Reliability of the Manchester Respiratory Activities of Daily Living Questionnaire as a postal questionnaire

Age Ageing. 2002 Sep;31(5):355-8. doi: 10.1093/ageing/31.5.355.

Abstract

Background: The Manchester Respiratory Activities of Daily Living Questionnaire is a new scale designed to assess respiratory disability in elderly outpatients with chronic obstructive pulmonary disease. However, it has not been examined for its reliability as a postal questionnaire.

Objective: To investigate test-retest reliability of the Manchester Respiratory Activities of Daily Living as a postal questionnaire and to compare face-to-face administration by a physiotherapist with postal completion.

Design: Two single-blind studies were performed to investigate test-retest reliability of the Manchester Respiratory Activities of Daily Living Questionnaire in elderly patients with chronic obstructive pulmonary disease. Study 1 comprised 51 subjects (27 men) with chronic obstructive pulmonary disease, aged 61-87 (mean 74) years. They completed the Manchester Respiratory Activities of Daily Living Questionnaire twice mailed to them at home (second questionnaire after two weeks). Study 2 comprised a separate and previously unstudied group of 36 subjects with chronic obstructive pulmonary disease (24 men), aged 60-82 (mean 71) years who also completed the Manchester Respiratory Activities of Daily Living Questionnaire twice, first face-to-face by a physiotherapist and then two weeks later at home.

Results: Mean (SD) one second forced expiratory volume (FEV1) were: Study 1=0.93 (0.30) litres; Study 2=1.01 (0.43) litres. Mean [SEM] difference between two periods Manchester Respiratory Activities of Daily Living Questionnaire score (Study 1) was 0.07 [0.3] and (Study 2) was 0.17 [0.5]. The 95% limits of agreement were -0.69 to +0.54 and -1.21 to +0.87 and standard error of measurement of 'repeatability' square root 1.55 and 1.71 respectively for Manchester Respiratory Activities of Daily Living Questionnaire. Intraclass correlation coefficients were Study 1, ICC (1,1)=0.92, 95% confidence interval 0.87 to 95; Study 2, ICC (1,1)=0.86, 95% confidence interval (0.79 to 94).

Conclusion: The Manchester Respiratory Activities of Daily Living Questionnaire scale is acceptable and repeatable as a postal questionnaire in elderly patients with chronic obstructive pulmonary disease.

Publication types

  • Validation Study

MeSH terms

  • Activities of Daily Living*
  • Aged
  • Aged, 80 and over
  • Disability Evaluation*
  • England
  • Female
  • Forced Expiratory Volume / physiology
  • Health Surveys
  • Humans
  • Male
  • Middle Aged
  • Pulmonary Disease, Chronic Obstructive / physiopathology*
  • Pulmonary Disease, Chronic Obstructive / psychology
  • Reproducibility of Results