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Background
Little is known about the long‐term trends of preterm birth rates in China and their geographic variation by province.
Objectives
To estimate the annual spatial–temporal distribution of preterm birth rates in China by province from 1990 to 2020.
Data Sources
We searched PubMed, EMBASE, Web of Science, CNKI, WANFANG and VIP from January 1990 to September 2023.
Study Selection and...