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Featured researches published by Samara Perez.


Health Psychology | 2012

Human Papillomavirus Vaccination Intentions and Uptake in College Women

Andrea Krawczyk; Samara Perez; Elsa Lau; Christina Holcroft; Rhonda Amsel; Bärbel Knäuper; Zeev Rosberger

OBJECTIVE Using the health belief model (HBM) and theory of planned behavior (TPB) as theoretical frameworks, the objectives of this study were: (a) to identify correlates of human papillomavirus (HPV) vaccination intentions and (b) to explore differences between correlates of HPV vaccination intentions and uptake. METHODS Undergraduate women (N = 447) who did not intend to receive (n = 223), intended to receive (n = 102), or had received (n = 122) the HPV vaccine were surveyed. Logistic regressions were conducted to examine the correlates of vaccination intentions and uptake. RESULTS Negative health consequences of the vaccine, physicians recommendation, positive attitudes toward the vaccine, and subjective norms were significant correlates of vaccination intentions. When comparing correlates of vaccination intentions to correlates of vaccination uptake, physicians recommendation, subjective norms, and perceived susceptibility to HPV were unique correlates of uptake. CONCLUSION Differences between correlates of vaccination intentions and uptake suggest that social influences of liked and trusted individuals may make an important and unique contribution in motivating young women to receive the HPV vaccine beyond other variables from the HBM and TPB. Future utilization of longitudinal designs is needed to understand which factors may cause individuals to decide to receive the HPV vaccine.


Human Vaccines & Immunotherapeutics | 2015

Parents’ decision-making about the human papillomavirus vaccine for their daughters: II. Qualitative results

Andrea Krawczyk; Samara Perez; Leonora King; Maryline Vivion; Eve Dubé; Zeev Rosberger

The goal of the study was to examine the reasons given by parents who accepted or refused the HPV vaccine for their daughters in the context of a free provincial school-based vaccination program. A random sample of parents of 9–10 y old girls completed a mail-in questionnaire. Parents’ responses to 2 open-ended questions were assessed using content analysis. Coding themes were derived from the Health Belief Model. 806 parents returned and answered the relevant items. 88% of these parents decided to vaccinate their daughter. The primary reasons for parents’ acceptance was the perceived benefits (e.g., health protection, cancer/HPV prevention) and cues to action (e.g., physician recommendation, trusting the school vaccine program). Reasons for parental refusal included barriers (e.g., fear of side effects) and low susceptibility (e.g., their daughter is not at risk). Both groups of parents had unanswered questions, doubts and often inaccurate information. This study provides unique insight into parents’ perspectives concerning the decision making process for their daughter. There appears to be a need for accurate and complete information to assure informed HPV vaccine decision-making by parents and to increase HPV vaccine uptake.


Canadian Medical Association Journal | 2016

Including males in Canadian human papillomavirus vaccination programs: a policy analysis

Gilla K. Shapiro; Samara Perez; Zeev Rosberger

The Canadian National Advisory Committee on Immunization (NACI) recommends human papillomavirus (HPV) vaccination for females aged 9–26 years (bivalent or quadrivalent vaccine) and males aged 9–26 years (quadrivalent vaccine) ([Figure 1][1]).[1][2] All Canadian provinces and territories


Preventive Medicine | 2017

A multiple streams analysis of the decisions to fund gender-neutral HPV vaccination in Canada

Gilla K. Shapiro; Juliet Guichon; Gillian Prue; Samara Perez; Zeev Rosberger

In Canada, the human papillomavirus (HPV) vaccine is licensed and recommended for females and males. Although all Canadian jurisdictions fund school-based HPV vaccine programs for girls, only six jurisdictions fund school-based HPV vaccination for boys. The research aimed to analyze the factors that underpin government decisions to fund HPV vaccine for boys using a theoretical policy model, Kingdons Multiple Streams framework. This approach assesses policy development by examining three concurrent, but independent, streams that guide analysis: Problem Stream, Policy Stream, and Politics Stream. Analysis from the Problem Stream highlights that males are affected by HPV-related diseases and are involved in transmitting HPV infection to their sexual partners. Policy Stream analysis makes clear that while the inclusion of males in HPV vaccine programs is suitable, equitable, and acceptable; there is debate regarding cost-effectiveness. Politics Stream analysis identifies the perspectives of six different stakeholder groups and highlights the contribution of government officials at the provincial and territorial level. Kingdons Multiple Streams framework helps clarify the opportunities and barriers for HPV vaccine policy change. This analysis identified that the interpretation of cost-effectiveness models and advocacy of stakeholders such as citizen-advocates and HPV-affected politicians have been particularly important in galvanizing policy change.


