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TABLE 2:

Comparison of states with high and low numbers of interventional neuroradiologists

No. of Interventional NeuroradiologistP Value
≥10<10
No. of states1629
Population*11,616,000 ± 7,738,0002,730,550 ± 1,991,000<.001
Population per interventional neuroradiologist662,000 ± 166,000837,000 ± 413,000.05
Population per institute1,164,000 ± 312,0001,121,000 ± 461,000.7
  • Note.—Data are the mean ± standard deviation unless otherwise specified.

  • * Population is significantly greater in the group of states where ≥10 or more interventional neuroradiologists practice than the group of states where ≤10 practice (P < .001, Student t test).