Table 4.
Exploratory factor analysis of the SAQ for stable angina patients after removal of failed items (SAQ-CAN)
| Hypothesised scale/item | Component/factor loadings | |||
|---|---|---|---|---|
| Factor 1 | Factor 2 | Factor 3 | Factor 4 | |
| Dressing | 0.767 | |||
| Walking indoors | 0.566 | |||
| Showering | 0.806 | |||
| Walking more than a block | 0.631 | |||
| Running or jogging | 0.888 | |||
| Lifting or moving heavy objects | 0.779 | |||
| Participate in strenuous sports | 0.858 | |||
| Symptoms of Angina during strenuous activities | 0.525 | |||
| Frequency of symptoms | 0.656 | |||
| Frequency of use of medication | 0.481 | |||
| Satisfaction that everything being done | 0.796 | |||
| Satisfaction with doctor’s explanation | 0.759 | |||
| Overall satisfaction with treatment | 0.889 | |||
| Interference with enjoyment of life? | 0.733 | |||
| Feelings about symptoms persistent | 0.705 | |||
| Worry about heart attach/death | 0.494 | |||
SAQ Seattle Angina Questionnaire, Factor 1: indoor physical functioning, Factor 2: outdoor physical functioning, Factor 3: treatment experience, Factor 4: angina symptoms burden