Plant-Based Diets versus the Mediterranean Dietary Pattern and Their Socio-Demographic Determinants in the Spanish Population: Influence on Health and Lifestyle Habits.

BACKGROUND: Plant-based diets are becoming more and more widespread among the Spanish population, progressively replacing the Mediterranean dietary pattern. Different studies have shown the motivations for adherence to these diets, and others have highlighted some health advantages and disadvantages. PURPOSE OF THE STUDY: Further studies are needed to define the socio-demographic determinants that influence the choice of a plant-based diet and to study the relationship that the choice of dietary pattern has on the health and lifestyle habits of the population. METHODS: A descriptive, cross-sectional study was conducted on the Spanish population. The NutSo-HH questionnaire, developed and validated by the research team, was used to gather socio-demographic, nutritional, social, and lifestyle information through non-probabilistic snowball sampling. RESULTS: The questionnaire was completed by 22,181 Spanish citizens, of whom only 19,211 were of interest to the study. The socio-demographic variables gender, age, educational level, income level, and place of residence do not seem to influence the prevalence of a plant-based diet (n = 1638) compared to a Mediterranean diet (n = 17,573). People following a vegetarian or vegan diet have a lower BMI, and they consume less fried food, fast food, and ultra-processed dishes and fewer energy drinks or sugary beverages. They also do more exercise and sleep longer hours, smoke less, and consume alcohol less frequently. However, there seem to be more diagnosed eating disorders among people who follow a plant-based diet than those who follow a Mediterranean diet. CONCLUSIONS: People who adopt a plant-based diet tend to exhibit healthier lifestyle patterns and consume fewer foods that are detrimental to their health. However, it is essential for such dietary choices to be supervised by healthcare professionals to mitigate the risk of maladaptive behaviors evolving into eating disorders.

A methodological framework for rigorous systematic reviews: Tailoring comprehensive analyses to clinicians and healthcare professionals.

Systematic reviews represent a fundamental study design, providing the highest level of evidence across diverse research inquiries, encompassing both public health and clinical research and practice. However, for healthcare professionals, the process of selecting, synthesizing, and interpreting evidence can be challenging, and requires specialized skills. Therefore, it is imperative to explore innovative solutions aimed at simplifying and making the traditional systematic review process more accessible while ensuring the validity and reliability of results. In this perspective, our research objective is to develop a systematic review framework that, while maintaining a rigorous methodological approach, streamlines the process for healthcare professionals. This study describes such approach in every phase, from the collection of evidence to the writing of the text, creating a guide for the healthcare professional who approaches this type of research. The qualitative and organizational analysis tools are also described, providing useful information for the use of non-paid programs. This systematic review aims to develop a framework with a rigorous methodological approach that allows simplify the process for clinicians and healthcare professionals. The implementation of this methodology in clinical practice offers new perspectives to ensure a thoughtful consideration and application of scientific evidence and opens the way to innovative and easily accessible solutions to facilitate the conduct of systematic reviews in the clinical care setting.

Protocol for conducting a systematic review on diagnostic accuracy in clinical research.

In the landscape of modern medicine, the ability to accurately diagnose various clinical conditions is paramount. As new diagnostic tools continue to emerge, their accuracy must be rigorously assessed before clinical implementation. This paper introduces a systematic review protocol tailored for diagnostic accuracy studies, drawing inspiration from a review on dysphagia screening in post-stroke patients. The protocol, designed with precision and transparency at its core, facilitates a thorough synthesis of evidence, employing tools such as the Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) and the Standards for Reporting of Diagnostic Accuracy Studies (STARD) checklist for robust evaluation. The protocol emphasizes registration with the PROSPERO database and adherence to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The systematic search approach encompasses a comprehensive exploration of databases and precise keyword combinations. Distinctive inclusion and exclusion criteria, coupled with a dual-reviewer methodology, ensure the selection of high-quality studies. This framework has the potential to serve as a benchmark for systematic reviews in diagnostic accuracy, highlighting the importance of standardization, transparency, and adaptability in clinical research. This approach paves the way for a research methodology that delves deeper into diagnostic tools across various clinical scenarios, promoting evidence-based advancements in patient care.

Nurses' experiences of caring for nursing care-dependent ICU patients: A qualitative study.

