Skip to main content

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
  1. 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%