Background
Despite the known benefits of ambulation, most hospitalized patients remain physically inactive. One possible approach to this problem is to employ Ambulation Orderlies (AOs) – employees whose main responsibility is to ambulate patients throughout the day. For this study, we examined an AO program implemented among post-cardiac surgery patients and its effect on patient outcomes.
Methods
We evaluated post-operative length of stay, hospital complications, discharge disposition, and 30-day readmission for all patients who underwent coronary artery bypass and/or cardiac valve surgery in the nine months before and after the introduction of the AO program. In addition to pre-post comparisons, we performed an interrupted time series analysis to adjust for temporal trends and differences in baseline characteristics.
Results
We included 447 and 478 patients in the pre- and post-AO intervention groups, respectively. Post-operative length of stay was lower in the post-AO group, with median (IQR) of 10 (7,14) days versus 9 (7,13) days (p<0.001), and also had significantly less variability in mean monthly length of stay (Levene’s test p=0.03). Using adjusted interrupted time series analysis, the program was associated with a decreased mean monthly post-operative length of stay (-1.57 days, p=0.04), as well as a significant decrease in the trend of mean monthly post-operative length of stay (p=0.01). Other outcomes were unaffected.
Conclusion
The implementation of an AO program was associated with a significant reduction in post-operative length and variability of hospital stay. These results suggest that an AO program is a reasonable and practical approach towards improving hospital outcomes.