Neoplasms

Digestive System Diseases

All Conditions

Colorectal Neoplasms

Intestinal Neoplasms

Gastrointestinal Neoplasms

Digestive System Neoplasms

Gastrointestinal Diseases

Colonic Diseases

Intestinal Diseases

Rectal Diseases

Participants who have the GG genotype will be assigned to magnesium glycinate.

Participants who have the GG genotype will be assigned to placebo group

Participants who have the GA/AA genotype will be assigned to magnesium glycinate

Participants who have the GA/AA genotype will be assigned to placebo group

Oral administration of magnesium glycinate daily for 12 weeks

Magnesium glycinate

Oral administration of identical-appearing placebo daily for 12 weeks

Placebo

Qi Dai, MD, PhD

Chang Yu, PhD

Martha J Shrubsole, Ph.D.

Colorectal cancer is the fourth most common incident cancer and the second most common cause of cancer death in the United States, with approximately 150,000 new cases and 57,000 deaths per year. High calcium intake and magnesium may protect against colorectal cancer and adenoma, however, results have been inconsistent. We found that genetic makeup, associated with magnesium absorption and re-absorption, significantly interacted with the calcium and magnesium ratio in relation to the both adenomatous and hyperplastic polyps. Participants who carried at least one 1482Ile allele (G-\>A)of TRPM7 and who consumed diets with a high calcium/magnesium ratio were at a higher risk of adenoma and hyperplastic polyps than were participants who did not carry the polymorphism. We hypothesize that the reduction in the dietary Ca/Mg ratio may change the markers directly related to tumorigenesis. The primary aims of this study are to conduct a randomized placebo-controlled intervention trial to test whether reducing the Ca/mg intake ratio through magnesium supplementation has effects on the related biomarkers. We will also examine whether the effect of modulating Ca/Mg intake ratio may be more pronounced among those who carry the 1482Ile allele compared those who don't carry the 1482Ile allele. Results from our study will help to identify people at a high risk of colorectal adenoma and to develop personalized strategies to prevent occurrence of colorectal adenoma, and thus, colorectal cancer through dietary change or nutritional fortification.

Precision-Based Magnesium Trial

Personalized Prevention of Colorectal Cancer Trial (PPCCT)

TRPM7 and MLKL have been detected using immunohistochemical (IHC) techniques.

Ki67:BAX and Ki67:TUNEL have been analyzed using immunohistochemical (IHC) techniques.

Cox2 has been analyzed using immunohistochemical (IHC)

Serum magnesium concentration was determined using 7D70 Magnesium Reagent Kit from Abbot Laboratories (Abbott Park, IL) the assay was conducted at the Vanderbilt Pathology Laboratory Services.

Body magnesium status obtained using magnesium tolerance test (MTT)

Assays of CRP for 180 participants were performed using immuno turbidimetric immunoassay based commercial assay kits (Pointe Scientific, Inc, Canton, MI) at Vanderbilt Lipid Laboratory

Urinary PGE-M level was measured using a liquid chromatography/tandem mass spectrometric method at the Integrated Health Sciences Facility Core of the Vanderbilt Center in Molecular Toxicology.

Vanderbilt University Medical Center

Professor

Skin and Connective Tissue Diseases

Urinary Tract, Sexual Organs, and Pregnancy Conditions

Gland and Hormone Related Diseases

Rare Diseases

Breast Neoplasms

Ovarian Neoplasms

Carcinoma, Ovarian Epithelial

Ovarian Cancer

Ovarian Epithelial Cancer

Women who screen as eligible for BRCA genetic counseling will receive the education and decision support tool, RealRisks, along with standard educational material and a high-risk message. The high-risk status of the women will also be flagged in the online tool used by the hospital to visualize electronic health record data (iNYP).

The enrolled health care providers of these women will be given access to BNAV, which summarizes their enrolled patients' breast cancer risk profiles and provides educational resources on genetic testing and prevention options. Before their clinical encounter with an enrolled patient, these providers will also be sent the personalized breast cancer risk summary that is created by data the patient entered into RealRisks.

Women who screen as eligible for BRCA genetic counseling will receive standard educational material and a high-risk message. The high-risk status of the women will also be flagged in the online tool used by the hospital to visualize electronic health record data (iNYP).

