1.
Sexual behaviour and HPV infections in 18 to 29 year old women in the pre-vaccine era in the Netherlands.
2.
Cervical intraepithelial neoplasia and the risk of spontaneous preterm birth: A Dutch population-based cohort study with 45,259 pregnancy outcomes.
Study flowchart.
Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guideline.
Univariable logistic regression for preterm birth per variable before each childbirth.
Logistic regression for preterm birth for women with no CIN, untreated CIN, and treated CIN before each childbirth.
Logistic regression for preterm birth per volume taken from the cervix before each childbirth.
Logistic regression for preterm birth per grade of CIN and volume taken from the cervix before each childbirth.
Logistic regression for maternal outcomes for women with no CIN, untreated CIN, and treated CIN before each childbirth.
Logistic regression for neonatal outcomes for women no CIN, untreated CIN, and treated CIN before each childbirth.