Elena Parvez

Elena Parvez


Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 May 2022 in The Lancet Global Health
Verified
Journal Article
Open access
CSCatherine A Shaw
Catherine A Shaw
RPRiinu Pius
Riinu Pius
TDThomas M Drake
Thomas M Drake
LNLisa Norman
Lisa Norman
AAAdesoji O Ademuyiwa
Adesoji O Ademuyiwa
JLJean Wilguens Lartigue
Jean Wilguens Lartigue
Early death after cancer surgery is higher in low-income and middle-income countries (LMICs) compared with in high-income countries, yet the impact of facility characteristics on early postoperative outcomes is unknown. The aim of this study was to examine the association between hospital infrastructure, resource availability, and processes on early outcomes after cancer surgery worldwide. A multimethods analysis was performed as part of the GlobalSurg 3 study—a multicentre, international, prospective cohort study of patients who had surgery for breast, colorectal, or gastric cancer. The primary outcomes were 30-day mortality and 30-day major complication rates. Potentially beneficial hospital facilities were identified by variable selection to select those associated with 30-day mortality. Adjusted outcomes were determined using generalised estimating equations to account for patient characteristics and country-income group, with population stratification by hospital. Between April 1, 2018, and April 23, 2019, facility-level data were collected for 9685 patients across 238 hospitals in 66 countries (91 hospitals in 20 high-income countries; 57 hospitals in 19 upper-middle-income countries; and 90 hospitals in 27 low-income to lower-middle-income countries). The availability of five hospital facilities was inversely associated with mortality: ultrasound, CT scanner, critical care unit, opioid analgesia, and oncologist. After adjustment for case-mix and country income group, hospitals with three or fewer of these facilities (62 hospitals, 1294 patients) had higher mortality compared with those with four or five (adjusted odds ratio [OR] 3·85 [95% CI 2·58–5·75]; p<0·0001), with excess mortality predominantly explained by a limited capacity to rescue following the development of major complications (63·0% vs 82·7%; OR 0·35 [0·23–0·53]; p<0·0001). Across LMICs, improvements in hospital facilities would prevent one to three deaths for every 100 patients undergoing surgery for cancer. Hospitals with higher levels of infrastructure and resources have better outcomes after cancer surgery, independent of country income. Without urgent strengthening of hospital infrastructure and resources, the reductions in cancer-associated mortality associated with improved access will not be realised. National Institute for Health and Care Research.

26 June 2014 in The Breast Journal
Verified
Journal Article
Open access
PDF file
EPElena Parvez
Elena Parvez
NHNicole Hodgson
Nicole Hodgson
SCSylvie D. Cornacchi
Sylvie D. Cornacchi
ARAmanda Ramsaroop
Amanda Ramsaroop
MGMaggie Gordon
Maggie Gordon
PLPeter J. Lovrics
Peter J. Lovrics
Although breast conservation surgery (BCS) is commonly performed, several aspects of the procedure remain controversial. We undertook a cross-sectional survey to compare Canadian (CDN) and American (AM) general surgeons' reported BCS practice patterns to better understand the cross-border differences in early-stage breast cancer surgery care. A modified Dillman Method survey was mailed to 1,447 AM and 1,443 CDN surgeons. Factors evaluated included preoperative assessment, margin definition, surgical techniques, and re-excision practices. The response rate was 26% and 51% for AM and CDN surgeons, respectively. There was variation in use of preoperative core biopsies. American surgeons required wider margins for invasive cancer and ductal carcinoma in situ, and more often recommend re-excision for invasive cancer with 1 and 2 mm margins (p < 0.05). There was also variability in surgical techniques used for intraoperative margin assessment. Wide variation in BCS practice was observed, with some of this variability related to surgeon country.

1 August 2020 in Clinical Breast Cancer
Verified
Journal Article
Closed access
EPElena Parvez
Elena Parvez
KMKaryne Martel
Karyne Martel
DMDominique Morency
Dominique Morency
SDSinziana Dumitra
Sinziana Dumitra
AMAri N. Meguerditchian
Ari N. Meguerditchian
JBJean-François Boileau
Jean-François Boileau

25 October 2022 in Annals of Surgical Oncology
Verified
Journal Article
Closed access
PDF file
EPElena Parvez
Elena Parvez
FKFarzin Khosrow-Khavar
Farzin Khosrow-Khavar
TDTeodora Dumitra
Teodora Dumitra
CNCarolyn Nessim
Carolyn Nessim
ÉBÉricka Bernard-Bédard
Éricka Bernard-Bédard
SDSinziana Dumitra
Sinziana Dumitra

16 December 2023 in Clinical Breast Cancer
Verified
Journal Article
Closed access
TMTyler McKechnie
Tyler McKechnie
ZBZachary Brown
Zachary Brown
OLOlivia Lovrics
Olivia Lovrics
SYShuling Yang
Shuling Yang
TKTania Kazi
Tania Kazi
EPElena Parvez
Elena Parvez

21 April 2023 in Breast Cancer Research and Treatment
Verified
Journal Article
Closed access
PDF file
EPElena Parvez
Elena Parvez
MCMegan Chu
Megan Chu
DKDavid Kirkwood
David Kirkwood
ADAristithes Doumouras
Aristithes Doumouras
MLMark Levine
Mark Levine
JBJessica Bogach
Jessica Bogach