Functional Performance Inventory
Name of Questionnaire
Functional Performance Inventory (FPI)
The FPI is a self-report measure of functional performance developed from an explicit analytical framework 1 and COPD patients themselves. Performance is defined as the day-to-day activities patients do to meet basic needs, fulfill usual roles, and maintain their health and well-being.
Nancy Kline Leidy PhD RN
Cost & availability
None; contact NK Leidy for permission.
Time to complete
Number of items
Domains & categories
Name of categories/domains
Body care (9 items), household maintenance (21 items), physical exercise (7 items), recreation (11 items), spiritual activities (5 items), social activities (12 items)
Scaling of items
4-point scale (from activity can be performed easily to activity is no longer performed for health reasons) and not applicable category
High scores reflect better functioning. Subscale and total scores are expressed as mean values.
Based on literature and qualitative interviews with patients 3 . Significant correlations between FPI total score and Functional Status Questionnaire, Duke Activity Status Index, Bronchitis-Emphysema Symptom Checklist, Basic Need Satisfaction Inventory and Cantril's Ladder of Life Satisfaction 2 . Significant correlations between FPI and socially expected activities and free-time activities subscales of Katz Adjustment Scale for Relatives 2 . Concurrent validity shown through significant correlations between FPI total score and the Sickness Impact Profile physical functioning scale, the SF-36 physical function scale, Physical Activity Scale for the Elderly, and the American Thoracic Society-Division of Lung Disease Breathlessness scale 4 . Discriminant validity demonstrated through differentiation between patients with different levels of perceived severity and activity limitation and FEV1 2 .
Minimally important difference
Original: English (US)
Date of information
Comments from developer
Yes, March 1999