Page 4 - PowerPoint Presentation

Epidemiology of cleft lip

and palate

 Average incidence of cleft lip is

1:1000 live births.

 Cleft lip is more common in males

with 2:1 ratio (male : female)

 It is more common in Asians.

African: 1:2000

White: 1:750

Asian: 1: 500

 The proportion of cleft lip cases

involving left, right and both sides are

6:3:1.

Left diagram: Left incomplete cleft lip

Right diagram : Bilateral incomplete cleft lip