Author's accepted version (post-print).This is the peer reviewed version of the following article: Rashvand, F., Ebadi, A., Vaismoradi, M., Salsali, M., Yekaninejad, M.S., Griffiths, P. & Sieloff, C. (2016). The assessment of safe nursing care: development and psychometric evaluation. Journal of Nursing Management, which has been published in final form at http://dx.doi.org10.1111/jonm.12424. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-820227.html).The more accurate data of this study can be found in the finally published version.