Table 2.
Rotated component matrix of the 15D dimension values and instrument scores
| Item at baseline | Factor (% of variance explained) | ||||
|---|---|---|---|---|---|
| 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