Recent Progress in Mind-Body Therapies in Cancer Care.

PURPOSE OF REVIEW: Mind-body therapies (MBTs) are integrative medicine modalities that continue to grow in popularity among people with cancer. MBTs are used to enhance well-being and most commonly include relaxation and imagery, hypnosis, yoga, meditation, Tai Chi and Qigong, and creative therapies. Biofield and psychedelic-assisted therapies are also gaining momentum as MBTs. Herein, recent literature was narratively reviewed to summarize the effectiveness of these MBTs within the context of cancer care. RECENT FINDINGS: There is growing evidence for the effectiveness of MBTs for addressing a myriad of physical (e.g., pain) and psychosocial (e.g., depression, fatigue) symptoms and biomarkers of stress and immune function in people with cancer. Psychedelic-assisted therapies have robust, sustained effects on symptoms of depression, anxiety, and distress in small clinical trials to date. However, across modalities, MBT studies continue to struggle with methodological issues such as intervention standardization, facilitator training, small sample sizes, and short follow-up. Accumulating evidence supports the use of MBTs for people with cancer. Future research should work to address methodological issues and focus on creating knowledge translation tools; these can be leveraged to better educate health care providers and patients regarding evidence-based MBT options to support patients in making informed decisions about their health.

The Chemo-Gut Study: A Cross-Sectional Survey Exploring Physical, Mental, and Gastrointestinal Health Outcomes in Cancer Survivors.

Background: Cancer treatments, such as chemotherapy, may adversely affect gastrointestinal (GI), physical and mental health in survivors of cancer. Objective: This study investigated associations between GI, mental and physical health outcomes, and cancer treatment-related variables, such as chemotherapy, in adult cancer survivors. Methods: A one-time cross-sectional survey with patient-reported outcomes was used. Cancer survivors (N = 317) aged ≥18 years, living in Canada, who completed cancer treatments were included. Descriptive statistics, correlation, and linear regression analyses are reported. Results: Mean age at diagnosis was 40.90 ± 15.40 years. Most survivors received chemotherapy (86.1%). Persistent GI symptoms include constipation (53.6%), diarrhea (50.5%), and bloating/pain (54.9%). Mean GI symptom duration was 30.53 ± 33.42 months. Severity of GI symptom interference was moderate to extreme for 51.9% of survivors. Compared to normative values of 50 in healthy people, survivors scored poorer for mental health (M = 42.72 ± 8.16) and physical health (M = 45.55 ± 7.93), and reported more belly pain (M = 56.10 ± 8.58), constipation (M = 54.38 ± 6.81), diarrhea (M = 55.69 ± 6.77), and gas/bloating (M = 56.08 ± 8.12). Greater GI symptom severity was associated with poorer mental and physical health (P < .01). Chemotherapy was associated with increased belly pain (B = 4.83, SE = 1.65, P < .01) and gas/bloating (B = 3.06, SE = 1.45, P = .04). Conclusion: We provide novel evidence that many cancer survivors experience chronic, moderate to severe GI symptoms lasting for years after cancer treatment, which are associated with worse mental and physical health. Chemotherapy is associated with specific GI symptoms. Integrative therapies are needed to address GI symptoms in cancer survivors.

Proof of Concept for a Mindfulness-Informed Intervention for Eating Disorder Symptoms, Self-Efficacy, and Emotion Regulation among Bariatric Surgery Candidates.

Up to 64% of patients seeking bariatric (weight-loss) surgery report eating disorder (ED) symptoms (addictive-like eating, binge eating, emotional eating, grazing) that can interfere with post-surgical weight loss. This prospective proof-of-concept study aimed to evaluate the impact of a pre-surgical mindfulness-informed intervention (MII) on ED symptoms and potential mechanisms-of-action to inform optimization of the intervention. Surgery-seeking adults attended four, 2-hour, MII sessions held weekly. Participants completed validated questionnaires assessing ED symptoms, eating self-efficacy, emotion regulation, and mindful eating pre-MII, post-MII, and at a 12-week follow-up. The MII consisted of mindfulness training, with cognitive, behavioral, and psychoeducational components. Fifty-six patients (M = 47.41 years old, 89.3% female) participated. Improvements in addictive-like eating, binge eating, emotional eating, and grazing were observed from pre- to post-MII. ED symptom treatment gains were either maintained or improved further at 12-week follow-up. Eating self-efficacy and emotion regulation improved from pre-MII to follow-up. Scores on the mindful eating questionnaire deteriorated from pre-MII to follow-up. In mediation analyses, there was a combined indirect effect of emotion regulation, eating self-efficacy, and mindful eating on grazing and binge eating, and an indirect effect of emotion regulation on emotional eating and addictive-like eating. Participation in the MII was associated with improvements in ED symptoms and some mechanisms-of-action, establishing proof-of-concept for the intervention. Future work to establish the MII's efficacy in a randomized controlled trial is warranted.

