Clara Calvert

ORCID: 0000-0003-3272-1040
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Global Maternal and Child Health
  • COVID-19 Impact on Reproduction
  • Maternal and fetal healthcare
  • Maternal and Perinatal Health Interventions
  • HIV/AIDS Research and Interventions
  • Adolescent Sexual and Reproductive Health
  • Pregnancy and preeclampsia studies
  • Reproductive Health and Contraception
  • Breastfeeding Practices and Influences
  • HIV, Drug Use, Sexual Risk
  • Child Nutrition and Water Access
  • HIV/AIDS Impact and Responses
  • Maternal Mental Health During Pregnancy and Postpartum
  • Sex work and related issues
  • Reproductive System and Pregnancy
  • Neonatal Respiratory Health Research
  • COVID-19 epidemiological studies
  • Pregnancy and Medication Impact
  • COVID-19 and healthcare impacts
  • Child Nutrition and Feeding Issues
  • Data-Driven Disease Surveillance
  • Migration, Health and Trauma
  • Vaccine Coverage and Hesitancy
  • Birth, Development, and Health
  • Infant Development and Preterm Care

London School of Hygiene & Tropical Medicine
2016-2025

University of Edinburgh
2021-2025

Public Health Scotland
2024-2025

University of London
2012-2024

Centre for Global Health Research
2022-2023

Royal Air Force College Cranwell
2020

Creative Commons
2013

Ulster Hospital
2004

Abstract Population-level data on COVID-19 vaccine uptake in pregnancy and SARS-CoV-2 infection outcomes are lacking. We describe pregnant women Scotland, using whole-population from a national, prospective cohort. Between the start of program 8 December 2020 31 October 2021, 25,917 vaccinations were given to 18,457 women. Vaccine coverage was substantially lower than general female population 18−44 years; 32.3% giving birth 2021 had two doses compared 77.4% all The extended perinatal...

10.1038/s41591-021-01666-2 article EN cc-by Nature Medicine 2022-01-13
Clara Calvert Meredith Brockway Helga Zoëga Jessica E. Miller Jasper V. Been and 95 more A. Kofi Amegah Amy Racine-Poon Solmaz Eradat Oskoui Ishaya I. Abok Nima Aghaeepour Christie Akwaowo Belal Alshaikh Adejumoke Idowu Ayede Fabiana Bacchini Behzad Barekatain Rodrigo Barnes Karolina Bebak Anick Bérard Zulfiqar A Bhutta Jeffrey R. Brook Lenroy Bryan Kim N. Cajachagua‐Torres Marsha Campbell‐Yeo Dinh‐Toi Chu Kristin L. Connor Luc Cornette Sandra Cortés Mandy Daly Christian Debauche Iyabode Olabisi Florence Dedeke Kristjana Einarsdóttir Hilde Engjom Guadalupe Estrada‐Gutiérrez Ilaria Fantasia Nicole Fiorentino Meredith Franklin Abigail Fraser Onesmus Gachuno Linda A. Gallo Mika Gissler Siri E. Håberg Abbas Habibelahi Jonas Häggström Lauren Hookham Lisa Hui Luis Huicho Karen J. Hunter Sayeeda Huq Ashish KC Seilesh Kadambari Roya Kelishadi Narjes Khalili Joanna Kippen Kirsty Le Doaré Javier Llorca Laura A. Magee Maria C. Magnus Kenneth K. C. Man Patrick Mburugu Rishi P. Mediratta Andrew D. Morris Nazeem Muhajarine Rachel Mulholland Livia Nagy Bonnard Victoria Nakibuuka Natasha Nassar Sylvester Dodzi Nyadanu Laura Oakley Adesina Oladokun Oladapo Olayemi Olanike Abosede Olutekunbi Rosena O. Oluwafemi Taofik Oluwaseun Ogunkunle Chris Orton Anne K. Örtqvist Joseph Ouma Oyejoke Oyapero Kirsten R. Palmer Lars Henning Pedersen Gavin Pereira Isabel Pereyra Roy K. Philip Dominik Pruski Marcin Przybylski Hugo G. Quezada‐Pinedo Annette K. Regan Natasha Rhoda Tonia Rihs Taylor Riley Thiago Augusto Hernandes Rocha Daniel L. Rolnik Christoph Saner Francisco J. Schneuer Vivienne Souter Olof Stephansson Shengzhi Sun Emma Swift Miklós Szabó Marleen Temmerman Lloyd Tooke

Abstract Preterm birth (PTB) is the leading cause of infant mortality worldwide. Changes in PTB rates, ranging from −90% to +30%, were reported many countries following early COVID-19 pandemic response measures (‘lockdowns’). It unclear whether this variation reflects real differences lockdown impacts, or perhaps stillbirth rates and/or study designs. Here we present interrupted time series and meta-analyses using harmonized data 52 million births 26 countries, 18 which had representative...

