Human height declines after early adulthood. Trotter and Gleser used a formula to adjust for this decline based on the patient's age.

Sources of height estimates:

(1) historical records of early adult height

(2) estimates of height based on measurement of long bones or arm span


decline in height with age in cm =

= (0.06 * ((age in years) - 30)


age-adjusted height =

= (predicted height) - (decline in height)


If the previous height was taken after the age of 30, then


decline in height in cm since previous measurement =

= (0.06 * ((current age in years) - (age at previous height measurement)))



• Scoliosis, kyphosis, fracture, osteoporosis, contractures, and other diseases may cause a greater than expected decline in height.

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