Introduction. The essence of nursing care is to improve treatment results, patient satisfaction, and decrease treatment costs. Aim. Presenting the factors determining the assessment of nursing care quality in acute hospitals. Material and method. The study included 2605 nurses working in 30 hospitals in Poland. The Work Environment Scale and an opinion questionnaire were used to collect the data. The analysis based on logistic regression model, generalised estimating equations, χ² test, and Mann-Whitney test. Results. Three in every four respondents evaluated the quality of nursing care as good. The assessment depended on the conditions of work, autonomy in providing care, patient information flow, patient safety, occurrence of adverse even...