Updates are available Correction dated 2021-12-27

Article History

Received: 14 September 2020

Accepted: 28 October 2021

First Online: 19 November 2021

Change Date: 27 December 2021

Change Type: Correction

Change Details: A Correction to this paper has been published:

Change Details: https://doi.org/10.1186/s12884-021-04312-4

Declarations

:

: The ethics approval to undertake this study was provided by School of Nursing, Yangzhou University (Audit reference YZUHL2020014) on 1 March 2020. The department of obstetrics and gynecology of Subei People’s Hospital granted permission. The data were based on case records and were merely an assessment of the quality of clinical obstetric care in this study, so informed consent was not required.

: Not applicable.

: The authors declare that they have no competing interests.