Alexandra Cernat

Dr. Alexandra Cernat

McMaster University
orcid

Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

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

Representative Publications

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14 January 2019 in BMC Pregnancy and Childbirth
Verified
Journal Article
Open access
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ACAlexandra Cernat
Alexandra Cernat
CFChante De Freitas
Chante De Freitas
UMUmair Majid
Umair Majid
FTForum Trivedi
Forum Trivedi
CHCaroline Higgins
Caroline Higgins
MVMeredith Vanstone
Meredith Vanstone
Non-invasive prenatal testing (NIPT) can be used to accurately detect fetal chromosomal anomalies early in pregnancy by assessing cell-free fetal DNA present in maternal blood. The rapid diffusion of NIPT, as well as the ease and simplicity of the test raises concerns around informed decision-making and the potential for routinization. Introducing NIPT in a way that facilitates informed and autonomous decisions is imperative to the ethical application of this technology. We approach this imperative by systematically reviewing and synthesizing primary qualitative research on women’s experiences with and preferences for informed decision-making around NIPT. We searched multiple bibliographic databases including Ovid MEDLINE, EBSCO Cumulative Index to Nursing & Allied Health Literature (CINAHL), and ISI Web of Science Social Sciences Citation Index (SSCI). Our review was guided by integrative qualitative meta-synthesis, and we used a staged coding process similar to that of grounded theory to conduct our analysis. Thirty empirical primary qualitative research studies were eligible for inclusion. Women preferred to learn about NIPT from their clinicians, but they expressed dissatisfaction with the quality and quantity of information provided during counselling and often sought information from a variety of other sources. Women generally had a good understanding of test characteristics, and the factors of accuracy, physical risk, and test timing were the critical information elements that they used to make informed decisions around NIPT. Women often described NIPT as easy or just another blood test, highlighting threats to informed decision-making such as routinization or a pressure to test. Women’s unique circumstances modulate the information that they value and require most in the context of making an informed decision. Widened availability of trustworthy information about NIPT as well as careful attention to the facilitation of counselling may help facilitate informed decision-making. PROSPERO 2018 CRD42018086261 .

16 April 2018 in BMC Medical Ethics
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Journal Article
Open access
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MVMeredith Vanstone
Meredith Vanstone
ACAlexandra Cernat
Alexandra Cernat
JNJeff Nisker
Jeff Nisker
LSLisa Schwartz
Lisa Schwartz
Non-Invasive Prenatal Testing (NIPT) is a technology which provides information about fetal genetic characteristics (including sex) very early in pregnancy by examining fetal DNA obtained from a sample of maternal blood. NIPT is a morally complex technology that has advanced quickly to market with a strong push from industry developers, leaving many areas of uncertainty still to be resolved, and creating a strong need for health policy that reflects women’s social and ethical values. We approach the need for ethical policy-making by studying the use of NIPT and emerging policy in the province of Ontario, Canada. Using an adapted version of constructivist grounded theory, we conducted interviews with 38 women who have had personal experiences with NIPT. We used an iterative process of data collection and analysis and a staged coding strategy to conduct a descriptive analysis of ethics issues identified implicitly and explicitly by women who have been affected by this technology. The findings of this paper focus on current ethical issues for women seeking NIPT, including place in the prenatal pathway, health care provider counselling about the test, industry influence on the diffusion of NIPT, consequences of availability of test results. Other issues gain relevance in the context of future policy decisions regarding NIPT, including funding of NIPT and principles that may govern the expansion of the scope of NIPT. These findings are not an exhaustive list of all the potential ethical issues related to NIPT, but rather a representation of the issues which concern women who have personal experience with this test. Women who have had personal experience with NIPT have concerns and priorities which sometimes contrast dramatically with the theoretical ethics literature. These findings suggest the importance of engaging patients in ethical deliberation about morally complex technologies, and point to the need for more deliberative patient engagement work in this area.

