What are colorectal cancer survivors' preferences for dietary advice? A best-worst discrete choice experiment

Assessment of patients' preferences for new anticancer drugs in China: a best-worst discrete choice experiment on three common cancer types

OBJECTIVES

Despite the advancement in anticancer drug therapies, cancer treatment decisions are often complex and preference-sensitive, making them well suited for studying shared decision-making (SDM). Our study aimed to assess preferences for new anticancer drugs among three common types of patients with cancer to inform SDM.

DESIGN

We identified five attributes of new anticancer drugs and used a Bayesian-efficient design to generate choice sets for a best-worst discrete choice experiment (BWDCE). The mixed logit regression model was applied to estimate patient-reported preferences for each attribute. The interaction model was used to investigate preference heterogeneity.

SETTING

The BWDCE was conducted in Jiangsu province and Hebei province in China.

PARTICIPANTS

Patients aged 18 years or older, who had a definite diagnosis of lung cancer, breast cancer or colorectal cancer were recruited.

RESULTS

Data from 468 patients were available for analysis. On average, the most valued attribute was the improvement in health-related quality of life (HRQoL) (p<0.001). The low incidence of severe to life-threatening side effects, prolonged progression-free survival and the low incidence of mild to moderate side effects were also positive predictors of patients' preferences (p<0.001). Out-of-pocket cost was a negative predictor of their preferences (p<0.001). According to subgroup analysis by type of cancer, the improvement in HRQoL remained the most valuable attribute. However, the relative importance of other attributes varied by type of cancer. Whether patients were newly diagnosed or previously diagnosed cancer cases played a dominant role in the preference heterogeneity within each subgroup.

CONCLUSIONS

Our study can assist in the implementation of SDM by providing evidence on patients' preferences for new anticancer drugs. Patients should be informed of the multiattribute values of new drugs and encouraged to make decisions reflecting their values.

Can people living with and beyond colorectal cancer make lifestyle changes with the support of health technology: A feasibility study

BACKGROUND

Rates of cancer survival are increasing, with more people living with and beyond cancer. Lifestyle recommendations for cancer survivors are based largely on extrapolation from cancer prevention recommendations. This feasibility study was designed to investigate diet and physical activity variables linked to primary prevention and digital behaviour change interventions in cancer survivors and delivered by an oncology dietitian to plan for future research.

METHODS

In this 2-month feasibility study, participants who had completed treatment for colorectal cancer were invited to complete online food diaries, underwent physical activity assessment, attended fortnightly telephone consultations with an oncology dietitian and completed an evaluation form. The baseline food diaries were used to help participants pick two lifestyle changes to focus on throughout the intervention. Demographic and clinical data were analysed using descriptive statistics.

RESULTS

In total, 996 patients were screened for eligibility; of these, 78 were eligible to approach and 69 were approached, resulting in 20 participants consenting to take part. Overall, the intervention was acceptable with 65% of participants completing an online food diary and 70% engaging with the dietitian over the telephone. The intervention received good feedback, with 100% of those completing the evaluation form reporting they felt supported and found it helpful.

CONCLUSIONS

The present study offers preliminary evidence that a lifestyle intervention delivered by an oncology dietitian using digital behaviour change interventions (DBCIs) to cancer survivors is feasible and accepted by participants and providers.

Willingness to pay for cancer prevention, screening, diagnosis, and treatment: a systematic review

INTRODUCTION

Willingness to pay (WTP) studies examine the maximum amount of money an individual is willing to pay for a specified health intervention, and can be used to inform coverage and reimbursement decisions. Our objectives were to assess how people value cancer-related interventions, identify differences in the methodologies used, and review the trends in studies' publication.

AREAS COVERED

We extracted PubMed and EconLit articles published in 1997-2020 that reported WTP for cancer-related interventions, characterized the methodological differences and summarized each intervention's mean and median WTP values. We reviewed 1,331 abstracts and identified 103 relevant WTP studies, of which 37 (36%) focused on treatment followed by screening (26), prevention (21), diagnosis (7) and other interventions (12). The methods used to determine WTP values were primarily discrete-choice questions (n = 54, 52%), bidding games (15), payment cards (12) and open-ended questions (12). We found a wide variation in WTP reported values ranged from below $100 to over $20,000.

EXPERT OPINION

The WTP literature on oncology interventions has grown rapidly. There is considerable heterogeneity with respect to the type of interventions and diseases assessed, the respondents' characteristics, and the study methodologies. This points to the need to establish international guidelines for best practices in this field.

