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Epidemiology of Cleft Lip and Cleft Palate in Pakistan

Clinical and epidemiologic studies of defined geographic populations can serve as a means of establishing data important for the diagnosis, treatment, and counseling of patients with cleft lip and cleft palate. Several descriptive epidemiologic studies have been carried out in many countries worldwide; however, no such study has ever been performed in Pakistan. Population-based data on the incidence of cleft lip and palate were obtained from birth registry information in northern Pakistan. A total of 117 cases from 61,156 live births reported were identified. The incidence for cleft lip and/or cleft palate was 1.91 per 1000 births (one per 523 births). Cleft lip alone (42 percent) was noted more frequently than isolated cleft palate (24 percent) and combined cleft lip and palate deformities (34 percent). Boys were more commonly affected by cleft lip and cleft lip with cleft palate, whereas girls predominated in the isolated cleft palate cases. Consanguineous marriages were observed in 32 percent of parents versus 18 percent in matched controls. Only 32 percent of cleft mothers received formal prenatal counseling, monthly examinations, and regular laboratory testing during the entirety of the pregnancy. Nutritional and vitamin supplements were given to only 28 percent of mothers of cleft children versus 59 percent in matched controls. Descriptive statistics were used to assess pertinent risk factors associated with cleft lip and palate. The acquisition of incidence and associated data has generated baseline information on the magnitude of cleft lip and cleft palate in Pakistan. It is hoped that this information can be used for appropriate resource use, cleft lip and cleft palate prevention programs, and counseling programs with Pakistan-specific data.