PT  - JOURNAL ARTICLE
AU  - Rainer Gloeckl
AU  - Inga Heinzelmann
AU  - Katrin Beutel
AU  - Andreas Jerrentrup
AU  - Klaus Kenn
TI  - Correlation between single items in COPD assessment test (CAT) and outcome parameters of pulmonary rehabilitation (PR)
DP  - 2013 Sep 01
TA  - European Respiratory Journal
PG  - P2236
VI  - 42
IP  - Suppl 57
4099  - http://erj.ersjournals.com/content/42/Suppl_57/P2236.short
4100  - http://erj.ersjournals.com/content/42/Suppl_57/P2236.full
SO  - Eur Respir J2013 Sep 01; 42
AB  - BackgroundThe COPD Assessment Test (CAT) is a short, validated and simple to use quality of life questionnaire that assesses the impact of COPD on health status. The CAT sum score is well validated. Correlations between single items have not been investigated yet.ObjectiveAim of this prospective study was to identify correlations between single items of the CAT and standard outcome parameters of PR like exercise capacity, physical activity and health related quality of life.Methods50 COPD-patients (60±8 ys, FEV1: 32±9%pred., DLCO: 36±18%pred.) performed a 6-minute walking test, activity monitoring (72 hours) and completed the CAT, SGRQ and HADS.ResultsPrior to PR, CAT item “cough” correlated best with SGRQ category “symptoms” (r=0.42, p=0.004; post PR: r=0.49, p=0.001), item “breathless when walking” with SGRQ “symptoms” (r=0.37, p=0.01; post PR best correlation with 6MWD: r=-0.35, p=0.01), item “limitations doing activities at home” with SGRQ “activity” (r=0.52, p<0.0001; post PR: r=0.66, p<0.0001), item “confident leaving my home” with HADS depression (r=0.58, p<0.0001; post PR with SGRQ “impacts”: r=0.73, p<0.0001) and item “have lots of energy” with HADS anxiety (r=0.54, p<0.0001; post PR with HADS depression: r=0.77, p>0.0001). Weak but significant correlations were found post PR between steps per day and item “limitations doing activities at home” (r=-0.38, p=0.01) and “confident leaving my home” (r=-0.32, p=0.03).ConclusionCategories of SGRQ and HADS showed the best accordance to single items of the CAT score. It was possible to allocate some of the CAT questions to the measured outcome parameters.