BACKGROUND: Nursing care dependency is a key, yet under-studied, nursing phenomenon. Patients in intensive care units are highly dependent on nursing care. Patients find dependency challenging, experiencing feelings of powerlessness and shame. The nurse-patient care relationship can influence patients' perception of dependency. Understanding how nurses experience their care for dependent patients is crucial, as nurses might not always grasp the impact of their actions on patients' dependency experiences. AIM: To explore and interpret ICU nurses' perceptions of patients' nursing care dependency and their experiences in caring for nursing care-dependent patients. METHODS: A qualitative interpretative phenomenological study inspired by Merleau-Ponty's philosophical stance was conducted using focus groups with nurses who had been caring for adult patients for at least 6 months in ICUs of two hospitals. Data analysis followed Smith et al.'s guidance. Researchers immersed themselves in the transcripts, noted individual's experiences before transitioning to shared insights, coded significant phrases and generated themes and superordinate themes. RESULTS: Four focus groups were conducted with 18 nurses with widely ranging ages and work experience. Four superordinate themes emerged: 'Time and context define dependency', 'Empathetic relationships help nurses understand patients' experience of dependency', 'Trusting nurse-patient relationships change the dependency experience' and 'Nurses' skills help patients to recover independence'. CONCLUSION: This study increases critical care nurses' awareness of the overlooked phenomenon of caring for nursing care dependent patients and offers them an opportunity to reflect on their care for dependent patients and adapt it to patients' experiences. Further studies are needed with nurses and patients in different ICUs, cultures and countries, to gain a broader picture of experiences of nursing care dependency. RELEVANCE TO CLINICAL PRACTICE: ICU nurses need strong relational skills to offer high-quality care for dependent patients, facilitating meaningful nurse-patient relationships based on empathy and trust. These relationships can significantly impact the patient's experience of dependence.

Psychometric testing of the Care Dependency Scale in patients with heart failure and their caregivers.

AIMS: This study aims to (i) test the validity and reliability of the Care Dependency Scale (CDS) for patients with heart failure (HF) and (ii) test the validity and reliability of the proxy version of the CDS assessing informal caregivers' perception of the dependency level of individuals with HF. METHODS AND RESULTS: Secondary data analysis was conducted of transnational multicentre cross-sectional design study. A convenience sample comprised of HF patients-informal caregivers' dyads in three European countries. The CDS was administered to patients and the proxy version to informal caregivers. Factorial validity was tested for each scale using confirmatory factor analysis. Reliability was evaluated with the composite coefficient and Cronbach's alpha. Construct validity was tested via known group differences. Measurement error was tested to assess responsiveness to changes. A total of 229 patients and 208 caregivers were recruited. Confirmatory factor analysis supported the two-factor structure (Physical Care Dependency and Psychosocial Care Dependency) of the CDS in both HF patients and their caregiver. Reliability estimates were adequate for all reliability coefficients. Construct validity was supported. The measurement error was adequate. CONCLUSION: The scale shows acceptable validity and reliability and can be useful for care dependency assessment of patients with HF and their informal caregivers. Further research is needed for assessing the validity and reliability in other cross-cultural settings. The use of the CDS has the potential to effectively enable the development of pertinent care plans, taking dependency into consideration including the perspective of both members of the dyad as a whole.

Nursing-engineering interdisciplinary research: A synthesis of methodological approach to perform healthcare-technology integrated projects.

In the dynamic landscape of contemporary healthcare, the imperative for advancing the frontiers of knowledge and improving patient outcomes necessitates a paradigm shift towards a multidisciplinary approach. This background great enhances a nurse's ability to interface with technology and create technical solutions such as robots, patient care devices, or computer simulation for patient care needs and nursing care delivery. This study aims to describe, through a narrative review of evidence, a methodology to develop and manager Nursing-Engineering interdisciplinary project, clarify the key points and facilitate professionals who are not very familiar with this topic. The methodology employed highlights the importance of this kind of research that allows to achieve highest standards of practice leading to improved patient care, innovative solutions and a global contribution to healthcare excellence.

Systematic review of clinical practice guidelines and systematic reviews: A method for conducting comprehensive analysis.