Papillomavirus Research | 2016

Validation of the vaccine conspiracy beliefs scale

Gilla K. Shapiro; Anne C. Holding; Samara Perez; Rhonda Amsel; Zeev Rosberger

Background Parents’ vaccine attitudes influence their decision regarding child vaccination. To date, no study has evaluated the impact of vaccine conspiracy beliefs on human papillomavirus vaccine acceptance. The authors assessed the validity of a Vaccine Conspiracy Beliefs Scale (VCBS) and determined whether this scale was associated with parents’ willingness to vaccinate their son with the HPV vaccine. Methods Canadian parents completed a 24-min online survey in 2014. Measures included socio-demographic variables, HPV knowledge, health care provider recommendation, Conspiracy Mentality Questionnaire (CMQ), the seven-item VCBS, and parents’ willingness to vaccinate their son at two price points. Results A total of 1427 Canadian parents completed the survey in English (61.2%) or French (38.8%). A Factor Analysis revealed the VCBS is one-dimensional and has high internal consistency (α=0.937). The construct validity of the VCBS was supported by a moderate relationship with the CMQ (r=0.44, p<0.001). Hierarchical regression analyses found the VCBS is negatively related to parents’ willingness to vaccinate their son with the HPV vaccine at both price points (‘free’ or ‘


Current Oncology | 2013

The experience of pain and anxiety in rectal cancer patients during high-dose-rate brachytherapy

S. Néron; Samara Perez; R. Benc; A. Bellman; Zeev Rosberger; T. Vuong

300′) after controlling for gender, age, household income, education level, HPV knowledge, and health care provider recommendation. Conclusions The VCBS is a brief, valid scale that will be useful in further elucidating the correlates of vaccine hesitancy. Future research could use the VCBS to evaluate the impact of vaccine conspiracies beliefs on vaccine uptake and how concerns about vaccination may be challenged and reversed.


Journal of American College Health | 2016

The role of human papillomavirus (HPV)-related stigma on HPV vaccine decision-making among college males

Georden Jones; Samara Perez; Veronika Huta; Zeev Rosberger; Sophie Lebel

BACKGROUND Pain and anxiety have been reported as primary concerns for patients with head-and-neck, gynecologic, and prostate cancers undergoing high dose rate (hdr) brachytherapy. However, almost no research has been published on the degree to which these symptoms are experienced by rectal cancer patients undergoing hdr brachytherapy. We conducted a pilot study examining the experiences of rectal cancer patients during hdr brachytherapy, specifically the intensity and trajectory of their anxiety and pain. METHODS Rectal cancer patients (n = 25) who received hdr brachytherapy treatment at a hospital in Montreal, Quebec, completed verbal analog scales for pain and anxiety at 4 time points over 4 treatment days. RESULTS On all 4 days, a subset of patients reported moderate-to-severe anxiety before applicator insertion. Pain increased significantly from the time patients were lying on the table to immediately after insertion of the applicator (p < 0.001). Insertion of the applicator appears to be the most painful part of the procedure, and although anxiety declined to below baseline after applicator removal, pain remained somewhat elevated. Some patients required conscious sedation; however, reports of moderate-to-severe pain were more frequent from patients who received pain medications than from patients who did not receive such medication (p < 0.05). CONCLUSIONS Most patients with rectal cancer tolerated hdr rectal brachytherapy well, although the procedure is stressful and painful for some. Insertion of the applicator was found to be the point of maximal pain, and medication was not always completely successful at alleviating the pain, suggesting that additional psychosocial interventions might be needed, with particular emphasis on the time of applicator insertion.


