Professionals' perspectives on interventions to reduce problematic alcohol use in older adults: a realist evaluation of working elements.

OBJECTIVES: This study set out to understand how (which elements), in what context and why (which mechanisms) interventions are successful in reducing (problematic) alcohol use among older adults, from the perspective of professionals providing these interventions. DESIGN: Guided by a realist evaluation approach, an existing initial programme theory (IPT) on working elements in alcohol interventions was evaluated by conducting semistructured interviews with professionals. SETTING AND PARTICIPANTS: These professionals (N=20) provide interventions across several contexts: with or without practitioner involvement; in-person or not and in an individual or group setting. Data were coded and links between contexts, elements, mechanisms and outcomes were sought for to confirm, refute or refine the IPT. RESULTS: From the perspective of professionals, there are several general working elements in interventions for older adults: (1) pointing out risks and consequences of drinking behaviour; (2) paying attention to abstinence; (3) promoting contact with peers; (4) providing personalised content and (5) providing support. We also found context-specific working elements: (1) providing personalised conversations and motivational interviewing with practitioners; (2) ensuring safety, trust and a sense of connection and a location nearby home or a location that people are familiar with in person and (3) sharing experiences and tips in group interventions. Furthermore, the mechanisms awareness and accessible and low threshold participation were important contributors to positive intervention outcomes. CONCLUSION: In addition to the IPT, our findings emphasise the need for social contact and support, personalised content, and strong relationships (both between client and practitioner, and client and peers) in interventions for older adults.

What do we not know (yet) about recovery colleges? A study protocol on their (cost-)effectiveness, mechanisms of action, fidelity and positioning.

BACKGROUND: Recovery Colleges (RCs) have spread across the globe as a new way of supporting people with mental vulnerabilities in their recovery journey. RCs focus on 'learning' rather than 'curing' and in that line facilitate a transition from being a passive, dependent patient/client to an active, empowered student learning to live life, despite vulnerabilities. Peer support and co-creation are central in RCs, as peers learn from each other by sharing personal experiences with mental vulnerabilities in an accessible, inspiring and stimulating atmosphere. The implementation of RCs is highly encouraged internationally, and as a result RCs and related self-help initiatives increasingly emerge. However, high-quality research on RCs is scarce and there is a call for thorough investigation of (cost-)effectiveness, mechanisms of action, cross-border fidelity and positioning of RCs. In response, this research project aims to fill these gaps. METHODS: This research project entails (1) a prospective quasi-experimental effectiveness study and economic evaluation, (2) a multifaceted qualitative study to elaborate on the mechanisms of action of RCs for those involved (3) a study to develop a (Dutch) Fidelity Measure of Recovery Colleges, and (4) an organisational case study to describe the positioning of RCs in relation to other mental health care services and community-based initiatives. Following the ideals of co-creation and empowerment in RCs we conduct this research project in co-creation with RC students from Enik Recovery College in Utrecht, the Netherlands. DISCUSSION: This research project will lead to one of the first longitudinal controlled quantitative evaluations of both cost-effectiveness and effectiveness of RC attendance in a broad sense (beyond attending courses alone). Moreover, we will gather data on a micro level (i.e., impact on RC students), meso level (i.e., organisational fidelity) and macro level (i.e., positioning in the care and support domain), capturing all important perspectives when scrutinizing the impact of complex systems. Finally, we will demonstrate the validity and value of embracing experiential knowledge in science as a complementary source of information, leading to a more profound understanding of what is researched. TRIAL REGISTRATION: The prospective quasi-experimental study has been pre-registered at clinicaltrails.gov (#NCT05620212).

Towards a New Definition of the Typical Day in the Alcohol Use Disorder Identification Test-Consumption.