A systematic review (SR) is a research method for synthesizing evidence on a specific topic. Among the various types of systematic reviews, there are SRs of guidelines (CPGs) and SRs of SRs. Traditionally, they are limited to just one type of secondary evidence. This paper introduces an innovative SR methodology that combines CPGs and SRs to improve evidence synthesis and overcome the limitations of isolated use. Essential steps that should always precede the actual research process include registering the research protocol, formulating research questions and setting inclusion/exclusion criteria. Using the PRISMA protocol for comprehensive database searches, it's crucial to combine keywords with boolean operators and remove duplicates. The eligibility of studies should be assessed by selecting potentially relevant articles through an initial screening of titles and abstracts, followed by a meticulous analysis of the full-texts. Rigorous evidence evaluation tools, such as AGREE II for CPGs and AMSTAR 2 for SRs, and the double reviewer approach ensure high-quality selections. Additionally, converting summarized results into percentages and applying statistical analyses facilitate interpretation and improve the reliability of rater assessments. A further characteristic of this methodology is its adaptability to the evolution of healthcare research.

Dysphagia screening post-stroke: systematic review.

BACKGROUND/SCOPE: Stroke is one of the main causes of death, especially when associated with dysphagia. Hence, the assessment of nutritional status and aspiration risk is important to improve clinical outcomes. The aim of this systematic review is to identify which are the most suitable dysphagia screening tools in chronic post-stroke patients. METHODOLOGY: A systematic literature search was conducted for articles published from 1 January 2000 to 30 November 2022 in the Cochrane Library, PubMed, Embase, CINAHL, Scopus and Web of Science databases, including primary studies providing quantitative or qualitative data. Additionally, a manual search was conducted scanning the reference lists of relevant articles and Google Scholar was searched to retrieve additional records. The process of screening, selection and inclusion of the articles, as well as the assessment of risk of bias and methodological quality, were conducted by two reviewers. RESULTS: Out of the 3672 records identified, we included 10 studies, mostly (n=9) cross-sectional, evaluating screening for dysphagia in 1653 chronic post-stroke patients. Volume-Viscosity Swallow Test was the only test applied in multiple studies with adequate sample size, demonstrating high diagnostic accuracy (sensitivity=96.6%-88.2%; specificity=83.3%-71.4%) compared with the videofluoroscopic swallowing study. CONCLUSIONS: Dysphagia is an important complication in chronic post-stroke patients. Early identification of this condition through screening tools with adequate diagnostic accuracy is of paramount importance. The limited number of studies available and their small sample sizes may be a limitation to this study. PROSPERO REGISTRATION NUMBER: CRD42022372303.

Nurses experience with body care among palliative care patients: a phenomenological study.

BACKGROUND: Palliative care is defined as active and global care that provides holistic care integrating the body, mind and spirit of the dying person. A person's health deteriorates at the end of life and nurses facilitate patients to manage their personal body care. Knowing and considering the impact of disease on individuals' lives, how they adapt to cope with it, and the meaning they give to it, can help nurses. This is because of the embodiment concept of living in and through our bodies. The aim of the study is to explore palliative care patients' experiences with nurses during body care. METHODS: A descriptive phenomenological approach based on Husserl's philosophical perspective was used. A purposive sample of eight palliative care patients were enrolled in the study. Semi-structured interviews were conducted between November 2018 and January 2019, in an Italian hospice. The interviews were about patients' feelings during nursing body care. The transcripts were analysed using Giorgi's phenomenological method. Several strategies were used to ensure the study's reliability. RESULTS: The qualitative analysis revealed six categories that converged in three themes: 1) body care requires a specific competence; 2) patients experience difficulties during care by nurses; 3) compassionate care relationships help patients to find wellbeing and balance. CONCLUSIONS: People at the end of life find the deterioration of their body distressing and a reminder that they are about to die. These considerations give us an understanding of patient embodiment and the significance of a patient's lived experiences at the end of their life. This phenomenon in nursing should be explored further in future research, to help inform more targeted care strategies.

Virtual Reality During Chemotherapy Infusion: An Innovative Intervention in Holistic Nursing Practice.

