Table 5.

Equations to Determine Upper Extremity Length and Circumference Based on Patient Height, Weight, Age, and Sex.

Measurement	Equation	R 2
R arm length	Y = 0.14 (height) + 0.28 (age) + 0.41 (sex)	0.90
L arm length	Y = 0.14 (height) + 0.28 (age) + 0.41 (sex)	0.90
R arm circumference	Y = 12.11 + 0.05 (weight) + 0.52 (sex) – 0.07 (age)	0.88
L arm circumference	Y = 12.10 + 0.05 (weight) + 0.50 (sex)	0.88
R forearm length	Y = 0.12 (height) + 0.01 (weight) + 0.25 (age)	0.93
L forearm length	Y = 0.12 (height) + 0.01 (weight) + 0.27 (age)	0.94
R forearm circumference	Y = 11.86 + 0.03 (weight)	0.90
L forearm circumference	Y = 11.90 + 0.03 (weight)	0.90

Note. Weight is expressed in kilograms; height, in centimeters; age, in years. R = right; L = left.