Validity and reliability of the APAFOP questionnaire for Spanish institutionalized older adults with cognitive impairment
Abstract
Objective: The existing number of questionnaires specifically designed for assessing physical activity in Spanish elderly is scarce. None has been validated on individuals with cognitive impairment. This study aims at identifying the validity and reliability of the APAFOP questionnaire on a sample made up of institutionalized people with cognitive impairment.
Methods: Thirty-one people (mean age 83.84±7.55 years old) answered the questionnaire twice in an interval of 24 (test-retest reliability). The APAFOP’s construct validity was directly assessed by means of an accelerometer AciGraph GT3X and indirectly assessed through the test Repeated chair stands, the 12-Item Short-Form Health Survey and the Barthel Index.
Results: A statistically significant correlation was found between the total score of the APAFOP and the counts/day and the number of steps provided by the accelerometer (r=0.701; Sig=0.001 and r=0.648; Sig=0.001 respectively). The questionnaire showed a high test-retest reliability (ICC=0.985; CI=0.969-0.993).
Conclusions: The Spanish adapted version of the APAFOP questionnaire can be considered a valid and reliable tool for estimating the physical activity performed by institutionalized elderly people with cognitive impairment.