Patients with cancer receiving infusional chemotherapy show negative symptoms such as worry about their survival, anxiety, anguish, depression, fear, magnified perception of the passage of time, and difficulty managing boredom. Patients also suffer various side effects produced by chemotherapy such as nausea, vomiting, pain, and fatigue, which, together with psychological distress, drastically reduce their quality of life and adherence to therapy with a corresponding reduction in the probability of the individual's survival. Virtual Reality is one of the most innovative and promising digital health interventions, capable of quickly and effectively producing a positive influence on the psychosomatic axis, improving patients' quality of life during chemotherapy. Virtual Reality, through its 3-dimensional multisensory technology, isolates sensory channels from the negative external environment and enables an experience of being physically and psychologically present within virtual scenarios, in which patients can perceive sensations, emotions, cognitions, and interactions as if they really were in different surroundings. This article systematically expounds the scientific conditions necessary for effective, appropriate, and safe implementation of Virtual Reality interventions in holistic nursing practice, describing the underpinning conceptual framework, the types, technological characteristics, methods of use, duration, type of virtual content, and implementation procedure of Virtual Reality.

Work-related stress, job satisfaction, and quality of work life among cardiovascular nurses in Italy: Structural equation modeling.

AIM: To investigate the simultaneous effects of work-related stress and job satisfaction on cardiovascular nurses' quality of work life. BACKGROUND: Prior research has investigated nurses' work-related stress, job satisfaction, and quality of work life as separate aspects and not in specific nursing settings, such as cardiovascular wards. Cardiovascular care settings can be particularly stressful for nurses, who are often faced with distress, depression and patients and caregivers' physical and psychological exhaustion. METHODS: A multicenter cross-sectional study was conducted among 1126 cardiovascular nurses from 10 hospitals in Italy. Work-related stress, job satisfaction, and quality of work life were measured using valid and reliable questionnaires. Structural equation modeling was performed. RESULTS: Nurses working in critical cardiac care units experienced more stress than their colleagues working in other cardiac units. Nurses working in cardiac outpatient clinics reported lower quality of work life than those working in other cardiac settings. There was a negative relationship between work-related stress and nurses' quality of work life, which was partially mediated by job satisfaction, indicating that stress generated by the work environment negatively affect nurses' quality of work life by reducing their job satisfaction. CONCLUSION: Cardiovascular nurses' quality of work life is negatively affected by work-related stress. The work-related stress is mediated through job satisfaction. Nurse managers should maximize nurses' job satisfaction by providing comfort at work, supporting professional development opportunities, sharing organizational objectives, and actively listening and addressing nurses' concerns. When cardiovascular nurses' quality of work life is elevated, patients' care quality and outcomes are improved.

Effectiveness of Immersive Virtual Reality in People with Cancer Undergoing Antiblastic Therapy: A Randomized Controlled Trial.

OBJECTIVES: This study aims to assess the effects of immersive Virtual Reality in people with cancer undergoing antiblastic therapy, on anxiety, fatigue and pain. DATA SOURCES: This is a randomized controlled three-arm trial. Seventy-four cancer patients were recruited from a regional hospital in Italy, and randomly allocated into three groups: a Virtual Reality group (n=25), a narrative medicine group (n=25) and a standard care group (n=24). The primary outcome was anxiety. Secondary outcomes included fatigue and pain. The outcomes were evaluated immediately before and after the interventions. The findings showed that anxiety decreased more in the Virtual Reality group (Δpre-post = 6.24, 95% CI 2.578 to 9.902, p=.001, d = 0.63) than in the narrative medicine group, whereas it did not change for those in the standard care group. Fatigue decreased in the Virtual Reality group (Δpre-post = 0.576, 95% CI 0.246 to 0.907, p=.001, d = 0.23), while remaining stable in the narrative medicine group, and increasing in the standard care group. Average levels of pain did not change before and after the intervention [F(1,71) = 1.06, p=.307, ηp2 = .015]. CONCLUSION: Findings show that virtual reality is effective to reduce anxiety and fatigue in people with cancer undergoing antiblastic therapy. IMPLICATIONS FOR NURSING PRACTICE: Virtual Reality can be recommended as an complementary intervention to manage anxiety and fatigue in people with cancer during antiblastic therapy. TRIAL REGISTRATION: ClinicalTrials.gov NCT05629507.

Effectiveness of immersive virtual reality on anxiety, fatigue and pain in patients with cancer undergoing chemotherapy: A systematic review and meta-analysis.

