Table 3: Difference in GM muscle length between paretic and typically developing children.

Non Paretic Paretic
Age GM-Muscle
length(cm) 		Age GM-Muscle
length (cm) 		Difference in length (cm)
4 12 3.1 8.6 3.4
6 14.1 5.6 10.7 3.4
7 17.7 2.8 8.3 9.4
8 18.2 8.3 12.1 6.1
8 15.1 8.3 11.8 3.3
9 15.9 9.3 12 3.9
9 20.4 9.3 13 7.4
13 22.5 13.1 18.5 4
13 18.2 13.4 15 3.2
14 21.1 14.1 13.7 7.4

Our simple formula Fig. (1) can be used in di/hemiplegic patients to calculate the ratio/percentage of GM muscle length in comparison to the leg length (Table 4). The average of these ratios is 44.9%.