Activities of daily living as quantitative indicators of nursing effort.

Functional assessments of elderly or disabled people requiring long-term care have been used by clinicians for many years, and functional assessment instruments are now being used as indicators of required nursing care and its cost. The authors examine the ability of functional assessment items and instruments to measure accurately the variation in nursing care used by nursing home patients, with analysis of 290 patients. Nursing times, measured for each patient by nurse category (registered and all other) and type of care (skilled and personal) measure resource consumption. Activities of daily living (ADLs): eating, bathing, dressing, toileting, transferring, and continence are used to measure functional abilities on a four-point scale: independent, supervised, assisted or helped, and dependent, as well as two derived scales: Katz's Index and Resource Utilization Groups. The four-point measurement scales for ADLs are found to be necessary as indicators of nursing time required by patients. As a consequence, the three-point scales used for ADLs in the Long-term Care Minimum Data Set are not adequate, at least in nursing homes, for resource allocation. The relationship of nursing times with individual ADLs is nonlinear, so linear statistical techniques such as principal components, canonical correlations, or linear regression are inappropriate to produce patient classification systems based on ADLs. Individual ADLs do not explain use of registered nursing care time as well as they do care time by other nursing staff. Therefore, resource allocation and staffing for registered nurses must be done separately from nursing personnel, using indicators other than ADLs.