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Calculation of Growth Delay

See Also
1. Failure to Thrive
Step 1: Calculate Final Height prediction
1. Boy
  1. In: (Father's Height + Mother's Height + 5) / 2
  2. Cm: (Father's Height + Mother's Height + 13) / 2
2. Girl
  1. In: (Father's Height - 5 + Mother's Height) / 2
  2. Cm: (Father's Height - 13 + Mother's Height) / 2
Step 2: Identify Predicted Growth Percentile
1. Use above predicted mean height to mark growth chart
  1. Mark chart at 18 year old mark
  2. Mark Confidence Intervals
    1. Mean Height in inches +/- 3.3 inches
    2. Mean Height in centimeters +/- 8.3 centimeters
2. Identify growth percentiles for the predicted height
Step 3: Indications for growth delay evaluation
1. Child over age 2 should fall into above percentiles
2. Pursue growth evaluation for any child below minimum

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This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 6/1/2008. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.