Jewish cultural and religious factors and uptake of population-based BRCA testing across denominations: a cohort study

Pilot study of a decision aid on BRCA1/2 genetic testing among Orthodox Jewish women

INTRODUCTION

Orthodox Jewish women face unique social, cultural, and religious factors that may influence uptake of BRCA1/2 genetic testing. We examined the impact of a web-based decision aid (DA) on BRCA1/2 genetic testing intention/completion among Orthodox Jewish women. We conducted a single-arm pilot study among 50 Orthodox Jewish women who were given access to a web-based DA entitled RealRisks and administered serial surveys at baseline and 1 and 6 months after exposure to the DA. Descriptive statistics were conducted for baseline characteristics and study measures. Comparisons were made to assess changes in study measures over time. Fifty Orthodox Jewish women enrolled in the study with a mean age of 43.9 years (standard deviation [SD] 14.6), 70% Modern Orthodox, 2% with personal history of breast cancer, and 68% and 16% with a family history of breast or ovarian cancer, respectively. At baseline, 27 (54%) participants intended to complete genetic testing. Forty-three participants (86%) completed RealRisks and the 1-month survey and 38 (76%) completed the 6-month survey. There was a significant improvement in BRCA1/2 genetic testing knowledge and decrease in decisional conflict after exposure to the DA. At 1 month, only 20 (46.5%) completed or intended to complete genetic testing (p = 0.473 compared to baseline). While the DA improved genetic testing knowledge and reduced decisional conflict, genetic testing intention/completion did not increase over time. Future interventions should directly address barriers to BRCA1/2 genetic testing uptake and include input from leaders in the Orthodox Jewish community.

CLINICALTRIALS

GOV ID

NCT03624088 (8/7/18).

BRCA awareness and testing experience in the UK Jewish population: a qualitative study

BACKGROUND

1 in 40 UK Jewish individuals carry a pathogenic variant in BRCA1/BRCA2. Traditional testing criteria miss half of carriers, and so population genetic testing is being piloted for Jewish people in England. There has been no qualitative research into the factors influencing BRCA awareness and testing experience in this group. This study aimed to explore these and inform improvements for the implementation of population genetic testing.

METHODS

Qualitative study of UK Jewish adults who have undergone BRCA testing. We conducted one-to-one semistructured interviews via telephone or video call using a predefined topic guide, until sufficient information power was reached. Interviews were audio-recorded, transcribed verbatim and interpreted using applied thematic analysis.

RESULTS

32 individuals were interviewed (28 carriers, 4 non-carriers). We interpreted five themes intersecting across six time points of the testing pathway: (1) individual differences regarding personal/family history of cancer, demographics and personal attitudes/approach; (2) healthcare professionals' support; (3) pathway access and integration; (4) nature of family/partner relationships; and (5) Jewish community factors. Testing was largely triggered by connecting information to a personal/family history of cancer. No participants reported decision regret, although there was huge variation in satisfaction. Suggestions were given around increasing UK Jewish community awareness, making information and support services personally relevant and proactive case management of carriers.

CONCLUSIONS

There is a need to improve UK Jewish community BRCA awareness and to highlight personal relevance of testing for individuals without a personal/family history of cancer. Traditional testing criteria caused multiple issues regarding test access and experience. Carriers want information and support services tailored to their individual circumstances.

From the patient to the population: Use of genomics for population screening

Genomic medicine is expanding from a focus on diagnosis at the patient level to prevention at the population level given the ongoing under-ascertainment of high-risk and actionable genetic conditions using current strategies, particularly hereditary breast and ovarian cancer (HBOC), Lynch Syndrome (LS) and familial hypercholesterolemia (FH). The availability of large-scale next-generation sequencing strategies and preventive options for these conditions makes it increasingly feasible to screen pre-symptomatic individuals through public health-based approaches, rather than restricting testing to high-risk groups. This raises anew, and with urgency, questions about the limits of screening as well as the moral authority and capacity to screen for genetic conditions at a population level. We aimed to answer some of these critical questions by using the WHO Wilson and Jungner criteria to guide a synthesis of current evidence on population genomic screening for HBOC, LS, and FH.