Development of a parent-proxy quality-of-life chronic cough-specific questionnaire: Clinical impact vs psychometric evaluations

Newcombe, Peter A., Sheffield, Jeanie K., Juniper, Elizabeth F., Marchant, Julie M., Halsted, Ria A., Masters, I. Brent and Chang, Anne B. (2008) Development of a parent-proxy quality-of-life chronic cough-specific questionnaire: Clinical impact vs psychometric evaluations. Chest, 133 2: 386-395. doi:10.1378/chest.07-0888


Author Newcombe, Peter A.
Sheffield, Jeanie K.
Juniper, Elizabeth F.
Marchant, Julie M.
Halsted, Ria A.
Masters, I. Brent
Chang, Anne B.
Title Development of a parent-proxy quality-of-life chronic cough-specific questionnaire: Clinical impact vs psychometric evaluations
Journal name Chest   Check publisher's open access policy
ISSN 0012-3692
1931-3543
Publication date 2008-02-01
Year available 2008
Sub-type Article (original research)
DOI 10.1378/chest.07-0888
Open Access Status
Volume 133
Issue 2
Start page 386
End page 395
Total pages 10
Editor Pamela Goorsky
Richard Irwin
Steve Welch
Jean Rice
Place of publication Chicago, Ill., U.S.
Publisher American College of Chest Physicians
Language eng
Subject C1
170110 Psychological Methodology, Design and Analysis
110203 Respiratory Diseases
970117 Expanding Knowledge in Psychology and Cognitive Sciences
920115 Respiratory System and Diseases (incl. Asthma)
1103 Clinical Sciences
Formatted abstract
Background
Chronic cough affects at least 7% of children, and the impact of this on families is significant. Although adult cough-specific quality-of-life (QOL) instruments have been shown to be a useful cough outcome measure, no suitable cough-specific QOL for parents of children with chronic cough exists. This article compares two methods of item reduction (clinical impact and psychometric) and reports on the statistical properties of both QOL instruments.

Method

One hundred seventy children (97 boys and 73 girls; median age, 4 years; interquartile range, 3 to 7.25 years) and one of their parents participated. A preliminary 50-item parent cough-specific QOL (PC-QOL) questionnaire was developed from conversations with parents of children with chronic cough (ie, cough for > 3 weeks). Parents also completed generic QOL questionnaires (eg, Pediatric Quality of Life Inventory, version 4.0 [PedsQL4.0] and the 12-item Short Form Health Survey, version 2 [SF-12v2]).

Results

The clinical impact and psychometric method of item reduction resulted in 27-item and 26-item PC-QOL questionnaires, respectively, with approximately 50% of items overlapping. Internal consistency among the final items from both methods was excellent. Some evidence for concurrent and criterion validity of both methods was established as significant correlations were found between subscales of the PC-QOL questionnaire and the scales of the SF-12v2 and PedsQL4.0 scores. The PC-QOL questionnaire derived from both methods was sensitive to change following an intervention.

Conclusion
Chronic cough significantly impacts on the QOL of both parents and children. Although the PC-QOL questionnaires derived from a clinical impact method and from a psychometric method contained different items, both versions were shown to be internally consistent and valid. Further testing is required to compare both final versions to objective and subjective cough measures.
© 2008 American College of Chest Physicians


Keyword Clinical impact
Cough
Measurement
Quality of life
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 40 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 46 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 09 Apr 2009, 22:13:40 EST by Lucy O'Brien on behalf of Faculty of Social & Behavioural Sciences