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Psychometric properties and factor structure of the Neuropsychiatric Inventory Nursing Home version in an elderly neuropsychiatric population
Author(s) -
Lange Rael T.,
Hopp Grace A.,
Kang Nirmal
Publication year - 2004
Publication title -
international journal of geriatric psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 129
eISSN - 1099-1166
pISSN - 0885-6230
DOI - 10.1002/gps.1108
Subject(s) - varimax rotation , population , psychiatry , exploratory factor analysis , geriatric psychiatry , dementia , clinical psychology , psychometrics , psychology , discriminant validity , cronbach's alpha , mood , medicine , internal consistency , environmental health , disease , pathology
Abstract Background The Neuropsychiatric Inventory (NPI) is an interview‐based instrument designed to elicit information from an informal caregiver to evaluate behavioral disturbances in persons with dementia. Minor modifications of this instrument have produced the Neuropsychiatric Inventory—Nursing Home version (NPI‐NH), a version specifically designed for interviewing professional care facility staff. The purpose of this investigation is to further understand the psychometric properties of the NPI‐NH by examining its reliability, validity, and factor structure in an elderly neuropsychiatric population. Method Participants were 204 elderly inpatients from a large provincial neuropsychiatric hospital in British Columbia, Canada. Data were collected as part of a patient needs assessment project. Results The internal consistency reliability of the NPI‐NH was α=0.67. An exploratory principal axis analysis with varimax rotation revealed five factors that accounted for 63.2% of the variance. These factors reflect aspects of psychiatric disturbance associated with: (a) Agitation; (b) Mood; (c) Psychosis; (d) Sleep/Motor Activity; and (e) Elevated Behavior. Convergent and discriminant validity of the five factors by correlating them with other behavioral measures was considered satisfactory. Conclusions These results provide support for the clinical use of the NPI‐NH as a screen for neuropsychiatric symptoms in an elderly neuropsychiatric population. However, additional research is encouraged to further evaluate the clinical utility of the NPI‐NH in nursing home and inpatient geriatric settings. Copyright © 2004 John Wiley & Sons, Ltd.