10.1038/s41562-023-01522-y article EN cc-by Nature Human Behaviour 2023-02-27

<h3>Introduction:</h3> Electronic decision-support systems (EDSSs) aim to improve the quality of antenatal care (ANC) through adherence evidence-based guidelines. We assessed potential mHealth integrated model hypertension, diabetes, and ANC EDSS World Health Organization in primary-level health facilities Nepal. <h3>Methods:</h3> From December 2021 January 2023, we conducted a mixed-methods evaluation 19 Bagmati Province, Implementation was from March 2022 August 2022. facility survey,...

10.9745/ghsp-d-23-00370 article EN cc-by Global Health Science and Practice 2025-01-09

In regions without complete-coverage civil registration and vital statistics systems there is uncertainty about even the most basic demographic indicators. such regions, majority of deaths occur outside hospitals are not recorded. Worldwide, fewer than one-third assigned a cause, with least information available from impoverished nations. populations like this, verbal autopsy (VA) commonly used tool to assess cause death estimate cause-specific mortality rates distribution by cause. VA uses...

10.1080/01621459.2016.1152191 article EN Journal of the American Statistical Association 2016-04-11

BackgroundAs the HIV epidemic in sub-Saharan Africa matures, evidence about age distribution of new infections and how this has changed over is needed to guide prevention. We aimed assess trends age-specific incidence six population-based cohort studies eastern southern Africa, reporting changes mean at infection, infections, birth cumulative incidence.MethodsWe used a Bayesian model reconstruct from repeated observations individuals' serostatus survival collected among population cohorts...

10.1016/s2352-3018(21)00069-2 article EN cc-by The Lancet HIV 2021-06-28

Abstract Evidence on associations between COVID-19 vaccination or SARS-CoV-2 infection and the risk of congenital anomalies is limited. Here we report a national, population-based, matched cohort study using linked electronic health records from Scotland (May 2020-April 2022) to estimate association and, separately, six weeks pre-conception 19 days gestation [1] any major anomaly [2] non-genetic anomaly. Mothers vaccinated in this pregnancy exposure period mostly received an mRNA vaccine...

10.1038/s41467-022-35771-8 article EN cc-by Nature Communications 2023-01-06

Objective To assess the impact of introducing electronic decision support systems (EDSS)—electronic data entry implemented alongside existing paper-based antenatal care (ANC) records—on completeness and agreement ANC records. Design Two-phase cross-sectional (before after) substudy mobile health integrated model hypertension, diabetes (mIRA project) process evaluation. Setting Four rural districts in Bagmati Province, Nepal, 19 primary healthcare facilities. Participants records from...

10.1136/bmjopen-2024-086255 article EN cc-by-nc-nd BMJ Open 2025-03-01

To investigate mortality in women Burkina Faso the 4 years following a life-threatening near-miss obstetric complication and to identify medical, social health-care-related causes of death.In total, 1014 were recruited after hospital discharge followed for up years: 337 had complications 677 uncomplicated pregnancies. Significant differences between groups assessed using Fisher's exact test. The medical death identified from records verbal autopsy data; factors associated with interviews...

10.2471/blt.11.094011 article EN cc-by Bulletin of the World Health Organization 2012-03-13

Abstract Data on the safety of COVID-19 vaccines in early pregnancy are limited. We conducted a national, population-based, matched cohort study assessing associations between vaccination and miscarriage prior to 20 weeks gestation and, separately, ectopic pregnancy. identified women Scotland vaccinated 6 preconception 19 days (for miscarriage; n = 18,780) or 2 ectopic; 10,570). Matched, unvaccinated from pre-pandemic pandemic periods were used as controls. Here we show no association...

10.1038/s41467-022-33937-y article EN cc-by Nature Communications 2022-10-17

Abstract Understanding the impact of SARS-CoV-2 infection and COVID-19 vaccination in pregnancy on neonatal maternal outcomes informs clinical decision-making. Here we report a national, population-based, matched cohort study to investigate associations between and, separately, just before or during risk adverse among women Scotland with singleton ending at ≥20 weeks gestation. Neonatal are stillbirth, death, extended perinatal mortality, preterm birth (overall, spontaneous,...

10.1038/s41467-023-40965-9 article EN cc-by Nature Communications 2023-08-29
Coming Soon ...