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Reliability

Validity

Minimal Clinically Significant Difference

References

Instruments

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Chronic Obstructive Pulmonary Disease Activity Rating Scale (CARS)

Name of Questionnaire

Description

Disease-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

Address

Michiko Morimoto
Faculty of Health Science
Okayama University Medical School
5-2-1 Sikata-cho Okayama-shi
Okayama 700-8558
JAPAN

E-mail

mmichiko@md.okayama-u.ac.jp

Cost & availability

Permission must be obtained from the authors.

Administration

Self-reported

Time to complete

Not reported

Number of items

Domains & categories (#)

4 sections and total scale

Name of categories/domains

Self-care, Domestic, Outdoor and Social Interaction Activities.

Scaling of items

3-point scale (0 dependant; 1 partially dependant; 2 completely dependent.)

Scoring

Total score and subscores on domains (higher scores indicate less impairment)

Reliability

a. Test-Retest/Reproducibility	Not Reported
b. Internal Consistency	Reported¹

Validity

The 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).

Responsiveness

Based on empirical data, CARS scores were significantly different across the four clinical classes of activity limitation to daily life¹.

Research Use

Reported¹

Clinical Use

Not reported.

Language(s)

Original: Japanese

Translations: Not reported

References

Morimoto M, Takai K, Nakajima K, Kagawa K. Development of the Chronic Obstructive Pulmonary Disease Activity Rating Scale: Reliability, validity and factorial structure. Nursing and Health Sciences. 2003; 5:23-30. .

Date of information

July 2002