Table 1

Study Designslegend

Study and PatientsReference MeasureAnalysis
Reliability Study
 Cohort with stable CHFThree-month change in KCCQ scoresPaired t test
Responsiveness Study
 Cohort with initially decompensated CHFThree-month change in KCCQ scoresPaired t test; Guyatt’s responsiveness statistic
Validation of KCCQ Domains
 Physical limitationDistance covered in a 6 minute walk test, NYHA class, SF-36 and LiHFe physical limitation domainsCorrelation
 Symptom stabilityDifference in scores between stable and decompensated patientsTwo-sample, independent t test
 SymptomsNYHA classCorrelation
 Self-efficacyDifference in scores between stable and decompensated patientsTwo-sample, independent t test
 Social limitationNYHA class, SF-36 social scaleCorrelation
 Quality of lifeSF-36 general health scale, NYHACorrelation
 KCCQ functional statusNYHA class, end point of survival or hospitalizationCorrelation, t test
 KCCQ clinical summaryNYHA class, end point of survival or hospitalizationCorrelation, t test
  • legend CHF = congestive heart failure; KCCQ = Kansas City Cardiomyopathy Questionnaire; LiHFe = Minnesota Living with Heart Failure Questionnaire; NYHA = New York Heart Association classification; and SF-36 = Short Form-36.