Socio-economic maternal risk factors (low education, unemployment) and foreign nationality, whose risk ratios were 1.14 (95% CI: 1.04; 1.24), 1.08 (1.05; 1.12), and 1.17 (1.14; 1.21), respectively, showed a decreasing trend after pandemic; their impact on the decrease in PTBs was modest (PIFs between −2.4‰ and −4.2‰).
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Trends in Preterm Births in Italy and Maternal Risk Factors in 2018-2022-A Registry-Based Study.
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