Description and transition in pressure ulcer-related content in nursing textbooks published continuously from the inception of the New System

Using a text-mining survey of basic nursing textbooks published in Japan from 1951 to 2019, the present study aimed to identify the description and transition in pressure ulcer-related content in nursing textbooks. Descriptions of pressure ulcer were converted into text data which were then separated into components, categorized, and quantified to examine the ratio and changes per category. The Jonckheere-Terpstra test was conducted after dividing the category volume by the number of textbooks by publication period. Correspondence analysis was carried out using the publication period and category. The results of a trend test for the categories of quantity, evaluation, wound surface, rehabilitation, necrotic tissue, competence, and burns was significant and were classifiable into the following five items and percentages: movement support（51.4%）, skin and wound management（18.7%）, nursing（10.7%）, whole body management（9.8%）, and environmental maintenance （9.4%）. Correspondence analysis revealed that the textbook content in the period from the 1950s to the 1960s was characterized by a focus on observation and local irritation. In the 1950s, drying was emphasized. The 1970s to 1980s was characterized by a focus on the details of body parts, positional and postural change, and bedding whereas the focus in the 1990s to the 2010s was on multiple approaches to the wound healing process. More than 50% of the content related to pressure ulcers in nursing textbooks was movement support. Recently, multifaceted, and comprehensive content has been characterized with emphasis on evaluation.