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Updated: Aug 5, 2026

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一种灵活的方法来利用处于风险的胎儿来建模死胎

Jeffrey N Bone1,2, K S Joseph1,3, Sid John1

  • 1Department of Obstetrics and Gynaecology, University of British Columbia and the Children's and Women's Hospital and Health Centre of British Columbia, Vancouver, British Columbia, Canada.

Paediatric and perinatal epidemiology
|June 24, 2023
PubMed
概括

分量指数添加混合模型 (PAMM) 为分析死产风险提供了可克斯模型的灵活替代方案,特别是当不符合比例危险假设时. 这些模型提供了对诸如BMI和整个妊娠年龄的吸烟等因素的细微见解.

关键词:
考克斯模型 考克斯模型处于危险中的胎儿零碎添加剂混合模型的混合模型.生存分析,生存分析.

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Carbon Skeletons01:12

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Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...