INTRODUCTION: The standard screening instrument for alcohol problems in the current primary care, the Alcohol Use Disorder Identification Test-Consumption (AUDIT-C), contains a question about alcohol consumption "on a typical day." Since this is a term that leaves room for multiple interpretations and the differences between alcohol consumption on weekends and weekdays are not taken into account, this study examines whether the latter distinction improves the prediction validity of the screening instrument. METHODS: A subgroup of 852 participants of the Dutch version of Dry January ("NoThanks") 2022 got the annual "NoThanks" survey, including questions about their alcohol consumption on weekends and weekdays, and the original ten AUDIT questions. The full AUDIT was used as golden standard. Sensitivity, specificity, and receiver operating characteristic curves were calculated for the original and different versions of the AUDIT-C. RESULTS: Of all participants, 67 percent were hazardous drinkers (AUDIT ≥8) and 27 percent were harmful drinkers (AUDIT ≥16). For the original AUDIT-C, the cut-off score with the most balanced combination of sensitivity and specificity for hazardous drinking in men was 7 and in women was 6. For harmful drinking, this was 8 and 7, respectively. Certain versions performed equally well as the original. For harmful drinkers, the highest area under the receiver operating characteristic curve (AUROC) was 0.814 and 0.866 for the original AUDIT-C, for men and women, respectively. Only for hazardous drinking men, the AUDIT-C with weekend day (AUROC = 0.887) performed slightly better than the original. CONCLUSION: Distinguishing weekend- and weekday alcohol consumption in the AUDIT-C does not lead to better predictions of problematic alcohol use. However, the distinction between weekends and weekdays provides more detailed information for healthcare professionals and can be used without having to compromise too much on validity.

Factors associated with problematic substance use before and during the COVID-19 pandemic among a drug addiction recovery cohort: A prospective study in the Netherlands, Belgium, and UK.

BACKGROUND: The COVID-19 pandemic and measures have placed various burdens on societies and individuals. Emerging evidence suggests that people in drug addiction recovery were negatively affected. This study investigates whether risk and protective factors associated with return to problematic substance use differed between the periods before and during the pandemic for those in recovery. METHODS: A convenience sample of persons in drug addiction recovery for at least three months completed an assessment at baseline before the pandemic (T0, N = 367) and at two consecutive follow-ups 12 months apart (T1, N = 311; T2, N = 246). The final follow-up took place during the pandemic (2020-2021). We analyzed rates and predictors of problematic substance use in both periods, and whether relations between predictors and problematic use differed between the periods. RESULTS: Rates of problematic use did not differ significantly before and during the pandemic for those who were followed-up. However, the relationship between problematic use and commitment to sobriety differed between both periods (OR = 3.24, P = 0.010), as higher commitment was only associated with lower odds of problematic use during (OR = 0.27, P < 0.001), but not before, the pandemic (OR = 0.93, P = 0.762). In both periods, persons who were engaged in psychosocial support had lower odds of problematic use. CONCLUSIONS: The COVID-19 pandemic was not followed by significant return to problematic substance use in a cohort of people who were already in drug addiction recovery for some time before the pandemic. However, with restricted access to environmental resources, they may have been more dependent on internal motivations. Targeting personal recovery resources with interventions could therefore reduce the chances of return to problematic substance use during a pandemic.

Workplace Mental Health Disclosure, Sustainable Employability and Well-Being at Work: A Cross-Sectional Study Among Military Personnel with Mental Illness.

Purpose Disclosure of mental illness to a supervisor can have positive (e.g. supervisor support) and negative consequences (e.g. stigma). However, research on the association between disclosure and sustainable employability and well-being at work is scarce. The aim of this study was to investigate the association between the disclosure decision (yes/no), experiences with the decision (positive/negative) and sustainable employment and well-being at work among military personnel with mental illness (N = 323). Methods A cross-sectional questionnaire study was conducted. Descriptive and regression (linear and ordinal) analyses were performed. Comparisons were made between those with positive and negative disclosure experiences. Results Disclosure decision (yes/no) was not significantly associated with any of the measures of sustainable employability and well-being at work. However, positive disclosure experiences were significantly associated with higher scores on almost all measures of sustainable employability and well-being at work. Those with negative disclosure experiences reported significantly more shame (Mpos = 2.42, Mneg = 2.78, p < .05) and discrimination (Mpos = 1.70, Mneg = 2.84, p < .001). Those with a positive disclosure experience, reported significantly more supervisor support (Mpos = 3.20, Mneg = 1.94, p < .001). Conclusion We did not find evidence that the disclosure decision itself is related to measures of sustainable employment and well-being at work. In contrast, how participants had experienced their (non-)disclosure decision was significantly related to almost all measures. This emphasizes the importance of the work environments reactions to disclosure and mental illness in the workplace. Future research and interventions should focus on increasing the likelihood of positive disclosure experiences through creating a more inclusive work environment, with more supervisor support and less stigma.

