RT Journal Article
SR Electronic
T1 Communicating risk using absolute risk reduction or prolongation of life formats: cluster-randomised trial in general practice
JF British Journal of General Practice
JO Br J Gen Pract
FD British Journal of General Practice
SP e199
OP e207
DO 10.3399/bjgp14X677824
VO 64
IS 621
A1 Charlotte Gry Harmsen
A1 Ivar Sønbø Kristiansen
A1 Pia Veldt Larsen
A1 Jørgen Nexøe
A1 Henrik Støvring
A1 Dorte Gyrd-Hansen
A1 Jesper Bo Nielsen
A1 Adrian Edwards
A1 Dorte Ejg Jarbøl
YR 2014
UL http://bjgp.org/content/64/621/e199.abstract
AB Background It is important that patients are well-informed about risks and benefits of therapies to help them decide whether to accept medical therapy. Different numerical formats can be used in risk communication but It remains unclear how the different formats affect decisions made by real-life patients. Aim To compare the impact of using Prolongation Of Life (POL) and Absolute Risk Reduction (ARR) information formats to express effectiveness of cholesterol-lowering therapy on patients’ redemptions of statin prescriptions, and on patients’ confidence in their decision and satisfaction with the risk communication. Design and setting Cluster-randomised clinical trial in general practices. Thirty-four Danish GPs from 23 practices participated in a primary care-based clinical trial concerning use of quantitative effectiveness formats for risk communication in health prevention consultations. Method GPs were cluster-randomised (treating practices as clusters) to inform patients about cardiovascular mortality risk and the effectiveness of statin treatment using either POL or ARR formats. Patients’ redemptions of statin prescriptions were obtained from a regional prescription database. The COMRADE questionnaire was used to measure patients’ confidence in their decision and satisfaction with the risk communication. Results Of the 240 patients included for analyses, 112 were allocated to POL information and 128 to ARR. Patients redeeming a statin prescription totalled six (5.4%) when informed using POL, and 32 (25.0%) when using ARR. The level of confidence in decision and satisfaction with risk communication did not differ between the risk formats. Conclusion Patients redeemed statin prescriptions less often when their GP communicated treatment effectiveness using POL compared with ARR.