Chronic Obstructive Pulmonary Disease Activity Rating Scale (CARS)
Name of QuestionnaireChronic Obstructive Pulmonary Disease Activity Rating Scale (CARS)
DescriptionDisease-specific instrument designed to measure life-related activity. Developed for use by patients with chronic obstructive pulmonary disease.
Developer(s)M Morimoto, K Takai, K Nakajima, K Kagawa
Faculty of Health Science
Okayama University Medical School
5-2-1 Sikata-cho Okayama-shi
Cost & availabilityPermission must be obtained from the authors.
Time to complete
Number of items
Domains & categories (#)4 sections and total scale
Name of categories/domains
Self-care, Domestic, Outdoor and Social Interaction Activities.
Scaling of items3-point scale (0 dependant; 1 partially dependant; 2 completely dependent.)
ScoringTotal score and subscores on domains (higher scores indicate less impairment)
ValidityThe correlation between the total score in the CARS and the PCS of the SF-12 was 0.58 (p<0.01). The correlation coefficient between the CARS and pulmonary function tests was 0.47 for the FVC, 0.51 for the FEV1 and 0.39 for the %FEV1-predicted (p<0.01). The correlation between the breathlessness scores (per Fletcher Hugh-Jones) and the CARS scores was -0.62 (P<0.01).
ResponsivenessBased on empirical data, CARS scores were significantly different across the four clinical classes of activity limitation to daily life1.
Clinical UseNot reported.
Translations: Not reported
Date of information