Epidemiological statistics of congenital thumb duplication in the Chinese population

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Abstract

Background: Thumb duplication is a very common congenital malformation. This study describes and compares the phenotypic manifestations of polydactyly between southwest and northeast China. However, previous studies had a limited sample size. Therefore, this study used a large sample. Methods: A total of 3549 well-characterized thumb duplication cases were divided into group A (southwest China) and group B (northeast China). Results: In group A and group B, the left-to-right ratio was 1:1.5 and 1:1.75, respectively, and the female-to-male ratio was 1:1.5 and 1:1.58, respectively. Conclusions: There were no significant differences in gender distribution or the distribution of left and right polydactyly between the two groups, but the distribution of bilateral polydactyly was significantly different.

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Yao, Y., Zhou, H., Li, L., & Nan, G. (2021). Epidemiological statistics of congenital thumb duplication in the Chinese population. Journal of Orthopaedic Surgery and Research, 16(1). https://doi.org/10.1186/s13018-021-02567-3

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