Thursday, April 3, 2008

Echo Z-Score Cutoff Values Survey

So, you have your Z-Score. Now what?

Certainly, you can use it to dichotomize your findings into normal or abnormal. Possibly, you might use the z-score to further stratify your abnormal findings into mild, moderate, or severe (dilatation or hypoplasia)- which leads me to a couple of central questions, which may challenge some accepted practices:

  • what z-scores do you consider normal?
  • what z-scores do you consider as the thresholds for varying grades of abnormal?

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