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Table 1 Basic characteristics of the study object

From: Security and cost comparison of INR self-testing and conventional hospital INR testing in patients with mechanical heart valve replacement

   Headcount (Persons) Percentage (%)
Total   526 100.0
Gender Male 177 33.7
  Female 276 66.3
Geographic distribution Local 141 26.8
  Within Sichuan 368 70.0
  Outside Sichuan 17 3.2
Operation Type MVR 263 50.0
  AVR 91 17.3
  DVR 147 27.9
  TVR 12 2.3
  MVR + TVR 9 1.7
  DVR + TVR 4 0.8
Education level Elementary School or below 119 22.6
  Junior High School 239 45.4
  Senior High School or Poly-technical School 130 24.8
  Junior College or above 38 7.2
Monthly family income ≤238 Dollar 100 19.0
  >238 Dollar 426 81.0