of  physicians.

The classification is based on timing and type of the injury to CNS. The main divisions are: 1. Genetic causes, 2.CNS malformations and multiple malformation syndromes of unknown origin, 3.External prenatal factors, 4. Paranatally acquired disorders, (-1 to + 4 wks from delivery). 5. Postnatally acquired disorders, 6. Untraceable or unclassified causes. These divisions are divided into groups and subgroups.  In the classification , the earliest CNS injuring factor is the primary diagnosis. Later factors disturbing the functioning of the individual must be added as secondary causes.

The parents’ most important question concerning  inheritance, can be answered after a rather simple first stage  workup. This is because  at least the timing of the injury  can be determined with  detailed history, careful physical examination with mapping of malformations, and rather simple laboratory studies alone. These should include chromosomal studies if the patient has dysmorphic features. FraX-DNA is indicated at least if no other causes for ID is found.    For specific  diagnosis, more detailed metabolic and DNA-examinations are sometimes needed, as secondary stage assessment. Knowledge of the aetiology also benefits the child many ways and is helpful for all those involved with the patient, and even  the society.

When the ICD-10 diagnostic coding was published in Finnish,  it was decided to reorganize the appropriate diagnoses to ease the work of physicians who had been accustomed to think in the timed sequence. The list of diagnoses  has been published. While doing this, an image of  a tree with large root network and multiply branched limbs became evident. When causative diagnoses were placed at the correct locations, they appeared as root nodules or leaves on the tips of the branches. This illustration has proven to be valuable in teaching as well as in family counselling.

 

Prevalence, aetiology and comorbidity of severe and profound intellectual disability in Finland.  

Arvio M & Sillanpää M, J Intellect Disabil Res 2003:47:108-12

BACKGROUND: The aim of the present study was to describe the aetiology, associated impairments and prevalence of severe and profound intellectual disability (SPID) in Finland. METHODS: The number of people with SPID in the catchment area of the Paajarvi Centre for the Mentally Retarded, Lammi, Finland, (total population = 341,227) was calculated from the client register of this centre. Aetiological factors and background diagnoses for all subjects with SPID were analysed retrospectively. RESULTS: The number of people with SPID was 461, giving a prevalence of 0.13%. The aetiology of their SPID was genetic or congenital in 235 (50.9%) individuals, acquired in 89 (19.3%), genetic and/or acquired in 84 (18.3%), and unknown in 53 (11.5%) subjects. Out of the 53 individuals with an SPID of unknown origin, 48 (90.6%) had an associated impairment; the remaining five were the only members of the study group showing normal growth, and having neither dysmorphic features, physical abnormalities nor family members with ID. Out of the 461 subjects, 422 (91.5%) had between one and six associated impairments (total = 954), and the remaining 39 (8.5%) had SPID as their only impairment. Uncomplicated SPID was mainly of genetic or congenital origin, whereas all subjects with acquired encephalopathy had multiple disabilities. Speech defects, epilepsy and cerebral palsy were the most common associated impairments. CONCLUSIONS: Severe and profound ID almost always occurs concomitantly with other severe neurological or psychiatric impairments. The proportion of people with SPID described in the present study is similar to that found in Finland in 1966. The aetiology of SPID in the vast majority of cases is biopathological.

 

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