A Survey of Potentially Modifiable Patient-Level Factors Associated with Self-Report and Objectively Measured Adherence to Adjuvant Endocrine Therapies After Breast Cancer.

PURPOSE: Despite the efficacy of adjuvant endocrine therapy (AET) in reducing breast cancer recurrence and mortality, suboptimal AET adherence is common and hence an important clinical issue among breast cancer survivors. Delineating potentially modifiable patient-level factors associated with AET adherence may support the development of successful adherence-enhancing interventions. PATIENTS AND METHODS: The present study included 133 breast cancer survivors prescribed AET recruited from a cancer pharmacy. Women completed a baseline questionnaire examining psychosocial factors and self-reported adherence and consented to their prescription records being monitored for the proceeding 12 months to ascertain proportion of days covered (PDC), an objective measure of adherence. Regression analyses were used to identify the factors most strongly associated with both self-reported and objective adherence. Exploratory moderation analyses examined whether factors were differentially associated with adherence based on AET type (aromatase inhibitors or tamoxifen). RESULTS: Adherence was high in this sample (PDC over 12 months was 95%). Side effect severity was most strongly associated with self-reported adherence, followed by self-efficacy, and medication/healthcare system-related barriers. Medication/healthcare system-related barriers was the only factor that uniquely predicted objective adherence. Within medication/healthcare system-related barriers, fear of side effects was most strongly associated with both measures of adherence. There were no significant interactions between AET type and potentially modifiable factors in predicting self-reported or objective adherence. CONCLUSION: Side effects, reactions to side effects, and self-efficacy may represent modifiable targets through which AET adherence can be improved. Associations between potentially modifiable factors and adherence did not vary by AET type, despite distinct side-effect profiles.

Both "Vitamin L for Life" and "One Milligram of Satan": A Multi-Perspective Qualitative Exploration of Adjuvant Endocrine Therapy Use after Breast Cancer.

Adjuvant endocrine therapy (AET) is recommended after hormone receptor-positive breast cancer to reduce risk of recurrence, but adherence is sub-optimal in many women. Behavioral interventions have been ineffective in improving adherence rates to AET. This qualitative descriptive study investigates factors that support women in AET use and suggestions for interventions to improve AET use and management. Interviews with women who persisted with AET (n = 23), women who discontinued AET (n = 15), and healthcare providers (HCPs; oncologists, oncology residents, and pharmacists; n = 9) were conducted, transcribed, and described using thematic analysis. Data collection stopped once saturation occurred (i.e., no new codes or themes emerged during interviews). Two researchers created codes and developed themes in an iterative process; a third researcher verified the representativeness of final themes. This study was approved by the Health Research Ethics Board of Alberta (ID: HREBA.CC-17-0513). Women who persisted described being prepared for side effects and having self-management strategies, strong rationale for AET use, supportive HCPs, and available resources as relevant factors. Women who discontinued described feeling overwhelmed by side effects, information needs, drawbacks of AET, helpful/unhelpful experiences with HCPs, and contextual factors as relevant to their discontinuation. HCPs described health system-related and patient-related barriers, side effect management, and patient-provider interactions as relevant to supporting AET use. The considerable overlap in themes among the three groups suggests broad recognition of salient factors relevant to AET use and that associated strategies to improve use may be acceptable to patients and providers alike. Factors supporting AET use could include the following: education (which may be necessary but insufficient), developing a strong personal rationale for use, being prepared for side effects, having side effect management strategies, reciprocal communication between patients and HCPs, and accessible resources.

Impact of Vulvovaginal Symptoms in Women Diagnosed with Cancer: A Psychometric Evaluation of the Day-to-Day Impact of Vaginal Aging Questionnaire.

