Different pathways for preterm birth between singleton and twin pregnancies: a population-based registry study of 481 176 nulliparous women.

ABSTRACT:

Objective

To explore the contribution of pregnancy-related complications on the prevalence of extremely, very and late preterm births in singleton and twin pregnancies. To study the risk of spontaneous preterm birth in twin pregnancies compared with singleton pregnancies.

Design

Population-based registry study.

Setting

Medical birth registry of Norway and Statistics Norway.

Population

Nulliparous women with singleton (n = 472 449) or twin (n = 8727) births during 1999-2018.

Methods

Prevalence rates of pregnancy-related complications for extremely, very and late preterm birth in twin and singleton pregnancies were calculated with 95% confidence intervals. Multivariable logistic regression was applied to assess odds ratios for preterm birth, adjusted for o

SUBMITTER: Tingleff T 

PROVIDER: S-EPMC10099984 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature