Abstract
A clinico-statistical investigation was carried out on 1356 patients hospitalized in our clinic between 1973-1984 having cleft lip and/or cleft palate. Comparing with the previous report of Sanui (1962) surveying about 2519 clefts, the following results were obtained.
1. Distribution of cleft types was similar.
2. In cleft lip patients (CL), the sex ratio has differed, in which male patients have significantly increased from 46.4 % to 61.2 %.
3. The ratio of bilateral type of cleft lip with cleft palate (CLP) have become slightly higher.
4. The occurring sides were similar.
5. Complications of other abnormalities have increased in CLP and cleft palate (CP).
6. The rate of consanguineous marriage among parents of patients in this survey was similar to that of general population.
7. The recurrence rate of similar abnormalities among sibs of propositi has slightly increased in CP.
8. The mother's age at delivery was found in larger number to be at older than 35 years old in CLP, and at younger than 24 years and older than 35 years in CP.
9. Seasonal trend was observed with the peak in winter. The observation was obtained from the CL relative to general population. However, the seasonl effect was weak.