PURPOSE: This Systematic review and meta-analysis aimed to assess the effectiveness of Virtual Reality on anxiety, fatigue and pain in patients with cancer during chemotherapy and provide evidence for decision-making in clinical practice. METHODS: A systematic literature search was performed in the databases PubMed, Web of Science, Scopus, Cumulative Index of Nursing and Allied Health Literature and the Cochrane Library. Risk of Bias was used to assess the quality of individual studies, and Grading of Recommendations Assessment, Development and Evaluation was used to assess confidence for each individual outcome. A random-effects model was used to examine the overall effect. RESULTS: Four randomized controlled trials and four crossover studies were included, with an overall sample of 459 patients. Results showed that Virtual Reality compared with standard care had a significant reduction of anxiety only (MD = -6.57, 95% CI: -11.59 to -1.54, p = 0.01) but with considerable heterogeneity (I2 = 92%), while Virtual Reality was not significantly different from integrative interventions. The trials included showed small sample sizes, lack of statistical power, low methodological quality, high heterogeneity, and different Virtual Reality technology types, lengths and frequencies. CONCLUSION: The quality of evidence is very low and the strength of recommendation is weak. Further research has large potential for reducing uncertainty about the effects of Virtual Reality in patients with cancer receiving chemotherapy. This study was registered with PROSPERO as CRD42020223375.

Use of Motivational Interviewing in Older Patients with Multiple Chronic Conditions and Their Informal Caregivers: A Scoping Review.

The use of motivational interviewing is relatively new in multiple chronic conditions (MCCs). A scoping review was conducted according to JBI methodology to identify, map and synthesize existing evidence on the use of motivational interviewing to support self-care behavior changes in older patients with MCCs and to support their informal caregivers in promoting patient self-care changes. Seven databases were searched, from database inception to July 2022, for studies that used motivational interviewing in interventions for older patients with MCCs and their informal caregivers. We identified 12 studies, reported in 15 articles, using qualitative, quantitative, or mixed-method designs, conducted between 2012 and 2022, describing the use of motivational interviewing for patients with MCCs. We could not locate any study regarding its application for informal caregivers. The scoping review showed that the use of motivational interviewing is still limited in MCCs. It was used mainly to improve patient medication adherence. The studies provided scant information about how the method was applied. Future studies should provide more information about the application of motivational interviewing and should address self-care behavior changes relevant to patients and healthcare providers. Informal caregivers should also be targeted in motivational interviewing interventions, as they are essential for the care of older patients with MCCs.

Psychosocial Impact of Virtual Cancer Care through Technology: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

This meta-analysis of RCTs aimed to determine whether replacing face-to-face hospital care with telemedicine deteriorates psychosocial outcomes of adult cancer patients, in terms of quality of life (QoL), anxiety, distress, and depression. RCTs on interventions aimed at improving patient psychosocial outcomes were excluded. MEDLINE, EmBASE, and PsycInfo were searched on 13 May 2022 without language or date restrictions. In total, 1400 records were identified and 8 RCTs included (4434 subjects). Study methodological quality was moderate. Statistically significant improvements were observed in favor of the intervention for QoL (SMD = 0.22, 95% CI 0.01 to 0.43, p = 0.04), anxiety (SMD = -0.17, 95% CI -0.30 to -0.04, p < 0.01), and global distress (SMD = -0.38, 95% CI -0.51 to -0.25, p < 0.01). A meta-analysis on depression could not be performed. In subgroup analyses, the intervention appeared to be more beneficial for patients receiving active treatment vs. follow-up, for "other cancer types" vs. breast cancer, and for "other modes of administration" vs. telephone. Given the many potential advantages of being assisted at home, telemedicine appears to be a viable option in oncology. However, more research is necessary to determine the types of patients who may benefit the most from these alternative care modalities.

Nutritional knowledge of nursing students: A systematic literature review.

OBJECTIVE: To investigate basic, specific and self-care knowledge on nutrition in nursing students, through a literature review and by identifying studies that suggest teaching methodologies used to implement undergraduate nutrition teaching in nursing curricula. METHOD: A systematic literature search was conducted in the PubMed, Embase, CINAHL, Scopus and Cochrane Library. The process of screening, selection and inclusion of the articles, as well as the assessment of risk of bias and methodological quality was independently conducted by two reviewers. Out of 1361 records identified, 23 were included in this review. RESULTS: Nursing students showed poor knowledge of basic and specific nutrition demonstrating a lack of knowledge also about nutritional self-care. The implementation of alternative teaching methods, such as active teaching strategies improved the students' knowledge of the subject. CONCLUSION: The use of nutrition-focused, especially active, teaching methodologies during undergraduate nursing education can remedy the lack of knowledge on this topic. This approach should also be used in postgraduate education.

