Table 2.
Floor, ceiling item ceiling effect and item-total correlation for SAQ-CAN items
| Scale/item | %floor | %ceiling | Item-total correlation |
|---|---|---|---|
| Indoor physical functioning | |||
| Dressing | 0.22 | 1.60 | 0.645 |
| Walking indoors | 0.54 | 2.67 | 0.560 |
| Showering | 0.37 | 1.90 | 0.666 |
| Outdoor physical functioning | |||
| Walking more than a block | 11.60 | 7.38 | 0.704 |
| Running or jogging | 27.67 | 29.34 | 0.856 |
| Lifting or moving heavy objects | 16.86 | 16.78 | 0.808 |
| Participate in strenuous sports | 27.81 | 35.24 | 0.809 |
| Treatment experience | |||
| Satisfaction that everything being done | 1.83 | 55.92 | 0.790 |
| Satisfaction with doctor’s explanation | 1.80 | 55.73 | 0.735 |
| Overall satisfaction with treatment | 1.85 | 51.18 | 0.842 |
| Angina symptoms burden | |||
| Symptoms of angina during strenuous activities | 4.00 | 4.058 | 0.545 |
| Frequency of symptoms | 3.63 | 37.02 | 0.672 |
| Frequency of use of medication | 1.11 | 74.56 | 0.462 |
| Interference with enjoyment of life? | 3.53 | 37.29 | 0.716 |
| Feelings about symptoms persistent | 23.25 | 22.98 | 0.648 |
| Worry about heart attach/death | 2.47 | 15.72 | 0.481 |
NB: SAQ-CAN Seattle Angina Questionnaire Canadian version; The text in bold represents the factor loading names, while bold values indicate item floor and ceiling effects above 15%