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Table 1 Survey practices and sample physicians

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

A: Number of survey practices and physicians by cohort
MRI acquisition year Number of practices Practices with >50 % physician ID match Number of physicians
Comparison    
 Without MRI thru 2010 442 265 1790
 2011-2013 23 19 220
 Total 465 284 2010
Treatment    
 2007 30 21 276
 2008 15 12 206
 2009 18 16 283
 Total 63 49 765
  1. Sources: AAOS Survey Data, 2012; CMS NPPES Downloadable File [39]; see text