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

Table 2 Rotated component matrix of the 15D dimension values and instrument scores

Item at baseline	Factor (% of variance explained)
Item at baseline	1 (32.9%)	2 (9.8%)	3 (7.1%)	4 (5.8%)	5 (5.4%)
SAQ-PL	0.70	0.12	0.29	0.24	0.18
SAQ-AF	0.19	0.08	0.87	0.02	0.11
SAQ-QL	0.35	0.23	0.79	0.07	0.01
RDS	− 0.81	− 0.11	− 0.16	− 0.05	0.01
PHQ-2	− 0.21	− 0.62	− 0.20	− 0.04	− 0.22
15D mobility	0.74	0.01	0.05	0.18	0.12
15D vision	0.12	0.16	0.14	0.36	0.47
15D hearing	0.13	− 0.14	0.16	0.21	0.69
15D breathing	0.83	0.03	0.07	0.13	0.09
15D sleeping	0.25	0.37	− 0.02	0.61	− 0.14
15D eating	0.14	− 0.07	0.05	0.65	0.18
15D speech	0.12	0.46	− 0.12	0.16	0.53
15D excretion	0.05	0.14	0.01	0.67	0.17
15D usual activities	0.60	0.33	0.29	0.03	0.34
15D mental functions	0.13	0.54	− 0.14	− 0.06	0.50
15D discomfort and symptoms	0.37	0.28	0.28	0.35	0.07
15D depression	0.13	0.81	0.12	0.15	− 0.06
15D distress	0.02	0.82	0.15	0.15	0.06
15D vitality	0.62	0.46	0.18	0.20	0.06
15D sexual activity	0.45	0.31	0.08	− 0.16	0.36

The highest loadings are bolded
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

ISSN: 1477-7525