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A population-based study of craniosynostosis
L R French1, I T Jackson, L J Melton
1Section of Chronic Disease and Environmental Epidemiology, Minnesota Department of Health, Minneapolis 55440.
Insights
This study determined the incidence of craniosynostosis in Olmsted County, Minnesota. The incidence for definite craniosynostosis was 3.1 per 10,000 births, and 13.6 per 10,000 for all cases.
Area of Science:
- Pediatric Epidemiology
- Craniofacial Surgery
- Genetics
Background:
- Craniosynostosis, the premature fusion of skull sutures, affects infant development.
- Accurate incidence data is crucial for understanding the condition's prevalence and impact.
- Previous estimates of craniosynostosis frequency vary, necessitating population-based studies.
Purpose of the Study:
- To establish the population-based incidence of craniosynostosis in Olmsted County, Minnesota.
- To compare observed rates with existing minimal and maximal estimates.
- To differentiate incidence based on case classification (definite vs. probable).
Main Methods:
- A population-based study identified cases of primary craniosynostosis in Olmsted County residents born between 1976 and 1985.
- Cases were defined as definite (surgical or radiographic confirmation) or probable (radiograph ordered due to concern).
- Incidence rates were calculated per 10,000 births and compared to prior estimates.
Main Results:
- The incidence of definite craniosynostosis was 3.1 per 10,000 births (95% CI, 0.4-5.8).
- The incidence for all cases (definite and probable) was 13.6 per 10,000 births (95% CI, 7.9-19.3).
- Observed rates were statistically consistent with previous low and high estimates, respectively.
Conclusions:
- This study provides reliable population-based incidence rates for craniosynostosis.
- The findings support the consistency of craniosynostosis occurrence with prior estimations.
- Distinguishing between definite and probable cases aids in refining epidemiological data.
Abstract:
A population-based study of the incidence of craniosynostosis was conducted among residents of Olmsted County, Minnesota, born between 1 January 1976 and 31 December 1985. This study included only those with primary craniosynostosis who were less than 5 years of age at the time of diagnosis. Cases of craniosynostosis were classified as definite or probable. Definite cases had craniectomies or radiographic evidence confirming craniosynostosis, while patients for whom there was enough concern about craniosynostosis to order a skull radiograph were classified as probable cases. With these definitions, the incidence of craniosynostosis in Olmsted County was 3.1/10,000 births for definite cases (95% CI, 0.4-5.8) and 13.6/10,000 for all cases combined (95% CI, 7.9-19.3). These rates were compared to non-population-based minimal and maximal estimates of craniosynostosis frequency, 4/10,000 births and respectively. The rate observed in this study for definite cases, 3.1/10,000 births, is statistically consistent with the previous low estimate (observed/expected ratio 0.8, 95% CI, 0.2-1.8), and the rate observed for all cases in this study, 13.6, is consistent with the high estimate (observed/expected ratio 1.4, 95% CI, 0.8-2.1). Differences between definite and probable cases in this study are presented, along with comparisons with recent population-based data.