R Fuller1, N Dudley, J Blacktop. 1. Department of Elderly Medicine, Huddersfield Royal Infirmary, Acre Street, Lindley, Huddersfield HD3 3EW, UK. ftworf@aol.com
Abstract
OBJECTIVE: To determine older people's understanding of probability and risk information, and the impact of pictorial representation of risk. DESIGN: A researcher-administered questionnaire. SUBJECTS: 50 inpatients aged > or =75 years on elderly medicine wards at Huddersfield Royal Infirmary, Huddersfield, UK. RESULTS: Older people understand percentage probability better than fractional probability, and a wide range of incorrect responses indicated significant over- and underestimation of probabilities. Visual data about percentages were well received and understood, and were perceived as a good idea by participants. CONCLUSIONS: We have demonstrated a wide variation in understanding of risk and probability information by older people, with over- and underestimations of probability, along with confusion between fractional and percentage probability. Pictorial representation of probability was well understood. It could be developed as a simple, yet powerful communication tool to be used in daily clinical practice to help older people understand information on risks and benefits when making decisions about treatment choices.
OBJECTIVE: To determine older people's understanding of probability and risk information, and the impact of pictorial representation of risk. DESIGN: A researcher-administered questionnaire. SUBJECTS: 50 inpatients aged > or =75 years on elderly medicine wards at Huddersfield Royal Infirmary, Huddersfield, UK. RESULTS: Older people understand percentage probability better than fractional probability, and a wide range of incorrect responses indicated significant over- and underestimation of probabilities. Visual data about percentages were well received and understood, and were perceived as a good idea by participants. CONCLUSIONS: We have demonstrated a wide variation in understanding of risk and probability information by older people, with over- and underestimations of probability, along with confusion between fractional and percentage probability. Pictorial representation of probability was well understood. It could be developed as a simple, yet powerful communication tool to be used in daily clinical practice to help older people understand information on risks and benefits when making decisions about treatment choices.
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