Dutch experiences in new partnerships between science and practice in health promotion: toward a fourth-generation university.

For a long time already, attempts have been made to bridge the gap between research and practice. In this respect, society demands that universities should have a bigger social impact. University and society/societal organizations should work together (co-create) during the entire research process, from the articulation of the research question until the implementation of the results. There is controversy about the question whether it is possible for universities to work together with practice and at the same time to retain the academic quality standards. First, this article deals with the question what characteristics are important for universities in order to be able to work together with practice. In this respect, the Dutch scientist Steinbuch came up with a tantalizing idea arguing that universities may take a next step and develop into 'fourth generation universities'. Second, it is described how a process of co-creation between university and the health promotion practice has been developed, bottom up, at Tranzo, Scientific Center for Care and Wellbeing, Tilburg University, the Netherlands. The ideas developed by Steinbuch and the results of the bottom up processes in Tilburg are combined. Consequences of the Tilburg experiences for the characteristics of a fourth-generation university are discussed as well as consequences for the role of universities in society.

Evaluating the perceived added value of a threefold intervention to improve palliative care for persons experiencing homelessness: a mixed-method study among social service and palliative care professionals.

BACKGROUND: Palliative care for persons experiencing homelessness who reside in social service facilities is often late or lacking. A threefold intervention was implemented to improve palliative care for this population by increasing knowledge and collaboration between social service and palliative care professionals. This consultation service comprised: 1) consultations between social service professionals and palliative care professionals; 2) multidisciplinary meetings involving these professionals; and 3) training of these professionals. This study aims to evaluate the perceived added value of this threefold consultation service in three regions in the Netherlands. METHODS: A mixed-methods evaluation study using structured questionnaires for consultants, requesting consultants, and attendees of multidisciplinary meetings, semi-structured group and individual interviews with social service and palliative care professionals involved, weekly diaries filled out by consultants, and an implementation diary. Qualitative data were analyzed following the principles of thematic analysis. Quantitative data were analyzed descriptively. RESULTS: Thirty-four consultations, 22 multidisciplinary meetings and 9 training sessions were studied during the implementation period of 21 months. Social service professionals made up the majority of all professionals reached by the intervention. In all regions the intervention was perceived to have added value for collaboration and networks of social service and palliative care professionals (connecting disciplines reciprocally and strengthening collaborations), the competences of especially social service professionals involved (competency in palliative care provision, feeling emotionally supported in complex situations), and the quality and timing of palliative care (more focus on quality of life and dying, advance care planning and looking ahead, and greater awareness of death and palliative care). CONCLUSIONS: The threefold consultation service particularly helps social service professionals connect with palliative care professionals. It helps them to identify palliative care needs in good time and to provide qualitatively better palliative care to persons experiencing homelessness.

Understanding How and Why Alcohol Interventions Prevent and Reduce Problematic Alcohol Consumption among Older Adults: A Systematic Review.

