Clinicostatistical Observations of Cleft Lip and/or Palate Patients in Department of Oral and Maxillofacial Surgery, University of the Ryukyus Hospital

Primary cases

Abstract

Cleft lip and/or palate patients of our department for the past 17 years since its establishment (January 1989) were analyzed statistically.
The results were as follows:
1. The total number of primary cases was 501.
2. They consisted of 146 (29.4%) cleft lips,200 (40.3%) cleft lip and palates, and 150 (30.2%) cleft palates.
3. Cleft lip and cleft palate were more frequent in males and cleft palate in females.
4. The laterality in CL and CLP cases was unilateral in 77.8% and bilateral in 22.2%. Left laterality (1.8 1) was observed in unilateral cases.
5. Among the patients,488 patients (97.4%) were residents of Okinawa prefecture.
6. As for gestational age, full term birth accounted for 88.0%.
7. The incidence of low-weight babies (less than 2,500g) amounted to 16.2% of the patients, which was higher than in normal cases.
8. The mean age of mothers at delivery was similar to that of the normal group.
9. As for the childbirth state, natural childbirth was often found.
10. Associated congenital anomalies were found in 18.4% of all cases, and they were more frequently found in cleft palate patients.