Can Smart Home Technologies Help Older Adults Manage Their Chronic Condition? A Systematic Literature Review.

The management of chronic diseases requires personalized healthcare that allows older adults to manage their diseases at home. This systematic review aimed to describe the smart home technologies used in the management of chronic diseases in older people. A systematic literature review was conducted on four databases and was reported following the PRISMA statement. Nineteen articles were included. The intervention technologies were classified into three groups: smart home, characterized by environmental sensors detecting motion, contact, light, temperature, and humidity; external memory aids, characterized by a partnership between mobile apps and smart home-based activity learning; and hybrid technology, with the integration of multiple technologies, such as devices installed at patients' homes and telemedicine. The health outcomes evaluated are vital signs, medication management, ADL-IADL, mobility, falls, and quality of life. Smart homes show great potential in the management of chronic diseases by favouring the control of exacerbations and increasing patients' safety by providing support in disease management, including support for cognitively impaired older people. The use of smart homes in the community could bring numerous benefits in terms of continuity of care, allowing the constant monitoring of older people by local and hospital health services.

Specialized Nurse-led Care of Chronic Wounds During Hospitalization and After Discharge: A Randomized Controlled Trial.

OBJECTIVE: To evaluate the effectiveness of specialized nurse-led care of patients with chronic wounds, provided both during hospitalization and postdischarge, on wound healing and readmission rates. METHODS: An unblinded randomized controlled trial was conducted. Participants were patients with chronic wounds, randomly assigned to either the experimental group (cared for by wound care nurses both during hospitalization and postdischarge) or to the control group (cared for according to standard practice). Wound healing was identified as the primary outcome. RESULTS: Overall, 1,570 patients were randomized, 1,298 of whom were included in the per-protocol analysis (707 in the experimental group and 591 in the control group). Nurse-led wound care quadrupled the probability of healing and reduced the number of treatment weeks and hospital readmissions. CONCLUSIONS: Chronic wound care that was entrusted to specialized nurses improved outcomes in terms of wound healing, repair and regeneration, length of treatment, and rate of readmission, compared with standard practice. Future studies should evaluate the impact of care provided by specialized wound care nurses on patients' quality of life and healthcare costs. Nurse managers should promote the implementation of chronic wound clinical-care pathways entrusted to specialized nurses to improve patients' clinical outcomes and reduce hospital readmissions.

Disease-related knowledge in people with chronic obstructive pulmonary disease and their informal caregivers: A multilevel modelling analysis.

AIMS AND OBJECTIVES: To assess the level of chronic obstructive pulmonary disease (COPD)-related knowledge within patient and informal caregiver dyads, and to identify factors influencing the knowledge level considering the interdependence within the dyads. BACKGROUND: Patients with COPD and their informal caregivers present poor disease knowledge and different characteristics are associated with their level of knowledge. Disease knowledge and related characteristics have been assessed separately in patients and informal caregivers, without considering possible influence within the dyads. DESIGN: Cross-sectional study. METHODS: A convenience sample of dyads was recruited in outpatient and inpatient settings in Central and South Italy. The Bristol COPD Knowledge Questionnaire was used to measure disease knowledge. Sociodemographic, clinical and caregiving characteristics, self-efficacy and depression were measured in patients and caregivers. Multilevel modelling was used to analyse COPD knowledge at the level of the dyad to control for interdependency between patients and informal caregivers. The STROBE guidelines for cross-sectional studies were followed for study reporting. RESULTS: We recruited 133 dyads. The total level of correct knowledge shared by dyads was 32.89%. Dyads presented higher levels of correct knowledge about disease symptoms, smoking cessation and vaccination, and lower about COPD treatment. Younger patients with greater self-efficacy, who attended pulmonary rehabilitation and were cared for by a spouse/partner with low levels of depression, and informal caregivers who were patients' spouse/partner were more likely to have higher levels of disease-related knowledge. CONCLUSIONS: Our study advances dyadic research in COPD. Future studies should investigate the effects of shared knowledge and incongruent knowledge (where one member knows more than the other) on patient self-care and caregiver contribution to patient self-care. RELEVANCE TO CLINICAL PRACTICE: Our study shows what knowledge nurses should provide in educational programmes directed at patients and caregivers, and which dyads have greater knowledge deficits, to whom offer targeted educational interventions.