Nationwide Estimation for Incidence at Birth of Congenital Polydactyly and Syndactyly in Korean.

Kim, Dohyun; Park, Sue Kyung; Kim, Dong Chul; Oh, Suk Joon; Yoo, Keun Young

Original Article

Journal of the Korean Society of Plastic and Reconstructive Surgeons 2003;30(1):24-32.
Published online January 1, 2003.

Nationwide Estimation for Incidence at Birth of Congenital Polydactyly and Syndactyly in Korean.

Dohyun Kim, Sue Kyung Park, Dong Chul Kim, Suk Joon Oh, Keun Young Yoo

¹Department of Plastic and Reconstructive Surgery, Hallym University College of Medicine, Korea.
²Department of Preventive Medicine, Konkuk University College of Medicine, Korea. suepark@kku.ac.kr
³Dr. Dong-Chul Kim Aesthetic & Burn Plastic Surgery, Korea.
⁴Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.

Abstract

INTRODUCTION: The aim was to estimate the incidence at birth of congenital polydactyly and syndactyly to use medical utilization database of the National Health Insurance Corporation in Korea. MATERIAL & METHOD: Base population are selected from the children born in 1994(n=728,515). The diseases were identified by disease code system; ICD-9 755(Other congenital limb-anomalies), ICD-10 Q69(Polydactyly), ICD-10 Q70(Syndactyly), ICD-10 Q66(Other congenital feet-deformities), ICD-10 Q74(Other upper limb-anomalies). The suspicious cases of polydactyly and syndactyly are selected from the base population with those criteria(n=3,497). The 669 cases, 16 university hospitals and 16 hospitals have been examined the name and location of anomaly through medical record review. The diagnostic accuracy by Disease-code system was calculated. The incidence rate at birth was estimated by the class of polydactyly/syndactyly, adjusted for the diagnostic accuracy. RESULT: The incidence per 100,000 birth are estimated; at hand, polydactyly, 93(95% confidence interval 86-100), syndactyly, 29(25-33), polysyndactyly, 13(11- 16); at foot, polydactyly, 40(36-45), syndactyly, 22(19-26), polysyndactyly, 14(12 - 17); at multifocal area(hand & foot), polydactyly, 1(0.6 -2), syndactyly, 2(0.9-3), polysyndactyly, 3(2 - 4).
CONCLUSION
These incidence rates may be underestimated and show the minimum incidence rates. The incidences must be discussed in comparison with incidences through registry or prospective follow-up study of congenital anomalies.

Keywords: Incidence; Polydactyly; Syndactyly; Polysyndactyly