Association between maternal hemoglobin concentration levels and preterm birth clinical subtypes: A retrospective, observational, multicenter study

• Peiran Chen ,

  Contributed equally to this work with: Peiran Chen, Yi Mu

  Roles Conceptualization, Formal analysis, Methodology, Writing – original draft

  Affiliation National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Yi Mu ,

  Contributed equally to this work with: Peiran Chen, Yi Mu

  Roles Formal analysis, Methodology, Writing – original draft

  Affiliation National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Yanxia Xie,

  Roles Methodology, Writing – original draft

  Affiliation National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Yanping Wang,

  Roles Writing – review & editing

  Affiliation National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Zheng Liu,

  Roles Writing – review & editing

  Affiliation National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Mingrong Li,

  Roles Data curation

  Affiliation National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Juan Liang ,

  Roles Conceptualization, Methodology, Writing – review & editing

  * E-mail: liangjuan@scu.edu.cn (JL); zhujun028@163.com (JZ)

  Affiliations National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China, Department of Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China

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• Jun Zhu

  Roles Conceptualization, Supervision, Writing – review & editing

  * E-mail: liangjuan@scu.edu.cn (JL); zhujun028@163.com (JZ)

  Affiliations National Office for Maternal and Child Health Surveillance of China, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, China

  https://orcid.org/0000-0001-9666-8010

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