RealRisks is a web-based patient decision aid with modules on risk assessment, family history and breast cancer, genetic testing, and prevention options. Participants enter family history data into RealRisks, and RealRisks calculates 5-year breast cancer risk, lifetime breast cancer risk, and the probability of carrying a BRCA mutation. This information is then interactively presented to the participant. RealRisks facilitates the participant in identifying their intention to undergo BRCA genetic testing and the factors that are important to the participant in making this decision. RealRisks produces a summary of all of this information that the participant can print and take with her to a health care appointment.

RealRisks

BNAV is a web-based decision support tool for healthcare providers with educational modules on genetic testing, chemoprevention, patient-centered care, and screening. BNAV also provides providers with a table outlining their enrolled patients' breast cancer risk, eligibility for genetic testing, and stated preferences.

BNAV

Enrolled patients will have their eligibility for BRCA genetic testing flagged in iNYP, the hospital's portal for visualizing EHR data (standard practice).

iNYP

Enrolled patient participants will be sent standard educational brochures on genes and breast cancer and the CUMC breast cancer prevention clinic

Standard Educational Material

Enrolled patient participants will receive a letter that informs them that they meet eligibility criteria for BRCA genetic testing, outlines prevention options, and recommends discussing genetic counseling referral with their health care provider (standard practice).

High-Risk Message

Rita Kukafka, DrPH, MA

The objective of this study is to expand genetic testing for hereditary breast and ovarian cancer syndrome to a broader population of high-risk women by prompting appropriate referrals from the primary care setting with the use of an electronic health record-embedded breast cancer risk navigation (BNAV) tool. To address patient-related barriers to genetic testing, the investigators developed a web-based decision aid, RealRisks, which is designed to improve genetic testing knowledge, accuracy of breast cancer risk perceptions, and self-efficacy to engage in a collaborative dialogue about genetic testing.

The study design is a randomized controlled trial of patient educational materials and provider electronic health record (EHR) notice alone (control arm) or in combination with RealRisks and BNAV (intervention arm). The investigators hypothesize that combining the patient-centered RealRisks with the provider-centered BNAV will increase appropriate uptake of genetic counseling. The investigators also hypothesize that genetic counseling decisions will be more informed, and result in less decision conflict and improved shared decision making.

Hereditary breast and ovarian cancer syndrome (HBOC) is an inherited condition that is most commonly associated with mutations in the BRCA1 and BRCA2 genes. Mutation carriers have lifetime risks of breast and ovarian cancer of 60-80% and 20-40%, respectively. Risk management options include intensive breast cancer screening, risk-reducing surgeries, and chemoprevention, which have been shown to improve early detection and reduce cancer incidence and mortality. In particular, prophylactic bilateral salpingo-oophorectomy has been associated with a 60-77%reduction in all-cause mortality among BRCA mutation carriers. Based upon U.S. Preventive Services Task Force guidelines, an estimated 5%-10% of women unaffected with breast cancer are eligible for genetic testing for HBOC, but only 14% of those eligible were referred and 4% had BRCA genetic testing. Many women may be unaware of their high-risk status due to our inability to adequately screen them in the primary care setting. Other reasons for low uptake include inadequate time for counseling and insufficient knowledge about risk-reducing strategies. Women from racial/ethnic minorities are less likely to seek genetic testing for HBOC, contributing to poorer clinical outcomes in these populations compared to non-Hispanic whites. Alternatively, decreasing inappropriate genetics referrals is also important for reducing anxiety and allowing genetic services to be used more efficiently. More research is needed to develop optimal strategies for engaging high-risk women in informed decision-making about genetic testing for HBOC.

The objective of this study is to expand genetic testing for hereditary breast and ovarian cancer syndrome to a broader population of high-risk women by prompting appropriate referrals from the primary care setting with the use of an electronic health record-embedded breast cancer risk navigation (BNAV) tool. To address patient-related barriers to genetic testing, the investigators developed a web-based decision aid, RealRisks, which is designed to improve genetic testing knowledge, accuracy of breast cancer risk perceptions, and self-efficacy to engage in a collaborative dialogue about genetic testing.

The study design is a randomized controlled trial of patient educational materials and provider EHR notice alone (control arm) or in combination with RealRisks and BNAV (intervention arm). The investigators hypothesize that combining the patient-centered RealRisks with the provider-centered BNAV will increase appropriate uptake of genetic counseling. The investigators also hypothesize that genetic counseling decisions will be more informed, and result in less decision conflict and improved shared decision making.