Patient preferences for lifestyle behaviours in osteoporotic fracture prevention: a cross-European discrete choice experiment

Using a discrete choice experiment, we aimed to assess patients' preferences with regard to adopting lifestyle behaviours to prevent osteoporotic fractures. Overall, the 1042 patients recruited from seven European countries were favourable to some lifestyle behaviours (i.e., engaging in moderate physical activity, taking calcium and vitamin D supplements, reducing their alcohol consumption and ensuring a normal body weight).

INTRODUCTION

Alongside medical therapy, healthy lifestyle habits are recommended for preventing osteoporotic fractures. In this study, we aimed to assess patients' preferences with regard to adopting lifestyle changes to prevent osteoporotic fractures.

METHODS

A discrete choice experiment was conducted in seven European countries. Patients with or at risk of osteoporosis were asked to indicate to what extent they would be motivated to adhere to 16 lifestyle packages that differed in various levels of 6 attributes. The attributes and levels proposed were physical activity (levels: not included, moderate or high), calcium and vitamin D status (levels: not included, taking supplements, improving nutrition and assuring a minimal exposure to sunlight daily), smoking (levels: not included, quit smoking), alcohol (levels: not included, moderate consumption), weight reduction (levels: not included, ensure a healthy body weight) and fall prevention (levels: not included, receiving general advice or following a 1-day fall prevention program). A conditional logit model was used to estimate a patient's relative preferences for the various attributes across all participants and per country.

RESULTS

In total, 1042 patients completed the questionnaire. Overall, patients were favourable to lifestyle behaviours for preventing osteoporotic fractures. However, among the lifestyle behaviours proposed, patients were consensually not prone to engage in a high level of physical activity. In addition, in Ireland, Belgium, the Netherlands and Switzerland, patients were also not inclined to participate in a 1-day fall prevention program and Belgian, Swiss and Dutch patients were not prone to adhere to a well-balanced nutritional program. Nevertheless, we observed globally that patients felt positively about reducing their alcohol consumption, engaging in moderate physical activity, taking calcium and vitamin D supplements and ensuring a normal body weight, all measures aimed at preventing fractures.

CONCLUSIONS

In a patient-centred approach, fracture prevention should take these considerations and preferences into account.

Systematic Review of Behaviour Change Theories Implementation in Dietary Interventions for People Who Have Survived Cancer

Background: An increasing number of dietary interventions for cancer survivors have been based on the behaviour change theory framework. The purpose of this study is to review the use and implementation of behaviour change theories in dietary interventions for people after cancer and assess their effects on the reported outcomes. Methods: The search strategy from a Cochrane review on dietary interventions for cancer survivors was expanded to incorporate an additional criterion on the use of behaviour change theory and updated to September 2020. Randomised controlled trials (RCT) testing a dietary intervention compared to the control were included. Standard Cochrane methodological procedures were used. Results: Nineteen RCTs, with 6261 participants (age range 44.6 to 73.1 years), were included in the review. The Social Cognitive Theory was the most frequently used theory (15 studies, 79%). Studies included between 4 to 17 behaviour change techniques. Due to limited information on the mediators of intervention and large heterogeneity between studies, no meta-analyses was conducted to assess which theoretical components of the interventions are effective. Conclusions: Whilst researchers have incorporated behaviour change theories into dietary interventions for cancer survivors, due to inconsistencies in design, evaluation and reporting, the effect of theories on survivors’ outcomes remains unclear.

Needs, preferences, and experiences of adult cancer survivors in accessing dietary information post-treatment: A scoping review

INTRODUCTION

To support provision of healthy lifestyle information tailored to patients' needs and preferences, this review maps adult cancer survivors' self-reported needs, preferences, and experiences accessing dietary information post-treatment.

METHODS

A scoping review of research published within the past decade conducted using PRISMA-ScR guidelines. Seven databases were searched in June 2020.

RESULTS

Of 15,973 articles identified, 57 met eligibility criteria. Studies most frequently included survivors of breast cancer (49%), persons aged 40+ years (95%), ≤5 years post-diagnosis (54%), and residing in North America (44%). Cancer survivors commonly identified needing information regarding healthy eating, particularly practical skills, and support in changing dietary behaviours. Preferences included specific recommendations, direct communication with healthcare professionals, and peer support from other cancer survivors. In practice, survivors frequently reported receiving generic advice from healthcare professionals, limited dietary follow-up, and lack of referral to support. Unmet needs in healthcare settings led to dietary information-seeking elsewhere; however, survivors indicated difficulty identifying credible sources. Personal beliefs and desire for involvement in care motivated dietary information-seeking post-treatment.

CONCLUSION

Cancer survivors' experiences accessing dietary information post-treatment do not align with needs and preferences. Less is known about survivors who are young adults, >5 years post-diagnosis, and living in rural areas.

