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Table 3 Spearman correlations between 1-year changes in the 15D variables and instrument scores

From: Patient-reported outcomes in coronary artery disease: the relationship between the standard, disease-specific set by the International Consortium for Health Outcomes Measurement (ICHOM) and the generic health-related quality of life instrument 15D

Item SAQ-7 SAQ-PL SAQ-AF SAQ-QL RDS PHQ-2
Mobility 0.25 0.31 0.18 0.23 0.20 0.15
Vision 0.03 0.05 0.04  − 0.01 0.03 0.03
Hearing 0.06 0.04 0.06 0.05 0.08 0.01
Breathing 0.31 0.25 0.23 0.31 0.42 0.20
Sleeping 0.10 0.01 0.10 0.14 0.12 0.03
Eating 0.09 0.13 0.06 0.08 0.04 0.06
Speech 0.02 0.04  − 0.01  − 0.04 0.13 0.07
Excretion 0.07 0.10 0.10 0.05  − 0.05 0.16
Usual activities 0.36 0.36 0.24 0.35 0.23 0.31
Mental functions 0.03 0.02 0.00 0.05 0.14 0.15
Discomfort and symptoms 0.24 0.17 0.23 0.21 0.13 0.16
Depression 0.21 0.22 0.20 0.22 0.20 0.38
Distress 0.21 0.13 0.18 0.22 0.22 0.34
Vitality 0.35 0.31 0.22 0.36 0.29 0.31
Sexual activity 0.29 0.26 0.17 0.26 0.26 0.30
Overall 15D score 0.42 0.40 0.33 0.41 0.40 0.41
  1. The Spearman correlation coefficient values r < 0.3 were considered poor, values 0.3 ≤ r < 0.6 fair, values 0.6 ≤ r < 0.8 moderately strong, and values r ≥ 0.8 strong
  2. PHQ-2, two-item Patient Health Questionnaire; RDS, Rose Dyspnea Scale; SAQ-AF, Seattle Angina Questionnaire Angina Frequency; SAQ-PL, Seattle Angina Questionnaire Physical Limitation; SAQ-QL, Seattle Angina Questionnaire Quality of Life; SAQ-7, Seattle Angina Questionnaire short-form; 15D, 15-dimensional instrument