26 August 2021 in European Journal of Human Genetics
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Journal Article
Open access
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ACAlexandra Cernat
Alexandra Cernat
RHRobin Hayeems
Robin Hayeems
WUWendy J. Ungar
Wendy J. Ungar
Cascade genetic testing is the identification of individuals at risk for a hereditary condition by genetic testing in relatives of people known to possess particular genetic variants. Cascade testing has health system implications, however cascade costs and health effects are not considered in health technology assessments (HTAs) that focus on costs and health consequences in individual patients. Cascade health service use must be better understood to be incorporated in HTA of emerging genetic tests for children. The purpose of this review was to characterise published research related to patterns and costs of cascade health service use by relatives of children with any condition diagnosed through genetic testing. To this end, a scoping literature review was conducted. Citation databases were searched for English-language papers reporting uptake, costs, downstream health service use, or cost-effectiveness of cascade investigations of relatives of children who receive a genetic diagnosis. Included publications were critically appraised, and findings were synthesised. Twenty publications were included. Sixteen had a paediatric proband population; four had a combined paediatric and adult proband population. Uptake of cascade testing varied across diseases, from 37% for cystic fibrosis, 39% to 65% for hypertrophic cardiomyopathy, and 90% for rare monogenic conditions. Two studies evaluated costs. It was concluded that cascade testing in the child-to-parent direction has been reported in a variety of diseases, and that understanding the scope of cascade testing will aid in the design and conduct of HTA of emerging genetic technologies to better inform funding and policy decisions.

19 February 2019
Verified
Journal Article
Closed access
MVMeredith Vanstone
Meredith Vanstone
ACAlexandra Cernat
Alexandra Cernat
UMUmair Majid
Umair Majid
FTForum Trivedi
Forum Trivedi
CFChanté De Freitas
Chanté De Freitas

27 April 2021 in Children
Verified
Journal Article
Open access
PDF file
ACAlexandra Cernat
Alexandra Cernat
RHRobin Hayeems
Robin Hayeems
LPLisa A. Prosser
Lisa A. Prosser
WUWendy J. Ungar
Wendy J. Ungar
Cascade genetic testing is indicated for family members of individuals testing positive on a genetic test, and is particularly relevant for child health because of their vulnerability and the long-term health and economic implications. Cascade testing has patient- and health system-level implications; however cascade costs and health effects are not routinely considered in economic evaluation. The methodological challenges associated with incorporating cascade effects in economic evaluation require examination. The purpose of this scoping review was to identify published economic evaluations that considered cascade genetic testing. Citation databases were searched for English-language economic evaluations reporting on cascade genetic testing. Nineteen publications were included. In four, genetic testing was used to identify new index patients—cascade effects were also considered; thirteen assessed cascade genetic testing strategies for the identification of at-risk relatives; and two calculated the costs of cascade genetic testing as a secondary objective. Methodological challenges associated with incorporating cascade effects in economic evaluation are related to study design, costing, measurement and valuation of health outcomes, and modeling. As health economic studies may currently be underestimating both the cost and health benefits attributable to genetic technologies through omission of cascade effects, development of methods to address these difficulties is required.

20 November 2020 in British Journal of Ophthalmology
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Journal Article
Closed access
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ACAlexandra Cernat
Alexandra Cernat
MJMargaret Jamieson
Margaret Jamieson
RKRuthAnne Kavelaars
RuthAnne Kavelaars
SKSina Khalili
Sina Khalili
VBVishaal Bhambhwani
Vishaal Bhambhwani
MMMoretti Myla
Moretti Myla
Background/aims Children with bilateral cataracts may undergo immediate sequential bilateral cataract surgery (ISBCS), which involves surgery on both eyes during the same general anaesthesia, or delayed sequential bilateral cataract surgery (DSBCS), which involves operating on each eye on separate days and requires a second anaesthesia. ISBCS is viewed with caution because of the risk of bilateral endophthalmitis. Proponents of ISBCS emphasise that the incidence of serious complications is low and is outweighed by benefits such as avoidance of multiple anaesthesia, faster visual rehabilitation and potential for decreased costs. However, there is a paucity of literature regarding the cost-effectiveness of ISBCS in children. We conducted a cost-effectiveness analysis to determine whether ISBCS is more cost-effective than DSBCS from the societal and health system perspectives in Ontario, Canada, which has a universal, single-payer system. Methods A retrospective analysis of children who underwent ISBCS or DSBCS at a tertiary referral paediatric hospital was conducted. A decision tree was constructed using TreeAge Pro 2018 software. Clear visual axis was the measure of effectiveness. A time horizon of 8 weeks postoperatively was adopted. Both direct and indirect costs were included. Results Fifty-three children were included, 37 in the ISBCS group and 16 in the DSBCS group. ISBCS and DSBCS were equally effective. ISBCS resulted in cost-savings of $3,776 (95% CI:−$4,641 to $12,578) CAD, per patient, from the societal perspective and $2,200 (95% CI:−$5,615 to $10,373) CAD per patient from the health system perspective. Conclusion ISBCS was less costly than DSBCS from both societal and health system perspectives while being equally effective.