BMJ Open | 2017

Investigating Canadian parents' HPV vaccine knowledge, attitudes and behaviour: A study protocol for a longitudinal national online survey

Gilla K. Shapiro; Samara Perez; Anila Naz; Ovidiu Tatar; Juliet Guichon; Rhonda Amsel; Gregory D. Zimet; Zeev Rosberger

ABSTRACT Objective: The goals of the present study are (1) to identify sociodemographic and psychosocial predictors of human papillomavirus (HPV)-related stigma and (2) to examine the relationship between HPV-related stigma in predicting HPV vaccine decision-making among college males. Participants: Six hundred and eighty college males aged 18–26 from 3 Canadian universities were recruited from September 2013 to April 2014. Methods: Participants completed a self-report survey assessing HPV-related stigma, psychosocial predictors of HPV-related stigma, and HPV vaccine decision-making. The results were analyzed using variance analyses and linear regressions. Results: Ethnicity, province of residence, and perceived severity of HPV were found to significantly influence HPV-related stigma. In addition, HPV-related stigma was higher in those unaware of the availability of the HPV vaccine for males. Conclusions: Promotion efforts should concentrate on Asian minorities and should avoid HPV severity messaging, as these may lead to higher HPV-related stigma, which in turn may act as a barrier to vaccination.


Cancer Nursing | 2015

The Meaning and Experience of Patients Undergoing Rectal High-Dose-Rate Brachytherapy.

Samara Perez; Sylvain Néron; Renata Benc; Zeev Rosberger; Té Vuong

Introduction Human papillomavirus (HPV), a sexually transmitted infection, can cause anogenital warts and a number of cancers. To prevent morbidity and mortality, three vaccines have been licensed and are recommended by Canada’s National Advisory Committee on Immunisation (for girls since 2007 and boys since 2012). Nevertheless, HPV vaccine coverage in Canada remains suboptimal in many regions. This study will be the first to concurrently examine the correlates of HPV vaccine decision-making in parents of school-aged girls and boys and evaluate changes in parental knowledge, attitudes and behaviours over time. Methods and analysis Using a national, online survey utilising theoretically driven constructs and validated measures, this study will identify HPV vaccine coverage rates and correlates of vaccine decision-making in Canada at two time points (August–September 2016 and June–July 2017). 4606 participants will be recruited to participate in an online survey through a market research and polling firm using email invitations. Data cleaning methods will identify inattentive or unmotivated participants. Ethics and dissemination The study received research ethics board approval from the Research Review Office, Integrated Health and Social Services University Network for West-Central Montreal (CODIM-FLP-16–219). The study will adopt a multimodal approach to disseminate the study’s findings to researchers, clinicians, cancer and immunisation organisations and the public in Canada and internationally.


Psycho-oncology | 2018

A fertility needs assessment survey of male cancer patients

Samara Perez; Sylvie Lambert; Virginia Lee; Carmen G. Loiselle; Peter Chan; Abha A. Gupta; Kirk C. Lo; Zeev Rosberger; Phyllis Zelkowitz

Background: High-dose-rate (HDR) brachytherapy is a precise form of radiation therapy that targets cancerous tumors by directly applying the radiation source at the site or directly next to the tumor. Patients often experience but underreport pain and anxiety related to cancer treatments. At present, there is no research available concerning the pervasiveness and intensity of patients’ pain and anxiety during rectal brachytherapy. Objective: The aim of this study was to examine patients’ thoughts, emotions, coping strategies, physical sensations, and needs during rectal HDR brachytherapy treatment. Methods: Twenty-five patients with rectal cancer were interviewed using a semi-structured qualitative interview following the completion of their brachytherapy treatment delivered at a Montreal-based hospital in Quebec, Canada. Results: The experiences of pain and discomfort varied greatly between patients and were linked to the meaning patients attributed to the treatment itself, sense of time, the body’s lithotomic position, insertion of the treatment applicator, and the patients’ sense of agency and empowerment during the procedure. Patients drew upon a variety of internal and external resources to help them cope with discomfort. Conclusion: Staff need to know about the variation in the physical and emotional experiences of patients undergoing this treatment. Implications for Practice: Clinical teams can tailor their procedural behavior (eg, using certain language, psychosocial interventions) according to patients’ needs to increase patients’ comfort and ultimately improve their experience of HDR rectal brachytherapy.

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Ovidiu Tatar

Jewish General Hospital

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Anila Naz

Jewish General Hospital

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Gina Ogilvie

University of British Columbia

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