Before revision:  Outcome measures including pain level, anxiety, depression, medication administration, sleep quality, heart rate, respiratory rate, blood pressure, delirium status, and patient ratings of the VR system were evaluated using paired t-tests and mixed models where appropriate.
After revision:  Outcome measures including pain level, anxiety, depression, medication administration, sleep quality, heart rate, respiratory rate, blood pressure, delirium status, and patient ratings of the VR system . Comparisons were made using paired t-tests and mixed models where appropriate.