Background: Vulvovaginal symptoms (VVS), such as dyspareunia, dryness, and itching, are common following cancer treatment and can negatively impact sexual well-being, daily activities, mood, self-concept, and overall quality of life. Information about the impact of VVS after cancer treatment is scarce, mainly because of a dearth of validated measures. This study aimed to validate the Day-to-Day Impact of Vaginal Aging (DIVA) questionnaire, which assesses impact of VVS on women's lives, in a sample of women with cancer. Methods: Women diagnosed with cancer (n = 202) completed a questionnaire package, including the DIVA and measures of VVS, sexual function, and sexual distress. Data were collected as part of study evaluating an educational workshop. Confirmatory factor analysis (CFA) was used to examine whether the factor structure of the DIVA in this population reflected that of the original validation study. Results: CFA showed that the DIVA assesses VVS impact on four domains: activities of daily living, sexual functioning, emotional well-being, and self-concept and body image. All subscales showed excellent internal consistency reliability; however, item analyses indicated that items in the activities of daily living subscale showed very low means. Correlations with sexual function and distress provided evidence that the DIVA assesses impact of VVS. Conclusions: This is the first study aimed at validating the DIVA in women treated for cancer. Results provide evidence of the DIVA's utility in assessing the impact of VVS on four relevant domains. Although issues with certain scale items need to be resolved in future research, the DIVA provides opportunity to understand the impact of VVS after cancer treatment, to address unmet needs of cancer survivors.

No effect of mindfulness-based cancer recovery on cardiovascular or cortisol reactivity in female cancer survivors.

Psychosocial stress in cancer survivors may contribute to compromised quality of life and negative cancer outcomes, which can be exacerbated by poor coping skills and emotional reactivity. Mindfulness based interventions (MBIs) have shown effectiveness in reducing stress, improving quality of life and coping skills in cancer survivors. We tested whether an MBI would also improve reactivity to an acute laboratory stress task. A total of 77 women with a cancer diagnosis were recruited for a waitlist-controlled trial of Mindfulness-Based Cancer Recovery (MBCR). Participants completed a laboratory-based psychosocial stress paradigm (the Trier Social Stress Test-TSST) pre- and post-intervention, throughout which cortisol and cardiovascular profiles were measured. Neither cortisol nor cardiovascular reactivity to the TSST was changed pre-to post intervention, either between or within groups. Blunted cortisol, but not cardiovascular, reactivity was observed across both groups, which may have contributed to the lack of intervention effect. Previous research suggests that diurnal cortisol is blunted following cancer treatment; the current findings suggest this blunting may also occur during exposure to acute stress.

Potentially Modifiable Factors Associated with Adherence to Adjuvant Endocrine Therapy among Breast Cancer Survivors: A Systematic Review.

Adjuvant endocrine therapy (AET) reduces risk of breast cancer recurrence. However, suboptimal adherence and persistence to AET remain important clinical issues. Understanding factors associated with adherence may help inform efforts to improve use of AET as prescribed. The present systematic review examined potentially modifiable factors associated with adherence to AET in accordance with PRISMA guidelines (PROSPERO registration ID: CRD42019124200). All studies were included, whether factors were significantly associated with adherence or results were null. This review also accounted for the frequency with which a potentially modifiable factor was examined and whether univariate or multivariate models were used. This review also examined whether methodological or sample characteristics were associated with the likelihood of a factor being associated with AET adherence. A total of 68 articles were included. Potentially modifiable factors were grouped into six categories: side effects, attitudes toward AET, psychological factors, healthcare provider-related factors, sociocultural factors, and general/quality of life factors. Side effects were less likely to be associated with adherence in studies with retrospective or cross-sectional than prospective designs. Self-efficacy (psychological factor) and positive decisional balance (attitude toward AET) were the only potentially modifiable factors examined ≥10 times and associated with adherence or persistence ≥75% of the time in both univariate and multivariate models. Self-efficacy and decisional balance (i.e., weight of pros vs. cons) were the potentially modifiable factors most consistently associated with adherence, and hence may be worth focusing on as targets for interventions to improve AET adherence among breast cancer survivors.

Integrative Approaches to Stress Management.

This narrative review provides an overview of the scope of psychosocial distress and stress in cancer patients and survivors and the potential negative consequences of untreated symptoms. Evidence-based interventions to treat these symptoms are reviewed, beginning with a summary of published clinical practice guidelines, followed by more detailed reviews of the specific integrative interventions with the largest empirical support: cognitive-behavioral stress management, yoga, mindfulness-based interventions, and massage. We also comment on use of natural health products because of their popularity. Finally, we conclude with recommendations to improve the quality of research in integrative interventions for stress management.

