Table 3.
Exploratory factor analysis of SAQ before removal of failed Items
| Exploratory factor analysis of the SAQ hypothesised scale/item | Component/factor loadings | |||
|---|---|---|---|---|
| Factor 1 | Factor 2 | Factor 3 | Factor 4 | |
| Dressing | 0.733 | |||
| Walking indoors | 0.612 | |||
| Showering | 0.757 | |||
| Climbing a hill/stair | 0.447 | 0.522 | 0.054 | 0.418 |
| Gardening/vacuuming | 0.459 | 0.560 | 0.035 | 0.349 |
| Walking more than a block | 0.652 | |||
| Running or jogging | 0.881 | |||
| Lifting or moving heavy objects | 0.793 | |||
| Participate in strenuous sports | 0.854 | |||
| Symptoms of Angina during strenuous activities | 0.523 | |||
| Frequency of symptoms | 0.657 | |||
| Frequency of use of medication | 0.482 | |||
| Bothersome with taking pills as prescribed | 0.205 | |||
| Satisfaction that everything being done | 0.794 | |||
| Satisfaction with doctor’s explanation | 0.757 | |||
| Overall satisfaction with treatment | 0.882 | |||
| Interference with enjoyment of life? | 0.714 | |||
| Feelings about symptoms persistent | 0.692 | |||
| Worry about heart attach/death | 0.492 | |||
NB: SAQ Seattle Angina Questionnaire. Factor 1: indoor physical functioning, Factor 2: outdoor physical functioning, Factor 3: treatment experience, Factor 4: angina symptoms burden. Bold text and values are items with cross factor loadings and loadings lower than 0.4