The differential effect of foreign-born status on preterm birth: a Taiwan population-based birth registry study

Authors

  • L-C See,

    Corresponding author
    1. a Department of Public Health, College of Medicine and b Department of Occupational Therapy, Chang Gung University, Taoyuan, Taiwanc Health Promotion Section, Public Health Bureau of Taoyuan County, Taoyuan, Taiwan
      Dr L-C See, Department of Public Health, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan. Email lichu@mail.cgu.edu.tw
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  • a Y-M Shen,

    1. a Department of Public Health, College of Medicine and b Department of Occupational Therapy, Chang Gung University, Taoyuan, Taiwanc Health Promotion Section, Public Health Bureau of Taoyuan County, Taoyuan, Taiwan
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  • and b Y-J Lo c

    1. a Department of Public Health, College of Medicine and b Department of Occupational Therapy, Chang Gung University, Taoyuan, Taiwanc Health Promotion Section, Public Health Bureau of Taoyuan County, Taoyuan, Taiwan
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Dr L-C See, Department of Public Health, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan. Email lichu@mail.cgu.edu.tw

Abstract

Whether foreign-born status confers a protective effect on preterm birth in Taiwan was investigated using singleton live birth data from the 2004 Taiwan Birth Registry (n= 211 946). Newborns of foreign-born mothers (FBMs) comprised 13.7% of the population. The preterm birth rate of newborns of FBMs (5.9%) was significantly lower than that of newborns of Taiwan-born mothers (TBMs) (8.0%) (P < 0.0001). After having adjusted for predisposing maternal factors or adverse pregnancy conditions, newborns of FBMs still had a lower risk in preterm birth than that of TBMs, with an odds ratio of 0.74 and 95% confidence interval between 0.71 and 0.79. Selection was hypothesised to explain the low preterm birth rate in FBMs.

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