Statistical Analysis
As per protocol,Lastly, a non-prespecified subgroup analysis was performed, assessing pressure differences in the intervention vs control group, stratified by ICU vs non-ICU care setting. This analysis was conducted because clinical process observation in the 2 care settings revealed substantial differences in nursing staffing between the 2 settings. It was felt that this difference between settings could lead to differential benefits of the intervention between settings. Two-sided Missing clinical data were dealt with by analyzing data using an as-treated approach. Missing pressure readings while the participant was not on the bed for short periods of time (eg, a few hours) during their monitoring were not incorporated into the analysis of the pressure readings. Participants who did not complete approximately 72 hours of monitoring or had technical problems with their pressure data files, as indicated in 