Date of Award


Degree Type


Degree Name

Master of Science


Health and Rehabilitation Sciences


Dr. Dianne Bryant

Second Advisor

Dr. Steven MacDonald


We investigated patients’ ability to accurately recall their preoperative quality of life following hip replacement surgery. We randomized consecutive patients aged 55 years or older into two groups. At each assessment patients completed self-report questionnaires (group 1: 4-weeks preoperatively, day-of-surgery, 6-weeks and 3-months postoperatively, group 2: 6- weeks and 3 months postoperatively). At 6 weeks postoperatively, patients completed questionnaires based on their recollection of preoperative health status. 174 patients (mean age 71 years) participated. Agreement between actual and recalled data was excellent for disease-specific questionnaires (ICC range 0.86 to 0.88), and moderate for the generic health measures (ICC range 0.48 to 0.60). The use of recalled ratings had minimal effects on power and sample size. Patients undergoing total hip arthroplasty can recall their preoperative health status at 6 weeks postoperatively with sufficient accuracy, allowing investigators to improve the efficiency of data collection in this population, with minimal expected loss of statistical power.



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