Methods
Design and sample
Written permission was obtained from the author of the tool on 11 January 2008 to use the tool in the research. Study approval was obtained from the Ethics Committee of Ege University School of Nursing and the hospital that participated in the study. All patients who participated in the research were informed about the research and informed that they could withdraw from the research at any time they wanted to do so. The sample of this methodological study included 160 patients with leukaemia who were admitted at the haematology unit of a university hospital. All patients were diagnosed by an oncologist as having pain because of leukaemia. The inclusion criteria were patients with leukaemia admitted to the haematologyunit of a university hospital from February 2009 to March 2010, older than 18 years, were able to express pain, with cognitive conditions that permitted participation and agreeing to participate in the study by signing the informed consent form.