Problematic alcohol use has been increasing in older adults (55+) in recent decades. Many of the effective interventions that are available to prevent or reduce the negative effects of alcohol consumption are aimed at adults in general. It is unclear whether these interventions also work for older adults. The objective of this review was to understand how (i.e., which elements), in which context, and why (which mechanisms) interventions are successful in preventing or reducing (problematic) alcohol consumption among older adults. A systematic review of articles published between 2000 and 2022 was performed using PubMed, PsycINFO, Web of Science and CHINAHL. Realist evaluation was used to analyze the data. We found 61 studies on interventions aimed at preventing or reducing problematic alcohol use. Most of the interventions were not specifically designed for older adults but also included older adults. The findings of the current study highlight three major effective elements of interventions: (1) providing information on the consequences of alcohol consumption; (2) being in contact with others and communicating with them about (alcohol) problems; and (3) personalized feedback about drinking behavior. Two of these elements were also used in the interventions especially designed for older adults. Being in contact with others and communicating with them about (alcohol) problems is an important element to pay attention to for developers of alcohol interventions for older adults because loneliness is a problem for this age group and there is a relationship between the use of alcohol and loneliness.

Seeking treatment for mental illness and substance abuse: A cross-sectional study on attitudes, beliefs, and needs of military personnel with and without mental illness.

BACKGROUND: Often, military personnel do not seek treatment for mental illness or wait until they reach a crisis point. Effective, selective, and indicated prevention is best achieved by seeking treatment early. AIMS: We aimed to examine military personnel's attitudes, beliefs, and needs around seeking treatment for mental illness. We compared those who sought treatment to those who did not and those with and without the intention to seek treatment. Finally, we examined factors associated with intentions of not seeking treatment. METHOD: We conducted a cross-sectional questionnaire study of military personnel with (N = 324) and without (N = 554) mental illness. Descriptive and regression analyses (logistic and ordinal) were performed. RESULTS: The majority of the personnel believed treatment was effective (91.6%); however, most preferred to solve their own problems (66.0%). For personnel with mental illness, compared to those who sought treatment, those who did not had a higher preference for self-management and found advice from others less important. For those without mental illness, those with no intention to seek treatment indicated a higher preference for self-management, stigma-related concerns, denial of symptoms, lower belief in treatment effectiveness and found it less important to be an example, compared to those with treatment-seeking intentions. A clear indication of where to seek help was the most reported need (95.7%). Regression analyses indicated that not seeking treatment was most strongly related to preference for self-management (OR(95%CI) = 4.36(2.02-9.39); no intention to seek treatment was most strongly related to a lower belief that treatment is effective (OR(95%CI) = .41(0.28-0.59) and with not having had positive earlier experiences with treatment seeking (OR(95%CI) = .34(0.22-0.52). CONCLUSIONS: To facilitate (early) treatment seeking, interventions should align with a high preference for self-management, mental illness stigma should be targeted, and a clear indication of where to seek treatment is needed.

Impeding and facilitating factors for the implementation of alcohol interventions in hospitals: a qualitative and exploratory study among Dutch healthcare professionals.

BACKGROUND: Non-moderated alcohol use is more prevalent among hospitalized patients compared to the general population. However, many hospitals fail to find and intervene with people with alcohol problems. We aimed to conduct an exploration of impeding and facilitating factors experienced by healthcare professionals in implementation of alcohol interventions in Dutch general hospitals. In addition, we explored the alcohol interventions used in the selected hospitals and involved stakeholders. METHODS: Through a qualitative study, semi-structured telephone interviews were conducted with twenty healthcare professionals working in or in collaboration with six different general hospitals. RESULTS: Healthcare professionals indicated impeding and facilitating factors in the areas of motivation, knowledge and skills, patient characteristics, protocol, internal and external collaboration/support, resources, role suitability and societal support. Five different categories of approaches to identify and intervene with non-moderated alcohol use and 18 involved stakeholders from both inside and outside the hospital were found. CONCLUSIONS: Implementation of alcohol interventions for patients in Dutch general hospitals still seems to be in its infancy. Respondents emphasized the importance of one clear protocol on how to tackle alcohol problems within their hospital, repeated training on alcohol-related knowledge and skills, (clinical) "champions" that support healthcare professionals and developing and maintaining collaborations with stakeholders within and outside the hospital.

How Serious Is Debt Among Probation Clients? A Study Into the Prevalence and Scope of Debt in a Dutch Probation Sample.

