Kim et al developed the Korea Dementia Comorbidity Index (KDCI) whcih can help to identify a patient at risk for developing dementia. The authors are from Dankook University, Eulji University, and Ajou University in the Republic of Korea.
Diagnoses were classed as the primary diagnosis and comorbid conditions. Comorbid conditions were coded using ICD-10.
Number of ICD10 groups: 18
ICD10
Comorbid Condition
Points
F00-F09
organic including symptomatic mental disorders
4
F30-F39
mood (affective) disorders
3
F40-F48
neurotic, stress-related and somatoform disorders
2
F50-F59
behavioral syndromes associated with physiological disturbances and physical factors
3
G20-G26
extrapyramidal and movement disorders
4
G40-G47
episodic and paroxysmal disorders
2
G50-G59
nerve, nerve root and plexus disorders
2
H00-H06
disorders of eyelid, lacrimal system and orbit
1
H30-H36
disorders of choroid and retina
4
H49-H52
disorders of ocular muscles, binocular movement, accomodation and refraction
1
H80-H83
diseases of the inner ear
2
I60-I69
cerebrovascular diseases
4
J30-J39
other diseases of the upper respiratory tract
1
J40-J47
chronic lower respiratory diseases
1
K70-K77
diseases of the liver
3
M60-M79
disorders of muscles
2
M80-M89
disorders of bone density and structure
3
Z00-Z99
factors influencing health status and contact with health services
3
comorbidity index =
= SUM(points for all comorbidities based on ICD10 code)
Interpretation:
• minimum comorbidity score: 0
• maximum comorbidity score: depends on the number of comorbidities coded
• The higher the index the greater the risk of developing dementia, at least in Korea.
• One issue in scoring is the number of comorbid conditions recorded and the number of comorbid conditions allowed for each ICD10 group.
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