Neighbourhood family income and adverse birth outcomes among singleton deliveries.

Objective: to assess the association between neighbourhood family income and adverse birth outcomes.

Methods: we conducted a retrospective cohort study of 334 231 singleton births during 2004 and 2006 based on the Niday Perinatal Database from Ontario. Median neighbourhood family incomes from the 2001 Canadian census were linked with the Niday Perinatal Database by dissemination areas.

A method for managing re-identification risk from small geographic areas in Canada.

Background: A common disclosure control practice for health datasets is to identify small geographic areas and either suppress records from these small areas or aggregate them into larger ones. A recent study provided a method for deciding when an area is too small based on the uniqueness criterion. The uniqueness criterion stipulates that an the area is no longer too small when the proportion of unique individuals on the relevant variables (the quasi-identifiers) approaches zero.

Social disparity and the use of intrapartum epidural analgesia in a publicly funded health care system.

Objective: We sought to examine the difference in use of labor epidural analgesia among women from different neighborhood socioeconomic groups.

Study Design: Neighborhood socioeconomic variables from the 2001 Canadian Census were linked to singleton vaginal births from the Niday perinatal database (2004-2006) in Ontario, Canada. Births were divided into income and education groups by quintiles.

Pregnancy outcomes in diabetes subtypes: how do they compare? A province-based study of Ontario, 2005-2006.

Objective: To ascertain differences in pregnancy outcomes between women with diabetes subtypes (type 1 [DM1], type 2 [DM2], women with gestational [GDM])] and non-diabetic women within a large Canadian population.

Methods: We performed a retrospective multi-cohort analysis of all obstetrical deliveries that occurred in the province of Ontario between April 1, 2005, and March 31, 2006. Data were extracted from the Ontario Niday Perinatal Database.

Utilization of health care services of pregnant women complicated by preeclampsia in Ontario.

Objective: To assess the utilization of health care services by pregnant women affected by preeclampsia (PE).

Design: Population-based study.

Setting: Perinatal partnership hospitals in Ontario.

In vitro fertilization is associated with an increased risk for preeclampsia.

Objective: To assess the association of intrauterine insemination, in vitro fertilization (IVF) and ovulation induction with the risk of preeclampsia.

Methods: We conducted a population based retrospective cohort study of pregnancies conceived by assisted reproductive technology (1357 exposure subjects, 5190 controls) based on 2005 Niday Perinatal Database for Ontario, Canada. All pregnancies conceived by assisted reproductive technology were identified as exposure group.

Risk of birth defects increased in pregnancies conceived by assisted human reproduction.

Objective: To assess the risk of birth defects in infants born after assisted human reproduction (AHR).

Design: Retrospective cohort study.

Setting: Niday Perinatal Database for the province of Ontario, 82 sites, both primary and tertiary centers.