PMC

Median distance traveled in miles from patient home to hospital where prostatectomy was performed.

Figure 4a. Geographic location, by zip code, of US hospitals with robots in 2010. (Not shown: There are two hospitals with robots in Alaska, both in the same zip code in Anchorage. There are two hospitals with robots in Hawaii, both in Honolulu but in different zip codes.)
Figure 4b. Geographic location, by zip code of hospitals with robots in NJ, NY, and PA in 2010.

Figure 1a. Total number of prostatectomies performed annually in NJ, NY, and PA, 2000–2009.
Figure 1b. Total number of hospitals performing prostatectomy each year in NJ, NY, and PA, 2000–2009. During this time period, there were roughly 590–600 acute care hospitals in the study area.

Relationship between hospital prostatectomy volume and robot acquisition.
Each dot represents a single hospital in a single year. Hospitals that acquired a robot during the study period are red. Those that never obtained a robot are blue. For the hospitals that acquired a robot, year 0 is the year that the robot was acquired. For the hospitals that never acquired a robot, year 2005 (midway through the study period) was designated as year 0. The fitted curves show the trends in prostatectomy volume.