A Time Motion Study Evaluating the Impact of Geographic Cohorting of Hospitalists
BACKGROUND: Geographic cohorting (GCh) localizes hospitalists to a unit. Our objective was to compare the GCh and non-GCh workday.
METHODS: In an academic, Midwestern hospital we observed hospitalists in GCh and non-GCh teams. Time in patient rooms was considered direct care; other locations were considered ‘indirect’ care. Geotracking identified time spent in each location and was obtained for 17 hospitalists. It was supplemented by in-person observation of four GCh and four non-GCh hospitalists for a workday each. Multilevel modeling was used to analyze associations between direct and indirect care time and team and workday characteristics.
RESULTS: Geotracking yielded 10,522 direct care episodes. GCh was associated with longer durations of patient visits while increasing patient loads were associated with shorter visits. GCh, increasing patient loads, and increasing numbers of units visited were associated with increased indirect care time. In-person observations yielded 3,032 minutes of data. GCh hospitalists were observed spending 56% of the day in computer interactions vs non-GCh hospitalists (39%; P < .005). The percentage of time spent multitasking was 18% for GCh and 14% for non-GCh hospitalists (P > .05). Interruptions were pervasive, but the highest interruption rate of once every eight minutes in the afternoon was noted in the GCh group.
CONCLUSION: GCh may have the potential to increase patient–hospitalist interactions but these gains may be attenuated if patient loads and the structure of cohorting are suboptimal. The hospitalist workday is cognitively intense. The interruptions noted may increase the time taken for time-intensive tasks like electronic medical record interactions.
© 2019 Society of Hospital Medicine
In-person Observations
Four hospitalists cohorted to general medical units and four non-GCh hospitalists were observed for one day each, yielding a total of 3,032 minutes of data. These hospitalists were on teams without residents or APPs. On average, GCh hospitalists had 78% of their patients on their assigned unit, rounded on fewer units (3 vs 6) and had two more patients at the start of the day than non-GCh hospitalists (14 vs 12). Age and gender distribution of the GCh and non-GCh hospitalists were similar.
As a percentage of total observed time, GCh hospitalists were noted to spend a larger proportion of the workday in computer interactions vs non-GCh hospitalists (56% vs 39%; P = .005). The proportion of time in other activities or locations was not statistically different between GCh and non-GCh hospitalists, including face-to-face communication (21% vs 15%), multitasking (18% vs 14%), time spent at the nursing station (58% vs 34%), direct care (15% vs 20%), and time traveling (4% vs 11%). The most frequently observed combination of multitasking was computer and phone use (59% of all multitasking) followed by computer use and face-to-face communication (17%; Appendix Figure 2).
The mean duration of an interruption was 1.3 minutes. More interruptions were observed in the GCh group than the non-GCh group (139 vs 102). Interruptions in the GCh group were face-to-face in 62% of instances and electronic in 25%. The remaining 13% were instances in which electronic and face-to-face interruptions occurred simultaneously. In the non-GCh group, 51% of interruptions were face-to-face; 47% were electronic; and 2% were simultaneous. GCh hospitalists were interrupted once every 14 minutes in the morning, with interruption frequency increasing to once every eight minutes in the afternoon. Non-GCh hospitalists were interrupted once every 13 minutes in the morning and saw interruption frequency decrease to once every 17 minutes in the afternoon. The task most frequently interrupted was computer use.
DISCUSSION
Previous investigations have studied the impact of cohorting on outcomes, including the facilitation of bedside rounding, adverse events, agreement between nurses and physicians on the plan of care, productivity, and the number of pages received.13-16 Cohorting’s benefits are theorized to include increased hospitalist time with patients, while its downsides are perceived to include increased interruptions.17,18 Neither has previously been evaluated by direct observation.
