TY - JOUR
T1 - Assessment of the psychometric properties of an English version of the cancer dyspnea scale in people with advanced lung cancer
AU - Uronis, Hope
AU - Shelby, Rebecca
AU - Currow, David
AU - Ahmedzai, Sam
AU - Bosworth, Hayden
AU - Coan, April
AU - Abernethy, Amy
PY - 2012/11
Y1 - 2012/11
N2 - Context: Dyspnea is a poorly understood subjective sensation. Existing dyspnea measures fail to adequately address its multidimensionality. A Japanese group developed and validated the Cancer Dyspnea Scale (CDS) for assessing dyspnea in patients with advanced lung cancer. Objectives: We evaluated the validity and reliability of the English version of the CDS (CDS-E) that has 12 items and takes, on average, 140 seconds for individuals to complete. Methods: Eligible patients had advanced lung cancer, consented, and were fluent in English. Participants completed a 100 mm visual analogue scale (VAS), the modified Borg scale, the CDS-E, the Hospital Anxiety and Depression Scale, and the Functional Assessment of Cancer Therapy - Lung quality-of-life scale. Demographic, radiographic, and treatment information were obtained from patients' medical records. Results: One hundred twelve participants were enrolled at three sites in the U.S., Australia, and the U.K. Mean age was 64.5 years (SD 11.5); 90% were Caucasian, 68% had Eastern Cooperative Oncology Group performance status 0-1, and 50% had non-small cell carcinoma. All completed the CDS-E independently, without difficulty. The CDS-E had reasonable internal consistency overall (Cronbach's α = 0.71) and for each of the three factors (effort, anxiety, discomfort Cronbach's α = 0.80-0.84). CDS-E scores were significantly correlated with the 100 mm VAS (r = 0.82; P < 0.001) and the modified Borg (r = 0.87; P < 0.001). After factor analysis, the CDS-E was revised by removing three items (r-CDS-E). Conclusion: The CDS-E and r-CDS-E are reliable and valid measures of the sensation and the psychological components of dyspnea, with the shorter version having similar psychometric properties.
AB - Context: Dyspnea is a poorly understood subjective sensation. Existing dyspnea measures fail to adequately address its multidimensionality. A Japanese group developed and validated the Cancer Dyspnea Scale (CDS) for assessing dyspnea in patients with advanced lung cancer. Objectives: We evaluated the validity and reliability of the English version of the CDS (CDS-E) that has 12 items and takes, on average, 140 seconds for individuals to complete. Methods: Eligible patients had advanced lung cancer, consented, and were fluent in English. Participants completed a 100 mm visual analogue scale (VAS), the modified Borg scale, the CDS-E, the Hospital Anxiety and Depression Scale, and the Functional Assessment of Cancer Therapy - Lung quality-of-life scale. Demographic, radiographic, and treatment information were obtained from patients' medical records. Results: One hundred twelve participants were enrolled at three sites in the U.S., Australia, and the U.K. Mean age was 64.5 years (SD 11.5); 90% were Caucasian, 68% had Eastern Cooperative Oncology Group performance status 0-1, and 50% had non-small cell carcinoma. All completed the CDS-E independently, without difficulty. The CDS-E had reasonable internal consistency overall (Cronbach's α = 0.71) and for each of the three factors (effort, anxiety, discomfort Cronbach's α = 0.80-0.84). CDS-E scores were significantly correlated with the 100 mm VAS (r = 0.82; P < 0.001) and the modified Borg (r = 0.87; P < 0.001). After factor analysis, the CDS-E was revised by removing three items (r-CDS-E). Conclusion: The CDS-E and r-CDS-E are reliable and valid measures of the sensation and the psychological components of dyspnea, with the shorter version having similar psychometric properties.
KW - Cancer Dyspnea Scale
KW - Dyspnea (MeSH)
KW - lung neoplasms (MeSH)
KW - reproducibility of results (MeSH)
KW - symptom measurement
UR - http://www.scopus.com/inward/record.url?scp=84868578864&partnerID=8YFLogxK
U2 - 10.1016/j.jpainsymman.2011.10.027
DO - 10.1016/j.jpainsymman.2011.10.027
M3 - Article
VL - 44
SP - 741
EP - 749
JO - Journal of Pain and Symptom Management
JF - Journal of Pain and Symptom Management
SN - 0885-3924
IS - 5
ER -