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5. Grading

When diagnosing anterolisthesis, doctors will assign a grade related to the degree of the slippage. Grade I is the most common, accounting for around 75% of all spondylolisthesis cases. The grades are

  • Grade I: 0% to 25% of slippage
  • Grade II: 25% to 50%
  • Grade III: 50% to 75%
  • Grade IV: 75% to 100%

Some doctors recognize a fifth grade, representing slippage greater than 100%.

doctor spine scan Cecilie_Arcurs / Getty Images

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