Ponderal index is:
(A) Square root of height in feet by weight in grams (B) Weight in kilograms by cube of height in meters (C) Mid-upper arm circumference to head circumference ratio (D) Head circumference to abdominal circumference ratio
(B) Ans: B. Weight in kilograms by cube of height in meters(Ref Dafiary Manual of Obstetrics 3/e p199)Ponderal Index:Calculated by multiplying weight in grams by hundred and then dividing by cube of length in cm.Ponderal index = Bih weight (gm)/ Length (cm)3 x 100Interpretation:Usually less than 2 in asymmetric growth retardation.2 or more in babies with normal growth or symmetric growth retardation.