Samples are randomly divided into two groups of test and control using minimization software. The minimization software divides the samples into groups in such a way that there is at least a difference between them. Variables to be included in the software include age, gender, marital status, pregnancy, number of children, home care for the elderly, level of education, employment status, shift work, number of night shifts per month, number of shifts during the holidays, nurse ratio To the patient, Work experience, ICU work experience, employment in another hospital, overtime hours, history of chronic illness, job interest, body mass index and income level.