Cardiovascular health after maternal placental syndromes (CHAMPS): population-based retrospective cohort study

JG Ray, MJ Vermeulen, MJ Schull, DA Redelmeier - The Lancet, 2005 - thelancet.com
Background Maternal placental syndromes, including the hypertensive disorders of pregnancy
and abruption or infarction of the placenta, probably originate from diseased placental …

Analysis of observational studies in the presence of treatment selection bias: effects of invasive cardiac management on AMI survival using propensity score and …

…, DE Wennberg, DA Alter, DJ Gottlieb, MJ Vermeulen - Jama, 2007 - jamanetwork.com
ContextComparisons of outcomes between patients treated and untreated in observational
studies may be biased due to differences in patient prognosis between groups, often …

Association between waiting times and short term mortality and hospital admission after departure from emergency department: population based cohort study from …

A Guttmann, MJ Schull, MJ Vermeulen, TA Stukel - Bmj, 2011 - bmj.com
Objective To determine whether patients who are not admitted to hospital after attending an
emergency department during shifts with long waiting times are at risk for adverse events. …

Association between MRI exposure during pregnancy and fetal and childhood outcomes

JG Ray, MJ Vermeulen, A Bharatha, WJ Montanera… - Jama, 2016 - jamanetwork.com
Importance Fetal safety of magnetic resonance imaging (MRI) during the first trimester of
pregnancy or with gadolinium enhancement at any time of pregnancy is unknown. Objective To …

Emergency department crowding and thrombolysis delays in acute myocardial infarction

MJ Schull, M Vermeulen, G Slaughter… - Annals of emergency …, 2004 - Elsevier
STUDY OBJECTIVE: We estimate the effect of emergency department (ED) crowding on
door-to-needle time for patients given intravenous thrombolysis for suspected acute myocardial …

Gender differences in job strain, social support at work, and psychological distress.

M Vermeulen, C Mustard - Journal of occupational health …, 2000 - psycnet.apa.org
Using the demand-control-support model of job strain, the authors examined gender differences
in the relationship between psychosocial work exposures and psychological distress in …

Association of neural tube defects and folic acid food fortification in Canada

JG Ray, C Meier, MJ Vermeulen, S Boss, PR Wyatt… - The Lancet, 2002 - thelancet.com
Many women do not receive folic acid supplements before conception. In response, most of
Canada's cereal grain products were being fortified with folic acid by January, 1998, thereby …

Association between ABO and Rh blood groups and SARS-CoV-2 infection or severe COVID-19 illness: a population-based cohort study

JG Ray, MJ Schull, MJ Vermeulen… - Annals of internal …, 2021 - acpjournals.org
Background: The ABO and rhesus (Rh) blood groups may influence risk for severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Objective: To determine whether …

[HTML][HTML] Validation of a rule for termination of resuscitation in out-of-hospital cardiac arrest

…, A Kiss, R Theriault, D Eby, M Vermeulen… - … England Journal of …, 2006 - Mass Medical Soc
Background We prospectively evaluated a clinical prediction rule to be used by emergency
medical technicians (EMTs) trained in the use of an automated external defibrillator for the …

Vitamin B12 and the risk of neural tube defects in a folic-acid-fortified population

JG Ray, PR Wyatt, MD Thompson, MJ Vermeulen… - …, 2007 - journals.lww.com
Background: Low maternal vitamin B 12 status may be a risk factor for neural tube defects (NTDs).
Prior studies used relatively insensitive measures of B 12, did not adjust for folate …