Table 2 Floor, ceiling item ceiling effect and item-total correlation for SAQ-CAN items
From: Psychometric evaluation of a Canadian version of the Seattle Angina Questionnaire (SAQ-CAN)
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 |