Upper segment to lower segment ratio in 3 yr age child is ___________

.The U/L ratio (upper body segment :lower body segment) at bih is about 1.7; at age 3 years it is 1.3; at greater than 7 years, it is 1.0 with the upper body segment and lowerbody segment being about equal. Note : higher U/L ratios are noted in sho-limb dwarfism and other bone disorders such as rickets. Reference: GHAI Essential pediatrics, 8th edition