Just by casual observation, I have asserted that a hospital was more
likely to acquire a surgical robot if a nearby competitor hospital had already done so. But this was an untested conclusion, based on viewing websites and highway signs, particularly from community hospitals, like
above. So I was intrigued to see this
great article by Huilin Li (Department of Population Health, New York University) and others in
Healthcare. From the abstract:
Background
The surgical robot has
been widely adopted in the United States in spite of its high cost and
controversy surrounding its benefit. Some have suggested that a “medical
arms race” influences technology adoption. We wanted to determine
whether a hospital would acquire a surgical robot if its nearest
neighboring hospital already owned one.
Methods
We
identified 554 hospitals performing radical prostatectomy from the
Healthcare Cost and Utilization Project Statewide Inpatient Databases
for seven states. We used publicly available data from the website of
the surgical robot's sole manufacturer (Intuitive Surgical, Sunnyvale,
CA) combined with data collected from the hospitals to ascertain the
timing of robot acquisition during year 2001 to 2008. One hundred thirty
four hospitals (24%) had acquired a surgical robot by the end of 2008.
We geocoded the address of each hospital and determined a hospital's
likelihood to acquire a surgical robot based on whether its nearest
neighbor owned a surgical robot. We developed a Markov chain method to
model the acquisition process spatially and temporally and quantified
the “neighborhood effect” on the acquisition of the surgical robot while
adjusting simultaneously for known confounders.
Results
After adjusting for
hospital teaching status, surgical volume, urban status and number of
hospital beds, the Markov chain analysis demonstrated that a hospital
whose nearest neighbor had acquired a surgical robot had a higher
likelihood itself acquiring a surgical robot (OR=1.71, 95% CI:
1.07–2.72, p=0.02).
Conclusion
There
is a significant spatial and temporal association for hospitals
acquiring surgical robots during the study period. Hospitals were more
likely to acquire a surgical robot during the robot's early adoption
phase if their nearest neighbor had already done so.