Healthy Eating and Active Lifestyle After Bowel Cancer (HEAL ABC): feasibility randomised controlled trial protocol

Background

Targeting modifiable lifestyle factors including diet and physical activity represents a potentially cost-effective strategy that could support a growing population of colorectal cancer survivors and improve their health outcomes. Currently, effective, evidence-based interventions and resources helping people after bowel cancer to adopt new lifestyle habits are lacking. The aim of this trial is to test the Healthy Eating and Active Lifestyle After Bowel Cancer (HEAL-ABC) intervention to inform a future definitive randomised controlled trial.

Methods/design

This is a feasibility randomised controlled trial. A total of 72 survivors who have completed surgery and all anticancer treatments will be recruited. The intervention group will receive HEAL-ABC resources based on behaviour change theory combined with supportive telephone calls informed by motivational interviewing every 2 weeks during the 3-month intervention, and once a month for 6 months to follow-up. Participants in the control group will follow usual care and have access to resources available in the public domain. The study is testing feasibility of the intervention including adherence and ability to collect data on anthropometry, body composition, diet, physical activity, behaviour change, quality of life, blood markers, contact with healthcare services, morbidities and overall survival.

Discussion

The proposed study will add to the evidence base by addressing an area where there is a paucity of data. This study on lifestyle interventions for people after colorectal cancer follows the Medical Research Council guidance on evaluating complex interventions in clinical practice. It focuses on people living after treatment for colorectal cancer and targets an important research area identified by cancer survivors as a research priority reported by the National Cancer Institute and James Lind Alliance UK.

Trial registration

ClinicalTrials.gov NCT04227353 approved on the 13th of January 2020

Supplementary Information

The online version contains supplementary material available at 10.1186/s40814-020-00721-y.

Investigating the nutritional advice and support given to colorectal cancer survivors in the UK: is it fit for purpose and does it address their needs?

BACKGROUND

The present study assessed the quantity and quality of nutritional advice and support given to colorectal cancer survivors in the UK.

METHODS

A descriptive cross-sectional survey was completed by 75 colorectal cancer survivors recruited through social media and bowel cancer support groups in the UK. The survey consisted of open-ended and closed questions that aimed to explore the nutritional needs, nutritional advice given and other sources of information accessed by colorectal cancer survivors.

RESULTS

Sixty-nine percent of respondents reported that they did not receive any nutritional advice or support from their healthcare team throughout diagnosis, treatment and post-treatment. Colorectal cancer survivors accessed nutritional advice from a variety of sources, mainly cancer charity websites. Respondents expressed their desire for individualised advice relating to their nutritional problems.

CONCLUSIONS

The results obtained in the present study indicate that a high proportion of colorectal cancer patients are not receiving the nutritional support that they need to overcome nutritional difficulties. There is an urgent need to improve clinical practice to ensure colorectal patients receive nutritional advice that is both consistent between healthcare professionals and personalised throughout each stage of diagnosis, treatment and post-treatment.

Prostate cancer survivors' preferences on the delivery of diet and lifestyle advice: a pilot best-worst discrete choice experiment

Background

Lifestyle factors, including diet and physical activity, are associated with prostate cancer progression and mortality. However, it is unclear how men would like lifestyle information to be delivered following primary treatment. This study aimed to identify men’s preferences for receiving lifestyle information.

Methods

We conducted a cross-sectional pilot best-worst discrete choice experiment which was nested within a feasibility randomised controlled trial. Our aim was to explore men’s preferences of receiving diet and physical activity advice following surgery for localised prostate cancer. Thirty-eight men with a mean age of 65 years completed best-worst scenarios based on four attributes: (1) how information is provided; (2) where information is provided; (3) who provides information; and (4) the indirect cost of receiving information. Data was analysed using conditional logistic regression. Men’s willingness to pay (WTP) for aspects of the service was calculated using an out-of-pocket cost attribute.

Results

The combined best-worst analysis suggested that men preferred information through one-to-one discussion β = 1.07, CI = 0.88 to 1.26) and not by email (β = − 1.02, CI = − 1.23 to − 0.80). They preferred information provided by specialist nurses followed by dietitians (β = 0.76, CI = 0.63 to 0.90 and − 0.16, CI = − 0.27 to − 0.05 respectively) then general nurses (β = − 0.60, CI = − 0.73 to − 0.48). Three groups were identified based on their preferences. The largest group preferred information through individual face-to-face or group discussions (β = 1.35, CI = 1.05 to 1.63 and 0.70, CI = 0.38 to 1.03 respectively). The second group wanted information via one-to-one discussions or telephone calls (β = 1.89, CI = 1.41 to 2.37 and 1.03, CI = 0.58 to 1.48 respectively), and did not want information at community centres (β = − 0.50, CI = − 0.88 to − 0.13). The final group preferred individual face-to-face discussions (β = 0.45, CI = 0.03 to 0.88) but had a lower WTP value (£17).

