Disease counts: 98 studies
Disease counts were defined as a simple unweighted enumeration of the number of disease. Disease counts specify whether the person has 1 or more of a limited list of conditions, but the conditions included in this list varied in different studies from 9to 35 different items. These items may have been individual conditions,diseases, health problems, or categories of conditions or diseases. Disease counts may be selfish-rated, clinician-rated, or extracted from records. Disease counts are the most commonly used measures of multi morbidity and have been used mainly in relation to patient demographic characteristics and health outcomes and to a lesser extent process measures.