ICD-10 Insomnia Due to Dementia: Understanding the Diagnosis

Insomnia due to dementia, a condition that affects millions of people worldwide, has been studied extensively using different diagnostic criteria. In recent years, researchers have focused on comparing the International Classification of Diseases 10th Revision (ICD-10) with the Diagnostic and Statistical Manual of Mental Disorders 3rd Edition Revised (DSM-III-R) for diagnosing dementia-related insomnia.

A study published in highlights the differences between ICD-10 and DSM-III-R diagnoses of dementia. The researchers found that while both systems agree on the prevalence of dementia with age, they differ significantly in their diagnostic criteria. Specifically, the ICD-10-CM version G31.0, which became effective October 1, 2023, is more conservative than DSM-III-R in diagnosing dementia.

The study analyzed the various components required for a diagnosis of dementia and found that the prevalence of all types increased with age. For example, adjustment insomnia (insomnia temporally related to another medical condition) was more prevalent among older individuals. The researchers also noted that cognitive assessment components were correlated with education levels, but other components did not show a similar correlation.

The study used the Canberra Interview for the Elderly administered by lay interviewers to identify cases of dementia in community and institutional settings. A community survey of 1045 persons aged 70 years and over was conducted in the cities of Canberra and Queanbeyan to identify cases of dementia.

The findings suggest that while both ICD-10 and DSM-III-R criteria are used to diagnose dementia, they may not always agree on the diagnosis. The study highlights the need for further research into the differences between these two diagnostic systems, particularly in relation to insomnia due to dementia. By understanding the nuances of each system, healthcare professionals can better diagnose and manage this condition.

Icd 10 insomnia due to dementia