ATS American Thoracic Society
Recent Abstracts

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.


NK Leidy


Nancy Kline Leidy PhD RN
Center for Health Outcomes Research
MEDTAP International Inc.
7101 Wisconsin Avenue, Suite 600
Bethesda, MD 20814



Cost & availability

None; contact NK Leidy for permission.



Time to complete

Not reported

Number of items


Domains & categories

6 subscales

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.


a. Test-retest/reproducibility Reported 2
b. Internal consistency Reported 2


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 .


Not determined

Minimally important difference

Not determined

Research use

Not reported

Clinical use

Not reported


Original: English (US)


  1. Leidy NK. Functional status and the forward progress of merry-go-rounds: Toward a coherent analytical framework. Nurs Res 1994;43(4):196-202.
  2. Leidy NK. Psychometric properties of the Functional Performance Inventory in patients with chronic obstructive pulmonary disease. Nurs Res 1999;48(1):20-28.
  3. Leidy NK, Haase JE. Functional performance in people with chronic obstructive pulmonary disease: a qualitative analysis. Adv Nurs Sci 1996;18(3):77-89.
  4. Larson JL, Kapella MC, Wirtz S, Covey MK, Berry B. Reliability and validity of the Functional Performance Inventory in patients with moderate to severe chronic obstructive pulmonary disease. J Nurs Measurement 1998;6(1):55-73.

Date of information

March 1999

Comments from developer

Yes, March 1999

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