| Summary: | This study investigates the evidence supporting the impact of the built environment on the health outcomes for patients within the hospital setting. Improving the hospital environment may potentially impact the lives of millions of patients, patients' family, and staff. Prior research has suggested that the built environment can contribute to positive health outcomes. Reporting the most recent evidence may assist designers in making informed decisions. In this study, a literature review was conducted using the PICO framework within scientific databases and additional hand-searched documents. A total number of 15 articles were included. Effects of each environmental factor on patients' health outcomes were discussed in detail. Environmental factors that affect patient outcomes are (1) form, (2) unit layout, (3) floor material, (4) room features, (5) medical equipment visibility, (6) nature, (7) lighting, and (8) music. Although several studies have provided a high level of evidence, other studies have lacked a robust research design. Thus, evidence regarding several environmental factors is not conclusive. Additional studies using experimental/quasi-experimental research design have been suggested. In some studies, several environmental factors were introduced simultaneously which obscured the separate effects of each environmental factor.
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