There was no birthregistry to fall back on; that end of it was neglected.
2
Our pooling was based on linked cancer and birthregistry records from New York, Washington, Minnesota, Texas, and California.
3
Information on birth characteristics was obtained from the population-based medical birthregistries.
4
Additional information was obtained through questionnaires and the Medical BirthRegistry.
5
Information on birth characteristics was obtained from national birthregistries.
6
Controls were selected from the Danish Medical BirthRegistry.
7
Data on pregnancy multivitamin intake were linked to the Medical BirthRegistry to identify the birth outcome.
8
The responses on multivitamin use were merged with the preeclampsia diagnosis from the Danish Medical BirthRegistry.
9
Methods: The Norwegian Mother and Child Cohort Study and Medical BirthRegistry of Norway data sets were used.
10
Birth outcomes were birth weight, low birth weight, gestational age, and preterm delivery obtained from the Medical BirthRegistry of Norway.
11
Methods: This population-based cohort study was based on data retrieved from the Medical BirthRegistry of Norway and the Norwegian Prescription Database.
12
Data from national cancer registries and birthregistries in Denmark, Sweden, Norway and Finland 1985-2006 was used.
13
Design: This cohort study was based on data from two nationwide databases: the Medical BirthRegistry of Norway and the Norwegian Prescription Database.
14
Methods: A population-based cohort study was conducted based on the linkage of nationwide registries: the Medical BirthRegistry of Norway and the Norwegian Prescription Database.
15
Methods: This was a population-based cohort study based on linkage of two nationwide registries: the Medical BirthRegistry of Norway, and the Norwegian Prescription Database.