Diagnostic criteria: For the diagnosis of dementia, the International Classification of Health Problems in Primary Care (ICHPPC-2 defined) requires a progressive decrease of intellectual capacities, with a deterioration of at least three functions out of five: orientation in time, place or persons, short-term memory, abstracting, making simple calculations and affective alterations or personality disorders .
ICHPPC-2 defined: International classification of health problems in primary care.
The diagnoses listed are derived from ICHPPC-2 by selection and combination.
A 10th service, performing a pregnancy test, was omitted because its most obvious reason is not included in either ICHPPC-2 or our recording form - a woman's question of whether or not she is pregnant.
For that study E-list criteria (the first classification for general practice, developed in the United Kingdom and derived from the ICD) was used initially and was later replaced with ICHPPC-2
criteria.[45,13] In all the other studies DSM,[40,42,43] RDC,[38,42-44] or criteria derived from the RDC for use in elderly populations[39-41] (obtained with GMS-AGECAT, a computerized diagnostic system for elderly subjects derived from the Geriatric Mental State) were used.
Each episode of care is classified and coded according to the ICHPPC-2. Classifications are corrected after follow-up whenever necessary.
Overall morbidity for patients in this study comprises the total number of registered ICHPPC-2 health problems per 1000 patient years over a period of 5 years.
ICHPPC-2 defined (International classification of health problems in primary care).
Before January 1989, when this intervention began, the clinicians manually maintained an active problem list in a conspicuous place in the chart and manually recorded the diagnosis or diagnoses for each office visit on a computer-generated billing sheet (the encounter form) using International Classification of Health Problems in Primary Care-2 (ICHPPC-2) codes. The encounter form included patient demographics, appointment time, and some laboratory, radiography, and pharmacy data, as well as a place for entering the ICHPPC-2 codes for the office visit.
A list of all the diagnoses used by the practice was developed in 1988 from a computer-generated list of all ICHPPC-2 coded diagnoses seen by the practice.
Patient computer records that contained ICHPPC-2 codes and problems that could not be converted to ICD-9-CM were deleted, and a computerized notation was made to indicate that there was a conversion problem and a deleted diagnosis.
The codes of common diagnoses, listed on the back of the form for reference by the provider, were organized numerically by ICHPPC-2