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Table 5 Summary of estimated coefficient for “Onsite MRI” for alternative measures of the difference in medicare MRI volume and alternative provider samples

From: In-office magnetic resonance imaging (MRI) equipment ownership and MRI volume among medicare patients in orthopedic practices

MRI volume change measure Principal provider sample (N = 433) Confirmed provider sample (N = 371)
  “Onsite MRI” p-value “Onsite MRI” p-value
∆MRIs as % Visits −0.468 0.161 −0.604 0.273
∆Ortho MRIs as % Visits −0.399 0.210 −0.787 0.128
∆Number of MRIs 2.165 0.420 1.591 0.310
∆Number of Ortho MRIs 0.102 0.977 0.152 0.507
  1. Sources: see tex