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Open Access 01-12-2024 | Research

Epidemiology of congenital polydactyly and syndactyly in Hunan Province, China

Authors: Xu Zhou, Ting Li, Haiyan Kuang, Ying Zhou, Donghua Xie, Jian He, Juan Xiao, Chanchan Chen, Yurong Jiang, Junqun Fang, Hua Wang

Published in: BMC Pregnancy and Childbirth | Issue 1/2024

Abstract

Objective

To describe the prevalence and epidemiology of congenital polydactyly and syndactyly in Hunan Province, China, 2016–2020.

Methods

Data were obtained from the Birth Defects Surveillance System in Hunan Province, China, 2016–2020. Prevalence of birth defects (polydactyly or syndactyly) is the number of cases per 1000 births (unit: ‰). Prevalence and 95% confidence intervals (CI) were calculated by the log-binomial method. Chi-square trend tests (χ²_trend) were used to determine trends in prevalence by year. Crude odds ratios (ORs) were calculated to examine the association of each demographic characteristic with polydactyly and syndactyly.

Results

Our study included 847,755 births, and 14,459 birth defects were identified, including 1,888 polydactyly and 626 syndactyly cases, accounting for 13.06% and 4.33% of birth defects, respectively. The prevalences of total birth defects, polydactyly, and syndactyly were 17.06‰ (95%CI: 16.78–17.33), 2.23‰ (95%CI: 2.13–2.33), and 0.74‰ (95%CI: 0.68–0.80), respectively. Most polydactyly (96.77%) and syndactyly (95.69%) were diagnosed postnatally (within 7 days). From 2016 to 2020, the prevalences of polydactyly were 1.94‰, 2.07‰, 2.20‰, 2.54‰, and 2.48‰, respectively, showing an upward trend (χ²_trend = 19.48, P < 0.01); The prevalences of syndactyly were 0.62‰, 0.66‰, 0.77‰, 0.81‰, and 0.89‰, respectively, showing an upward trend (χ²_trend = 10.81, P = 0.03). Hand polydactyly (2.26‰ vs. 1.33‰, OR = 1.69, 95%CI: 1.52–1.87) and hand syndactyly (0.43‰ vs. 0.28‰, OR = 1.42, 95%CI: 1.14–1.76) were more common in males than females. Polydactyly (2.67‰ vs. 1.93‰, OR = 1.38, 95%CI: 1.26–1.51) and syndactyly (0.91‰ vs. 0.62‰, OR = 1.47, 95%CI: 1.26–1.72) were more common in urban areas than in rural areas. Compared to maternal age 25–29, hand polydactyly was more common in maternal age < 20 (2.48‰ vs. 1.74‰, OR = 1.43, 95%CI: 1.01–2.02) or ≥ 35 (2.25‰ vs. 1.74‰, OR = 1.30, 95%CI: 1.12–1.50).

Conclusion

In summary, we have described the prevalence and epidemiology of polydactyly and syndactyly from hospital-based surveillance in Hunan Province, China, 2016–2020. Our findings make some original contributions to the field, which may be valuable for future research.

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Title: Epidemiology of congenital polydactyly and syndactyly in Hunan Province, China
Authors: Xu Zhou
Ting Li
Haiyan Kuang
Ying Zhou
Donghua Xie
Jian He
Juan Xiao
Chanchan Chen
Yurong Jiang
Junqun Fang
Hua Wang
Publication date: 01-12-2024
Publisher: BioMed Central
Published in: BMC Pregnancy and Childbirth / Issue 1/2024
Electronic ISSN: 1471-2393
DOI: https://doi.org/10.1186/s12884-024-06417-y

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Springer Medicine

Epidemiology of congenital polydactyly and syndactyly in Hunan Province, China

Abstract

Objective

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objective

Methods

Results

Conclusion

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