A cephalometric study of 500 adult male medical students of Uttar Pradesh.

Various measurements of the head and face were made on 500 male medical students of the S.N. College, Agra (India) and the possible indices were calculated. The regression lines were calculated between the nasal index and the upper facial index as well as between nasal index and the total facial index. A significant correlation was found between the above three indices. A formula was derived, by which if one index is known the other can be calculated.