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Table 4 Prevalence of Total PTB, spontaneous PTB, and indicated PTB by maternal country of origin among Black women with GDM In California, 2013–2017, N = 8609

From: Preterm birth and nativity among Black women with gestational diabetes in California, 2013–2017: a population-based retrospective cohort study

Country of origin Number of mothers Total PTB
n (row%)
p value
All 8609 1148 (13.3) p < 0.0001
U.S. 7222 1024 (14.2)
Ethiopia 346 24 (6.9)
Nigeria 246 25 (10.2)
Somalia 120 10 (8.3)
Eritrea 91 a
Ghana 68 8 (11.8)
Other 516 53 (10.3)