Conclusions

Men mostly valued personalised methods of receiving diet and physical activity information over impersonal methods. The out-of-pocket value of receiving lifestyle information was important to some men. These findings could help inform future interventions using tailored dietary and physical activity advice given to men by clinicians following treatment for prostate cancer, such as mode of delivery, context, and person delivering the intervention. Future studies should consider using discrete choice experiments to examine information delivery to cancer survivor populations.

Exploring Views of Healthcare Professionals, Researchers, and People Living with and beyond Colorectal Cancer on a Healthy-Eating and Active Lifestyle Resource

BACKGROUND

People after bowel cancer are at high risk of cancer recurrences and co-morbidities, and therefore strategies are needed to reduce these risks. One promising strategy targets modifiable lifestyle factors including diet and physical activity. However, effective, evidence-based resources in adopting new lifestyle habits are currently lacking.

METHODS

The Healthy-Eating and Active Lifestyle After Bowel Cancer (HEAL ABC) resource was developed incorporating behavior change theory and World Cancer Research Fund and American Institute of Cancer Research guidelines. Focus groups and telephone interviews were conducted with professionals and survivors (age ≥18 years) to obtain feedback on the resource layout, structure, and content. Recorded data were transcribed verbatim and analyzed using framework analysis.

RESULTS

Thirty participants evaluated the resource-19 cancer survivors and 11 professionals. Survivors' mean age was 62 years (SD 11.5), 11 (58%) were females and 8 (42%) were male. Professionals were all females and mean age was 40 years (SD 6.06). Both survivors and professionals evaluated the resource as useful and provided suggestions for improvements.

CONCLUSIONS

HEAL ABC is an evidence-based resource designed to aid cancer survivors in translating their motivation into action. It was valued positively by both survivors and healthcare professionals and viewed as filling a gap in post-treatment advice.

Head and neck cancer survivors' preferences for and evaluations of a post-treatment dietary intervention

BACKGROUND

Dietary preferences vary depending on cancer type. The purpose of this study was to report dietary intervention preferences and a study program evaluation from post-treatment head and neck cancer survivors participating in a dietary intervention.

METHODS

Between January 2015 and August 2016, 24 head and neck cancer survivors participated in a 12-week randomized clinical dietary intervention trial that promoted weekly consumption of 2.5 cups of cruciferous vegetables and 3.5 cups of green leafy vegetables. At study completion, survivors completed a preferences survey and a study program evaluation to probe interests and improvement aspects for planning future dietary intervention trials. Descriptive statistics (means and frequencies) were generated for multiple choice question responses. Responses to open-ended questions were recorded and grouped based on themes, and verified by quality assurance checks by a second study team member.

RESULTS

Twenty-three survivors completed the preferences and evaluation surveys (response rate 96%). Overall, most participants reported a preference for one-on-one telephone counseling from a registered dietitian nutritionist before beginning treatment. Ninety-six percent of participants ranked the overall study program as "very good" to "excellent," and all agreed the objectives of the study were clear, the study staff was helpful and easy to contact, and the registered dietitian nutritionist was knowledgeable.

CONCLUSIONS

Future research and dietary intervention planning for head and neck cancer survivors should focus on strategies to promote one-on-one telephone or other distance-based counseling combined with face-to-face visits, according to survivor preference.

Information needs and information seeking behaviour of patients during follow-up of colorectal cancer in the Netherlands

Purpose

Adequately informing patients is considered crucial in cancer care, but need for information and information seeking behaviour of colorectal cancer (CRC) patients in the Netherlands are currently not well known.

Methods

In a prospective study, patients participating in a specialty, hospital-based follow-up program completed three consecutive surveys over a 6-month period to analyse their information need and information seeking behaviour.

Results

Patients (n = 259) felt well informed about their treatment (86%), disease (84%), and follow-up program (80%), but less well informed about future expectations (49%), nutrition (43%), recommended physical activity (42%), and heredity of cancer (40%). The need for more information on these subjects remained constant over the first five postoperative years. Patients who were younger, who had undergone chemotherapy, or who had comorbid conditions needed more information on several subjects. One in three patients searched for information themselves, mostly on the Internet. One in four patients consulted a health care provider for information, mostly their GP. Younger and more educated patients more often searched for information themselves, while patients undergoing chemotherapy more often consulted the hospital nurse. Information seeking behaviour remained constant over time.