Prevalence of psychosocial distress in cancer patients across 55 North American cancer centers.

Routine distress screening in United States oncology clinics has been mandatory since 2015. OBJECTIVE: This study was the first to assess distress in a geographically diverse sample of cancer patients following mandated distress screening implementation by oncology social workers. METHODS: Sites were self-selected via social workers who applied to participate in the Association of Oncology Social Work's Project to Assure Quality Cancer Care, advertised through their social media outlets and conference. Electronic screening records were collected from 55 cancer treatment centers in the United States and Canada. Cases required cancer diagnoses and Distress Thermometer (DT) scores to be included. Distress rates and rates by age, sex, cancer type, and ethnicity were examined. RESULTS: Of 4664 cases, 46% (2157) experienced significant distress (DT score ≥ 4). Being female, age 40-59, and having diagnoses of pancreatic or lung cancer was associated with increased likelihood of distress. Half of cases experience clinically-significant distress, though this need was not evenly distributed across patient or cancer types. CONCLUSION: Identifying those at risk for distress may help inform optimal resource allocation. Methods to address needs of distressed patients in cases of limited resources are discussed.

The Role of Hypnosis in Cancer Care.

PURPOSE OF REVIEW: This paper reviews the current evidence-base for the use of hypnosis as an adjunct treatment for common cancer-related symptoms and side effects, including those experienced during treatment, as well as long-term and late effects. First, a general description and history of medical hypnosis in cancer care is provided, followed by a review of the latest evidence across a range of common symptoms. RECENT FINDINGS: The evidence suggests that hypnosis may help treat symptoms of nausea and vomiting in breast cancer patients, manage pain in a variety of contexts, and also reduce levels of anxiety and overall distress around surgical and medical procedures, both in children and adults. Emerging research shows promise for treating hot flashes in women with breast cancer. The research in this area would benefit from assessing populations beyond women with breast cancer, including late-stage disease, using more rigorous study designs, following published reporting guidelines and better describing and standardizing interventions.

Open to Exploration? Association of Personality Factors With Complementary Therapy Use After Breast Cancer Treatment.

PURPOSE: Many cancer survivors seek complementary therapies (CTs) to improve their quality of life. While it is well-known that women who are younger, more highly educated, and have higher incomes are more likely to use CTs, individual differences such as personality factors have been largely unexplored as predictors of CT use. METHODS: In a secondary analysis of a larger study, 270 women with stage I to III breast cancer completed self-report measures of demographic and illness-related information, personality variables, and use of several different types of CTs. A series of logistic regression models were used to explore whether demographic, illness-related, and personality variables predicted different types of CT use. RESULTS: Prior relationships between education and CT use were replicated. There were no significant relationships between illness-related variables and different types of CT use. Of the 5 personality factors, only openness to experience was a significant predictor of multiple types of CT use. CONCLUSIONS: Openness to experience may represent an individual difference variable that predicts CT use among cancer survivors. CTs themselves may represent a form of intellectual curiosity and novelty seeking. Further studies are needed to replicate and examine the generalizability of the relationship between openness to experience and CT use in oncology populations.

Web-Based Mindfulness Interventions for People With Physical Health Conditions: Systematic Review.

