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. 2022 Oct 31;11(4):e002044. doi: 10.1136/bmjoq-2022-002044

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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Self-Efficacy Scale results according to willingness to participate in a clinical trial. Total score (A), and dimensions related to effectiveness in adversity (B), social effectiveness (C) and initiation and persistence (D) were significantly higher in patients who accepted to participate in a clinical trial (group 1) as compared with patients who refused (group 2).