Our findings support cohorting’s association with increased hospitalist–patient time. While GCh hospitalists were observed spending 5% less time in direct care than non-GCh hospitalists by in-person observations, this difference did not achieve statistical significance and was unadjusted for hospitalist, patient load, team or patient characteristics. Using the larger badge dataset, the predicted values for time spent in direct care encounters were higher in cohorted teams. Pairwise comparisons consistently trended toward longer durations in cohorted vs noncohorted teams. The notable exception was in cohorted teams with residents, which had the shortest predicted patient visits; however, we did not have noncohorted teams with residents in our study, limiting interpretation. Additionally, the odds of repeat visits to a patient in a single day were almost twice as high in the cohorted vs noncohorted group. The magnitude of this gain, however, is estimated to be a modest 1.2 minutes for a hospitalist only team and 1.7 minutes for a hospitalist with APP team and may be insufficient to provide compassionate, patient-centered care.19
Furthermore, these gains may be eroded if patient loads are high: similar to a previous study, we found that the duration of each patient visit decreased by 14% when the load increased from 10 to 20 patients.6 The expected gains in efficiency from cohorting leads to an expectation that hospitalists can manage more patients, but such reflexive increases should be carefully considered.18
Similar to earlier investigations where hospitalists were found to spend 60 to 69% of the day in indirect care activities,5,6 hospitalists in both cohorted and noncohorted models spent approximately three times more time in indirect than direct care. Cohorting was associated with increased indirect care time. This association was expected as interdisciplinary huddles and increased nursing and physician communication are both related to cohorting.3,14 However, similar to previous reports, in-person observations revealed that the bulk of this indirect time was spent in computer interactions, rather than in interprofessional communication. Interactions with the electronic health record (EHR) consume between one-third to one-half of the day in inpatient settings.20,21 While EHRs are intended to enhance safety, they also fulfill multiple, nonclinical purposes and increase time spent on documentation.22,23 Nonclinical tasks may contribute to clinician burnout and detract from patient centeredness.22 Our findings suggest that cohorting may not offset the burden of these time-intensive EHR tasks. The larger expenditure of time spent in computer interactions observed in the GCh group may be partially explained both by the higher number of patients and the higher frequency of interruptions observed in this group; computer use was the task most frequently observed to be interrupted. While longer tasks are more likely to be interrupted, the interruption in turn further increases the time taken to complete the task.24
The interruption rates we observed are concerning. The hospitalist workday emerges as cognitively intense. GCh hospitalists were noted to be interrupted as frequently as once every eight minutes, a rate more than double that of an earlier investigation and approaching that of ED physicians.5,25,26 Interruptions and multitasking contribute to errors and a perception of increased workload and frustration for clinicians.9,27-29 Although interruptions were pervasive, GCh hospitalists were interrupted more frequently, corroborating a national survey in which hospitalists perceived that cohorting increased face-to-face interruptions.30 The prolonged availability of the cohorted hospitalist on the unit may require different strategies for promoting timely interactions while preserving uninterrupted work time. Our work, however, does not allow us to quantify appropriate and urgent interruptions that reflect improved teamwork and patient safety. Interruptions increase as patient loads increase.25 The contribution to interruptions by the higher patient census on the GCh teams cannot be quantified in this work, but without attention to these details, potential benefits from GCh may be attenuated.
Previous work has delineated variables important in determining hospitalist workload,31 and our work contributes additional considerations. Hospitalist experience and resident presence on cohorted teams was associated with shorter patient visits, while ED encounters were predicted to be the most time intensive. Increasing numbers of units visited in a day was associated with more indirect time, while weekends were associated with a lower burden of indirect care. As expected, APP presence was associated with more time in indirect care as the hospitalist spends time in providing oversight. As noted, cohorting was associated with increases in both direct and indirect care time. These findings may help inform hospital medicine groups. Additionally, attention should be paid to the fact that while support for cohorting stems from investigations in which it was used as part of a bundle of interventions,2,3 in practice, it is often implemented incompletely, with cohorted hospitalists dispersed over several units, or in isolation from other interventions.1
Our work has several limitations. As a single-center investigation, our findings may not be generalizable to other institutions. Second, we did not evaluate clinical outcomes, clinician, patient or nursing satisfaction to assess the effect of cohorting. Third, we cannot comment on whether the observed interruptions were beneficial or detrimental. Finally, while we used statistical control for the measured imbalanced variables between groups, unmeasured confounding factors between team types including differences in patient populations, pathologies and severity of illness, or the unit’s work environment and processes may have affected results.
Our work underscores the importance of paying careful attention to specific components and monitoring for unintended consequences in a complex intervention such as cohorting to allow subsequent refinement. Further studies to assess the interplay between models of care, their impact on interruptions, multitasking, errors and clinician burnout may be necessary. Such investigations will be critical to support the evolution of hospital medicine that enables it to be the driver of excellence in care.
