An understanding of the habitual physical activity levels of children with chronic disorders is an important consideration relevant to both treatment and clinical monitoring (8). However, a feasible and useful tool for measuring the physical activity levels of children with chronic illness in clinical settings is not readily available. In this article, we review the development and initial psychometric testing (i.e., construct and reliability) of the Habitual Activity Estimation Scale (HAES), a measure developed for use in clinical research. A summary of these investigations suggests that the HAES appears both valid and reliable as a measure of activity in pediatric populations.
Hay is with the Department of Community Health Sciences, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario; Cairney is with Health Systems Research and Consulting Unit, Centre for Addiction and Mental Health, Departments of Psychiatry and Public Health Sciences, University of Toronto, 33 Russell Street 3rd Floor Tower, Toronto, Ontario.