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Table 3 Exploratory factor analysis of SAQ before removal of failed Items

From: Psychometric evaluation of a Canadian version of the Seattle Angina Questionnaire (SAQ-CAN)

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
  1. 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