Although studies point to a relationship between debt and crime, there is a limited understanding of their reciprocal relationship and possible mediating risk factors. Moreover, knowledge about the prevalence and scope of debt among offenders is lacking. Therefore, the present study analyzed 250 client files including risk assessment data from the Dutch probation service on the prevalence of debt and possibly related risk factors. The results show that debt is highly prevalent and complex, which underlines the importance of acquiring more knowledge about debt as a potential risk factor for relapse during supervision. It was found that problems with regard to childhood and living situation, education and work/daytime activities, and mental and physical health may be possible underlying risk factors in the relationship between debt and crime. These insights can help professionals adequately support clients with regard to debt in order to prevent recidivism.

Youth in transition: Study protocol of a prospective cohort study into the long-term course of addiction, mental health problems and social functioning in youth entering addiction treatment.

BACKGROUND: Substance use disorders (SUDs) are prevalent in the general population, tend to follow a chronic course, are associated with many individual and social problems, and often have their onset in adolescence. However, the knowledge base from prospective population surveys and treatment-outcome studies on the course of SUD in adolescents is limited at best. The present study aims to fill this gap and focuses on a subgroup that is particularly at risk for chronicity: adolescents in addiction treatment. We will investigate the rate of persistent SUD and its predictors longitudinally from adolescence to young adulthood among youth with DSM-5 SUD from the start of their addiction treatment to 2 and 4 years following treatment-entry. In addition to SUD, we will investigate the course of comorbid mental disorders, social functioning, and quality of life and their association with SUD over time. METHODS/DESIGN: In a naturalistic, multi-center prospective cohort design, we will include youths (n = 420), who consecutively enter addiction treatment at ten participating organizations in the Netherlands. Inclusion is prestratified by treatment organization, to ensure a nationally representative sample. Eligible youths are 16 to 22 years old and seek help for a primary DSM-5 cannabis, alcohol, cocaine or amphetamine use disorder. Assessments focus on lifetime and current substance use and SUD, non-SUD mental disorders, family history, life events, social functioning, treatment history, quality of life, chronic stress indicators (hair cortisol) and neuropsychological tests (computerized executive function tasks) and are conducted at baseline, end of treatment, and 2 and 4 years post-baseline. Baseline data and treatment data (type, intensity, duration) will be used to predict outcome - persistence of or desistance from SUD. DISCUSSION: There are remarkably few prospective studies worldwide that investigated the course of SUD in adolescents in addiction treatment for longer than 1 year. We are confident that the Youth in Transition study will further our understanding of determinants and consequences of persistent SUD among high-risk adolescents during the critical transition from adolescence to young adulthood. TRIAL REGISTRATION: The Netherlands National Trial Register Trial NL7928 . Date of registration January 17, 2019.

Decision (not) to disclose mental health conditions or substance abuse in the work environment: a multiperspective focus group study within the military.

OBJECTIVES: Many workers in high-risk occupations, such as soldiers, are exposed to stressors at work, increasing their risk of developing mental health conditions and substance abuse (MHC/SA). Disclosure can lead to both positive (eg, support) and negative (eg, discrimination) work outcomes, and therefore, both disclosure and non-disclosure can affect health, well-being and sustainable employment, making it a complex dilemma. The objective is to study barriers to and facilitators for disclosure in the military from multiple perspectives. DESIGN: Qualitative focus groups with soldiers with and without MHC/SA and military mental health professionals. Sessions were audiotaped and transcribed verbatim. Content analysis was done using a general inductive approach. SETTING: The study took place within the Dutch military. PARTICIPANTS: In total, 46 people participated in 8 homogeneous focus groups, including 3 perspectives: soldiers with MHC/SA (N=20), soldiers without MHC/SA (N=10) and military mental health professionals (N=16). RESULTS: Five barriers for disclosure were identified (fear of career consequences, fear of social rejection, lack of leadership support, lack of skills to talk about MHC/SA, masculine workplace culture) and three facilitators (anticipated positive consequences of disclosure, leadership support, work-related MHC/SA). Views of the stakeholder groups were highly congruent. CONCLUSIONS: Almost all barriers (and facilitators) were related to fear for stigma and discrimination. This was acknowledged by all three perspectives, suggesting that stigma and discrimination are considerable barriers to sustainable employment and well-being. Supervisor knowledge, attitudes and behaviour were critical for disclosure, and supervisors thus have a key role in improving health, well-being and sustainable employment for soldiers with MHC/SA. Furthermore, adjustments could be made by the military on a policy level, to take away some of the fears that soldiers have when disclosing MHC/SA.