A cluster randomization in which both a provider and his/her enrolled patients will be enrolled in either the intervention or control arm.

Decision Support for BRCA Testing in Ethnically Diverse Women

Change in the accuracy of risk perception among patient participants. Perception will be assessed by comparing a patients perceived risk with their actual risk, and to compare between intervention and control group will be assessed at baseline, after receiving intervention or control materials, after the clinic encounter, and at 6 months. Perceived risk will be measured by Likert and numerical scales and actual risk will be determined by a model.

Likert Scale: Eight 6-point items measuring perceived ability to perform mathematical tasks and preferences for receiving word-based or number-based information.

Analysis: Question 7 reverse coded, then find mean of all 8 item scores. Score 1 = least accurate risk perception, Score 6= most accurate risk perception. A higher score indicates a better outcome.

Likert Scale measuring breast cancer worry among patient participants. To compare between intervention and control group at baseline, after receiving intervention or control materials, after the clinic encounter, and at 6 months Two 7-point items measuring how often patient worries about developing cancer and how much this worry interferes with everyday life. 1="none of the time"; 4="Some of the time"; 7="All of the time". Scores summed.Higher score indicates more worry and more interference with everyday life. Lower score indicates a better outcome.

True false scale measuring knowledge of breast cancer and HBOC among patient participants. To compare between intervention and control group at baseline, after receiving intervention or control materials, after the clinic encounter, and at 6 months 11 true/false items Analysis: Sum # correct; 50%-100% correct is considered good knowledge and indicates better outcome, 0-49% correct is considered poor knowledge.

Likert scale measuring patient attitudes towards BRCA genetic testing. To compare between intervention and control group at baseline, after receiving intervention or control materials, after the clinic encounter, and at 6 months Four 7-point Likert scale items, which are summed; 22 as cut-point for positive/negative items. 22 and above considered positive attitudes. A positive attitude is indicative of a better outcome. 21 and below considered negative attitudes. Up to one missing item will be imputed using the average of the remaining three item scores.

Likert scale measuring degree of self efficacy in making a genetic testing decision among patient participants. To compare between intervention and control group at baseline, after receiving intervention or control materials, after the clinic encounter, and at 6 months 11 5-point Likert scale items (0=not at all confident - 4=very confident) Analysis: items are summed, divided by 11, and multiplied by 25. Scores range from 0 (extremely low efficacy) to 100 (extremely high efficacy). A higher score indicates a better outcome.

Likert scale measuring measuring the extent to which a patient regrets the decision to undergo or not undergo genetic counseling. To compare between intervention and control groups after the clinic encounter and at 6 months Low-literacy option: five 5-point Likert scale items (1=Strongly Agree - 5=Strongly Disagree) measuring whether regret was felt to be present, whether the decision was the right one, whether the patient would make the same decision again, whether the decision was a wise one, and whether the decision had resulted in harm.

Analysis: Reverse code Regret_2 and Regret_4. Subtract 1 from each item score and multiply by 25. Mean scores of items Regret_1-Regret_5; A score of 0 means no regret, while a score of 100 means high regret. A lower score indicates a better outcome.

Likert scale measuring confidence in managing patients with a family history of breast/ovarian cancer among health care provider participants. To compare between intervention and control group at baseline and six months Three questions ascertaining respondents' perceived level of confidence in their knowledge of medical statistics, ability to effectively communicate medical statistics to patients and/or families, and ability to help patients and/or families understand information about probabilities or risks.

6-point Likert scale: "Not at all" to "Extremely" confident. Analysis: mean scores, 0= "Not at all" confident - 5= "Extremely" Confident. A higher score indicates a better outcome.

Three "Agree/Disagree" statement and two multiple choice questions measuring BRCA genetic testing knowledge among health care provider participants. To compare between intervention and control group at baseline and 6 months.

Analysis: Number of multiple choice items answered correctly ( 0, 1, or 2 items answered correctly). Score range from 0-2. The higher the score, the greater the provider knowledge. A higher score indicates a better outcome.

Likert scale measuring attitudes held by health care provider participants regarding BRCA genetic testing. To compare between intervention and control group at baseline and 6 months.

