Dementia among nursing home patients: defining the condition, characteristics of the demented, and dementia on the RUG-II classification system Page: 4
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data base to others collected in long term care by Case Mix Project
Staff revealed that there was high relative agreement between "propor-
tions" in this data base and the others and that there the PAl data was
not heavily skewed in any dimension.
DEFINING THE CONDITION DEMENTIA
Any illness, including dementia, is both a medical condition and a
severity. In this section of the paper, definitions of both the medical
condition and its severity are presented.
The Dementia Medical Condition.
Medical conditions are characterized by the diagnosis assigned to
the patient by health care professionals and more centrally, the
physician. A diagnosis represents a conclusion to a study of a patient
including their symptoms and values of tests performed on the patient.
The medical condition dementia spans many different diagnosis under the
ICD-9 CM coding system. For many diagnosis codes, the judgement that
the disease represented by the code meets the conditions of dementia is
straightforward while for others, the decision is more difficult. The
judgement requires knowledge of the clinical manifestations of the
disease and comparison of these to the definition of dementia.
In Table 1, a list of diagnoses identified as meeting the medical
condition of dementia are listed. This list was developed on review of
the ICD-9 CM coding system and consultation with clinicians. Patients
who have one or more of the diagnosis listed, whether as primary,
secondary, or tertiary are considered to meet the medical condition of
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Foley, William J. Dementia among nursing home patients: defining the condition, characteristics of the demented, and dementia on the RUG-II classification system, report, April 1986; (digital.library.unt.edu/ark:/67531/metadc97460/m1/4/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.