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. 2022 May 27;21:130. doi: 10.1186/s12912-022-00910-5

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — Schematic presentation of sampling technique in the selected public and private hospitals with cardiac center in Addis Ababa Ethiopia 2021 (the numbers in the brackets represents, the total number of cardiac nurses in respective hospitals, or group of hospitals (public or private) and the numbers in the boxes represents the total number of nurses included in the study from respective hospitals after proportional allocation is made. And 163 shows the total number of potential study participants). Key;—AA: Addis Ababa, CCE: Cardiac Center Ethiopia, TASH: Tikur Anbessa Specialized Hospital, SPH: St. Peter Hospital, GH: Gesund Hospital, LMH: Land Mark Hospital, ACH: Addis Cardiac Hospital