Conclusions

This study showed where current information provision is perceived as adequate and on which subject improvements can be made. It identifies information seeking behaviour and proposes ways to personalize information provision.

Implications for Cancer Survivors

The GP is most frequently consulted for information; involving GPs in CRC follow-up could improve information provision on several subjects for several patients.

Colorectal cancer survivors' beliefs on nutrition and cancer; correlates with nutritional information provision

Purpose

To investigate CRC survivors’ beliefs on nutrition and cancer and the association with nutritional information provision by (kind and number) of health professionals and to inquire about foods that CRC survivors believed either had a positive or negative influence on their cancer.

Methods

A total of 326 CRC survivors of an ongoing prospective cohort study filled out questionnaires 1 month after surgery on whether they had received nutritional information from health professionals. Also, their beliefs that nutrition influences (1) feelings of well-being, (2) complaints after treatment, (3) recovery and (4) cancer recurrence were investigated. Prevalence ratios were calculated (using Cox proportional hazard regression analysis) to study associations between information provision and the four beliefs adjusted for age, gender and cancer stage.

Results

Sixty-two percent of respondents received information about nutrition from one or more health professionals. Most respondents who received information strongly believe nutrition influences feelings of well-being (59%) and recovery after cancer (62%). Compared with those who did not receive information, respondents who received information from three professionals showed the strongest beliefs on the influence of nutrition on complaints after treatment (PR 3.4; 95% CI 1.6–7.4), recovery after treatment (PR 2.0; 95% CI 1.2–3.3) and recurrence (PR 2.8; 95% CI 1.3–6.2).

Conclusion

Nutritional information provision by health professionals positively influences the beliefs of CRC survivors on the influence of nutrition on cancer outcomes: stronger beliefs occur when respondents received information from three health professionals.

Healthy eating interventions in adults living with and beyond colorectal cancer: a systematic review

BACKGROUND

Rates of cancer survival are increasing, with more people living with and beyond cancer. Lifestyle recommendations for cancer survivors are based largely on extrapolation from cancer prevention recommendations. The present study aimed to systematically review the literature on randomised controlled trials (RCTs) focusing on healthy eating interventions in people with colorectal cancer (CRC).

METHODS

A structured search of electronic databases was conducted in March 2018 using medical subject headings (MeSH) and text words related to CRC and diet. The results of the literature searches were uploaded to online software for data management. Titles and abstracts were screened based on the inclusion and exclusion criteria and data were extracted. Quality of data was assessed using the Cochrane Handbook.

RESULTS

Seven studies were identified, including six RCTs and one RCT protocol, with a total of 2233 participants from six studies, of whom 1010 (45%) had CRC. Three studies assessed anthropometrics demonstrating participants who received dietary intervention had a greater reduction in measurements. Six studies assessed changes in dietary components; however, only one demonstrated an increase in dietary fibre. Two studies reported improvements in quality of life favouring dietary intervention groups.

CONCLUSIONS

The quality of identified studies was variable, with limited evidence to support dietary intervention improving dietary intake in people living with or after CRC. Studies to date have not been based on robust study design that has combined all dietary interventions linked to CRC. As a result of the heterogeneity of the studies identified, it was difficult to draw strong conclusions.

Dietary interventions for cancer survivors

This review evaluates evidence on dietary interventions for cancer survivors giving an overview of people's views and preferences for service attributes and provides a narrative review. After cancer, people often want to change their diet and there is a plethora of evidence why dietary optimisation would be beneficial. However, cancer survivors have different preferences about attributes of services including: place, person and communication mode. Randomised control trials have been reviewed to provide a narrative summary of evidence of dietary interventions. Most studies were on survivors of breast cancer, with a few on colorectal, prostate and gynaecological survivors. Telephone interventions were the most frequently reported means of providing advice and dietitians were most likely to communicate advice. Dietary assessment methods used were FFQ, food diaries and 24-h recalls. Dietary interventions were shown to increase intake of fruit and vegetables, dietary fibre, and improve diet quality in some studies but with contradictory findings in others. Telephone advice increased fruit and vegetable intake primarily in women with breast cancer and at some time points in people after colorectal cancer, but findings were inconsistent. Findings from mail interventions were contradictory, although diet quality improved in some studies. Web-based and group sessions had limited benefits. There is some evidence that dietary interventions improve diet quality and some aspects of nutritional intake in cancer survivors. However, due to contradictory findings between studies and cancer sites, short term follow-up and surrogate endpoints it is difficult to decipher the evidence base.