Functional outcomes of nursing home residents in relation to features of the environment: validity of the Professional Environmental Assessment Protocol.

OBJECTIVES The aim of this article was to examine associations between specific dimensions of nursing home environments and the functional ability (walking and eating) of residents with dementia, and to contribute to the ongoing psychometric development of the Professional Environmental Assessment Protocol (PEAP). DESIGN One-year prospective cohort study. SETTING Fifteen nursing homes in a western Canadian province. PARTICIPANTS Convenience sample of 120 nursing home residents with middle-stage dementia. MEASUREMENTS Every 2 weeks we observed residents' abilities to walk to the dining room and to feed themselves. At the end of a year of observation and immediately following a brief interview with the unit managers, we used the PEAP to measure the extent to which 9 specific dimensions of nursing home environments support the ability of residents with dementia to walk and to eat. Cox proportional hazards models were used to evaluate the effect of specific environmental features on residents' walking and eating disability. RESULTS "Support of functional ability" was associated with a reduced hazard of both walking and eating disability. The environmental dimensions of "maximizing awareness and orientation" and better "quality of stimulation" were associated specifically with reduced hazard of walking disability, whereas the dimensions of the nursing home environment specifically associated with a reduced hazard of eating disability included improved "safety and security," "opportunities for personal control," and "regulation of stimulation." The Cox proportional hazards models using the 13-point PEAP scale were not significantly different from nested models using the 5-point PEAP scale, indicating that the 2 scales did not differ in their ability to discriminate between more and less supportive environments for residents with dementia. CONCLUSIONS Specific dimensions of the nursing home environment reduced the hazard of walking disability, whereas others reduced the hazard of eating disability. Modifying specific features of nursing home environments may reduce disability in nursing home residents with dementia. The 5-point PEAP scale is able to discriminate between nursing home environments as well as the 13-point scale.