BACKGROUND: Mindfulness-based interventions (MBIs) are becoming increasingly popular for helping people with physical health conditions. Expanding from traditional face-to-face program delivery, there is growing interest in Web-based application of MBIs, though Web-based MBIs for people with physical health conditions specifically have not been thoroughly reviewed to date. OBJECTIVE: The objective of this paper was to review Web-based MBIs for people with physical health conditions and to examine all outcomes reported (eg, efficacy or effectiveness for physical changes or psychological changes; feasibility). METHODS: Databases PubMed, PsycINFO, Science Direct, CINAHL Plus, and Web of Science were searched. Full-text English papers that described any Web-based MBI, examining any outcome, for people with chronic physical health conditions were included. Randomized, nonrandomized, controlled, and uncontrolled trials were all included. Extracted data included intervention characteristics, population characteristics, outcomes, and quality indicators. Intervention characteristics (eg, synchronicity and guidance) were examined as potential factors related to study outcomes. RESULTS: Of 435 publications screened, 19 published papers describing 16 studies were included. They examined Web-based MBIs for people with cancer, chronic pain or fibromyalgia, irritable bowel syndrome (IBS), epilepsy, heart disease, tinnitus, and acquired brain injury. Overall, most studies reported positive effects of Web-based MBIs compared with usual care on a variety of outcomes including pain acceptance, coping measures, and depressive symptoms. There were mixed results regarding the effectiveness of Web-based MBIs compared with active control treatment conditions such as cognitive behavioral therapy. Condition-specific symptoms (eg, cancer-related fatigue and IBS symptoms) targeted by treatment had the largest effect size improvements following MBIs. Results are inconclusive regarding physical variables. CONCLUSIONS: Preliminary evidence suggests that Web-based MBIs may be helpful in alleviating symptom burden that those with physical health conditions can experience, particularly when interventions are tailored for specific symptoms. There was no evidence of differences between synchronous versus asynchronous or facilitated versus self-directed Web-based MBIs. Future investigations of Web-based MBIs should evaluate the effects of program adherence, effects on mindfulness levels, and whether synchronous or asynchronous, or facilitated or self-directed interventions elicit greater improvements.

Mind-Body Therapies in Cancer: What Is the Latest Evidence?

PURPOSE OF REVIEW: Many people living with cancer use complementary therapies, and some of the most popular are mind-body therapies (MBTs), including relaxation and imagery, hypnosis, yoga, meditation, tai chi and qigong, and art therapies. The efficacy of these modalities was reviewed by assessing recent findings in the context of cancer care. RECENT FINDINGS: These therapies show efficacy in treating common cancer-related side effects, including nausea and vomiting, pain, fatigue, anxiety, depressive symptoms and improving overall quality of life. Some also have effects on biomarkers such as immune function and stress hormones. Overall studies lack large sample sizes and active comparison groups. Common issues around clearly defining treatments including standardizing treatment components, dose, intensity, duration and training of providers make generalization across studies difficult. MBTs in cancer care show great promise and evidence of efficacy for treating many common symptoms. Future studies should investigate more diverse cancer populations using standardized treatment protocols and directly compare various MBTs to one another.

Protocol for the MATCH study (Mindfulness and Tai Chi for cancer health): A preference-based multi-site randomized comparative effectiveness trial (CET) of Mindfulness-Based Cancer Recovery (MBCR) vs. Tai Chi/Qigong (TCQ) for cancer survivors.

PURPOSE: A growing number of cancer survivors suffer high levels of distress, depression and stress, as well as sleep disturbance, pain and fatigue. Two different mind-body interventions helpful for treating these problems are Mindfulness-Based Cancer Recovery (MBCR) and Tai Chi/Qigong (TCQ). However, while both interventions show efficacy compared to usual care, they have never been evaluated in the same study or directly compared. This study will be the first to incorporate innovative design features including patient choice while evaluating two interventions to treat distressed cancer survivors. It will also allow for secondary analyses of which program best targets specific symptoms in particular groups of survivors, based on preferences and baseline characteristics. METHODS AND SIGNIFICANCE: The design is a preference-based multi-site randomized comparative effectiveness trial. Participants (N=600) with a preference for either MBCR or TCQ will receive their preferred intervention; while those without a preference will be randomized into either intervention. Further, within the preference and non-preference groups, participants will be randomized into immediate intervention or wait-list control. Total mood disturbance on the Profile of mood states (POMS) post-intervention is the primary outcome. Other measures taken pre- and post-intervention and at 6-month follow-up include quality of life, psychological functioning, cancer-related symptoms and physical functioning. Exploratory analyses investigate biomarkers (cortisol, cytokines, blood pressure/Heart Rate Variability, telomere length, gene expression), which may uncover potentially important effects on key biological regulatory and antineoplastic functions. Health economic measures will determine potential savings to the health system.

The association between insomnia symptoms and cardiovascular risk factors in patients who complete outpatient cardiac rehabilitation.