One statement, 7 point Likert scale: 0="strongly disagree" - 6= "strongly agree" Analysis: High scores indicate stronger intention, perception of stronger social pressure, and perception of greater control. A higher score indicates a better outcome.

Likert scale measuring the extent to which a respondent believes that patients desire information and should be part of decision making process. Among health care provider participants. To compare between intervention and control group at baseline and 6 months.

9-item scale measuring the extent to which a respondent believes that patients desire information and should be part of the decision making process.

6-point Likert Scale: 0= "Strongly Disagree" - 5= "Strongly Agree" Analysis: Total score, score ranging from 0-45, lower score= patient centered, higher score= doctor-centered. The greater the change in orientation towards shared decision making, the better the outcome.

Likert scale measuring extent to which providers believe others would expect them to refer patients to BRCA genetic testing. For health care provider participants. To compare between intervention and control group at baseline and 6 months.

7 point item: 0= "Strongly disagree" - 6= "Strongly agree" Analysis: High scores indicate perception of stronger social pressure and indicates a better outcome.

Likert scale measuring extent to which providers believe they are able to refer patients to BRCA genetic testing. For provider participants. To compare between intervention and control group at baseline and 6 months.

7 point item: 0= "very difficult" - 6 = "very easy" Analysis: High scores indicate perception of greater control. A higher score indicates a better outcome.

Multiple choice measuring a providers intention to refer a patient to BRCA genetic testing. For health care provider participants. To compare between intervention and control group at baseline and 6 months.

7 point item: e.g. 0= very difficult - 6= very easy Analysis: High scores indicate stronger intention and better outcome.

The primary endpoint is to determine the uptake of genetic counseling for HBOC syndrome by 6 months in the intervention arm (RealRisks Decision Aid and BNAV toolbox) compared to the control arm (Standard educational materials)

The decisional conflict scale (DCS) measures personal perceptions of: uncertainty in choosing options; modifiable factors contributing to uncertainty such as feeling uninformed, unclear about personal values and unsupported in decision making; and effective decision making (in full version) such as feeling the choice is informed, values-based, likely to be implemented and expressing satisfaction with the choice.

It includes 10 yes/no items (0=yes, 2=unsure, 4=no). Analysis: Item scores are summed, divided by 10, and multiplied by 25. Scores range from 0 (no decisional conflict) to 100 (extremely high decisional conflict). A lower score indicates a better outcome.

The Shared Decision Making (SDM) questionnaire collects information on the process in which clinicians and patients work together to make decisions and select tests, treatments and care plans based on clinical evidence that balances risks and expected outcomes with patient preferences and values. It consists of 9 items with each item scored on a 6-point Likert scale (0=completely disagree to 5=Complete Agree) from the SDM-Q-9.

Analysis: A raw total score between 0 and 45 calculated by summing the scores of all items. If required, imputation of up to two missing items using the mean of the items that made up the raw score. For the standardization of the raw score, a linear transformation into a scale ranging from 0 to 100 (multiplication of the raw score by 20/9), with zero indicating the lowest level of perceived SDM and 100 indicating the highest level of perceived SDM (better outcome).

The degree to which a decision is based on relevant, good quality information, and reflects the decision-maker's values. To compare between the intervention and control group at 6 months. To be an informed choice, a patient needs a good knowledge score and a decision that is consistent with their attitude score. Analysis: Informed Choice= Good knowledge (score 50% and above) AND Positive Attitude (score 22 and above) AND positive decision ("I decided to get genetic testing" or "I was already tested"), OR Good knowledge AND Negative attitude (score 21 and below) AND negative decision ("I decided not to get genetic testing") Uninformed Choice: Poor knowledge, OR Good knowledge, but uptake inconsistent with attitudes Analysis: Uninformed Choice= Good knowledge (score 50% and above) AND Negative attitude AND positive decision OR Good knowledge AND Negative Attitude Score AND positive decision, OR Poor knowledge (49% and below).

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Precision-Based Magnesium Trial	NCT01105169	Colorectal Canc...	Magnesium glyci... Placebo	40 Years - 85 Years	Vanderbilt University Medical Center
Decision Support for BRCA Testing in Ethnically Diverse Women	NCT03470402	Breast Cancer BRCA1 Mutation BRCA2 Mutation Ovarian Cancer	RealRisks BNAV iNYP Standard Educat... High-Risk Messa...	21 Years - 75 Years	Columbia University

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