Depression is defined as a cluster of specific symptoms with associated impairment affecting 7.4% of the adolescents globally. As part of the systematic review, around 1000 relevant articles published between January 1978 and December 2017 were identified by systematic online search from 6 electronic databases (PubMed, PsycInfo, Science Direct, MEDLINE, Scopus, and Google Scholar) and overall, 56 relevant studies were included in the current review as per the inclusion criteria. Findings highlight the potential importance of the relationship between healthy dietary patterns or quality and positive mental health throughout life span. Various nutrition and dietary compounds have been suggested to be involved in the onset maintenance and severity of depressive symptoms and disorders. Nutritional compounds might modulate depression associated biomarkers. In this context, several healthy foods such as olive oil, fish, nuts, legumes, dairy products, fruits, and vegetables have been inversely associated with the risk of depression and might also improve symptoms. In contrast western dietary patterns including the consumption of sweetened beverages, fried foods, processed meats, baked products have been shown to be associated with an increased risk of depression in longitudinal studies. Diet and nutrition offer key modifiable targets for the prevention of mental disorders. Evidence is steadily growing for the relation between nutrition deficiencies, diet quality and mental health and for the efficacy and use of nutritional supplements to address deficiencies or as augmentation therapies. We advocate recognition of diet and nutrition as crucial factors in prevention and management of mental disorders.
Nature-based social prescribing such as “blue prescription” promotes public health and health improvement of individuals with long-term health conditions. However, there is limited evidence explaining the relationship of contexts, mechanisms, and outcomes of implementing blue prescription programmes (BPPs) in health and social care settings that could inform policy and practice. We conducted a systematic realist review by searching PubMed, Web of Science, PsycInfo, Scopus, MEDLINE, and CINAHL for articles published in English between January 2000 and June 2022 about health and social care professionals providing referral to or prescription of blue space activities (e.g., swimming, fishing, surfing, etc.) with health-related outcomes. Components and descriptions of BPP implementation were extracted and used to develop themes of contextual factors used to develop programme theories and a logic model demonstrating the mechanisms of BPP implementation. Sixteen studies with adequate to strong quality were included from 8,619 records. After participating in BPPs referred to or prescribed by health and social care professionals, service users had improvements in their physical, cognitive (mental), social health, and proenvironmental knowledge. Service user-related contextual factors were referral information, free equipment, transportation, social support, blue space environments, and skills of service providers. Programme-related contextual factors were communication, multistakeholder collaboration, financing, and adequate service providers. Programme theories on service user enrolment, engagement, adherence, communication protocols, and programme sustainability explain the mechanisms of BPP implementation. BPPs could promote health and wellbeing if contextual factors and programme theories associated with service users’ characteristics and programme delivery are considered in the design, delivery, and evaluation of BPPs. Our study was registered with PROSPERO (CRD42020170660).
Background: Nature-based social prescribing programmes such as "bluespace prescription" may promote public health and health improvement of individuals with long-term conditions. However, there is limited systematically synthesised evidence that investigates the contexts and mechanisms of Bluespace Prescription Programmes (BPPs) that could inform programme theories for policy and practice. Methods: We conducted a realist review by searching six databases for articles published between January 2000 and February 2020, in English, about health and social care professionals providing referral to or prescription of blue space activities with health-related outcomes. We developed themes of contextual factors by analysing the contexts of BPPs. We used these contextual factors to develop programme theories describing the mechanisms of BPP implementation. Our study was registered with PROSPERO (CRD42020170660). Results: Fifteen studies with adequate to strong quality were included from 6,736 records. Service users had improvements on their physical, mental, social health, and environmental knowledge after participating in BPPs referred to or prescribed by health and social care professionals. Patient-related contextual factors were referral information, free equipment and transportation, social support, blue space environments, and skills of service providers. Intervention-related contextual factors were communication, multi-stakeholder collaboration, financing, and adequate service providers. Programme theories on patient enrolment, engagement, adherence, communication protocols, and long-term programme sustainability described the mechanisms of BPP implementation. Conclusion: BPPs could support health and social care services if contextual factors influencing patients and intervention delivery are considered for implementation. Our findings have implications in planning, development, and implementation of similar nature-based social prescribing programmes in health and social care settings. Keywords: sustainable healthcare, social prescribing, blue spaces, bluespace prescriptions
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