OBJECTIVE: The present study investigated whether completion of an exercise-based cardiac rehabilitation (CR) program was associated with improvements in both traditional cardiovascular risk factors and insomnia symptoms, and whether degree of improvement in insomnia symptom severity was associated with degree of improvement in cardiovascular risk. METHODS: Participants (N = 80) with cardiovascular disease completed a 12-week outpatient CR program involving supervised moderate-intensity exercise sessions held twice weekly. Insomnia symptom severity, blood pressure, body mass index, psychological distress, and lipid profile were measured at baseline and after completion of the program. RESULTS: Nearly 40% reported mild to moderate insomnia symptom severity at baseline. There were improvements in insomnia symptom severity, anxious and depressive symptoms, low-density lipoprotein levels, triglycerides, and total cholesterol from baseline to post-program. After statistical adjustment for age, sex, and functional capacity, greater improvement in insomnia symptom severity was associated with greater improvements in total cholesterol and symptoms of anxiety and depression. CONCLUSIONS: Completion of CR may contribute to improved sleep that, in turn, is associated with improvements on some indices of cardiovascular risk. Future research should examine the direction of the association between insomnia and cardiovascular risk, including whether efforts to alleviate insomnia may bolster the cardiovascular benefits of CR.

Protocol for a placebo-controlled, within-participants crossover trial evaluating the efficacy of intranasal oxytocin to improve pain and function among women with chronic pelvic musculoskeletal pain.

INTRODUCTION: This protocol presents the rationale and design for a trial evaluating the efficacy of intranasal oxytocin in improving pain and function among women with chronic pelvic musculoskeletal pain. Oxytocin is a neuropeptide traditionally recognised for involvement in labour, delivery and lactation. Novel evidence suggests that oxytocin decreases pain sensitivity in humans. While oxytocin administration has been reported to lower pain sensitivity among patients experiencing chronic back pain, headache, constipation and colon pain, no research has evaluated the association between intranasal oxytocin and chronic pelvic musculoskeletal pain. The association between oxytocin and pain may differ in women with chronic pelvic musculoskeletal pain relative to other chronic pain conditions because of the abundance of oxytocin receptors in the uterus. METHODS AND ANALYSIS: This is a prospective, randomised, placebo-controlled, double-blind, within-participants crossover trial. 50 women with chronic pelvic musculoskeletal pain will be recruited through a local chronic pain centre and gynaecology clinics. Women will complete baseline measures and be randomised to an experimental or control condition that involve 2 weeks of self-administering twice-daily doses of 24 IU intranasal oxytocin or placebo, respectively. Women will then undergo a 2-week washout period before crossing over to receive the condition that they had not yet received. The primary outcome will be pain and function measured using the Brief Pain Inventory-Short Form. Secondary outcomes include emotional function, sleep disturbance and global impression of change. This trial will provide data on the 14-day safety and side-effect profile of intranasal oxytocin self-administered as an adjuvant treatment for chronic pelvic musculoskeletal pain. ETHICS AND DISSEMINATION: This trial was granted approval from Health Canada and the University of Calgary Conjoint Health Research Ethics Board, and is registered online at ClinicalTrials.gov (#NCT02888574). Results will be disseminated to healthcare professionals through peer-reviewed publications and to the general public through press releases. TRIAL REGISTRATION NUMBER: NCT02888574; Pre-results.

Preconception health behaviours: A scoping review.

Preconception health refers to the health of males and females at any point in time prior to a potential pregnancy. A goal of preconception health research is to use preventive behaviour and healthcare to optimize the health of future offspring that result from both planned and unplanned pregnancies. This paper briefly reviews evidence of the importance of various preconception health behaviours, and examines the extent to which specific preconception health behaviours have been included in recent studies of such knowledge, behaviours, and intentions. To describe this recent research in highly developed countries, a scoping review of the literature was completed of studies published within the past seven years. A total of 94 studies on preconception health were identified and reviewed: (a) 15 examined knowledge and attitudes, (b) 68 studied behaviours, (c) 18 examined interventions designed to improve knowledge or behaviour, and (d) no studies examined intentions to engage in preconception health behaviours. Over 40% of studies examining preconception health behaviour focussed exclusively on folic acid. Overall, folic acid, alcohol, and cigarettes have consistently been topics of focus, while exposure to harmful environmental substances, stress, and sleep have been largely neglected. Despite strong evidence for the importance of men's health during the preconception period, only 11% of all studies included male participants. Based on existing gaps in the research, recommendations are provided, such as including men in future research, assessing a wider variety of behaviours, consideration of behavioural intentions, and consideration of the relationships between preconception health knowledge, intentions, and behaviour.