The Strengths and Barriers Recovery Scale (SABRS): Relationships Matter in Building Strengths and Overcoming Barriers.

There is a well-established relationship between isolation and both morbidity and mortality in the context of addiction recovery, yet the protective effects of intimate and familial relationships have not been adequately assessed. The current paper uses the European Life In Recovery database to assess the association between relationship status and living with dependent children on recovery capital of people in recovery from drug addiction, operationalised by the Strengths And Barriers Recovery Scale (SABRS). The study participants were drawn from the REC-PATH study and supplemented by a second sample recruited by the Recovered Users Network (RUN) across various European countries, resulting in a combined sample of 1,313 individuals completing the survey, primarily online. The results show that, in recovery, those who are married or co-habiting reported significantly greater recovery strengths and fewer barriers to recovery, and reported greater gains in recovery capital across their recovery journeys. Similar associations are found for participants who have dependent children living with them. There is also some indication that this association is stronger for female than for male participants. Finally, having more people that one can rely on and a greater proportion of people in recovery in the social network are both linked to greater recovery capital and greater self-reported growth in recovery capital. We conclude that this study provides further evidence in favour of a "social cure" in recovery, in which close familial ties are associated with stronger recovery resources.

Examining the Intended and Unintended Impacts of Raising a Minimum Legal Drinking Age on Primary and Secondary Societal Harm and Violence from a Contextual Policy Perspective: A Scoping Review.

Raising a minimum legal drinking age (MLDA) has generated interest and debate in research and politics, but opposition persists. Up to now, the presentation of impacts focussed on effectiveness (i.e., intended impact); to our knowledge, no literature syntheses focussed on both intended and unintended impacts. A systematic scoping review was conducted in which a search strategy was developed iteratively and literature was obtained from experts in alcohol research and scientific and grey databases. Ninety-one studies were extracted and analysed using formative thematic content analysis. Intended impacts were reported in 119 units of information from the studies (68% positive), forming four paths: implementation, primary and (two) on secondary societal harm and violence. Unintended developments were reported in 43 units of information (30% positive), forming five themes. Only eight studies reported on implementation. Furthermore, a division between primary and secondary paths and the use of a bridging variable (drinking patterns in analyses or methodology) was discovered. These results provide an insight into how well legislation works and can be used to discover or implement new means of curbing underage drinking and alcohol-related violence and harm. They also offer valuable starting points for future research and underline the importance of considering unintended developments.

Empowering Native Adolescents: Responsibility for Their Health Behaviors.

Objectives: In this study, we assess the impact of a home-based diabetes prevention program, Together on Diabetes (TOD), on adolescent responsibility-taking for tasks related to diabetes risk. Methods: Participants were Native American youth ages 10-19 with or at risk of type 2 diabetes who participated in a 12-session, 6-month diabetes prevention program with an adult caretaker. Assessments completed at baseline, 6-month, and 12-month follow-up include demographics and the Diabetes and Obesity Task Sharing (DOTS) Questionnaire. We used latent class analysis (LCA) at baseline to examine heterogeneity in DOTS responses. We identified 3 classes (adolescent, shared, caretaker). We used latent transition analysis to examine stability and change in latent status at baseline, 6- and 12-month follow-up. Results: At baseline, the mean age of participants was 13.6 years and 55.9% were boys. From baseline to 6-month follow-up, the adolescent class was most stable, whereas the shared and caretaker classes were less stable. For participants who transition from the adolescent class, most transition to shared class compared to caretaker class. Conclusions: TOD helps to empower Native American adolescents to take responsibility for their health and engage with their caregivers in these decisions.

Psychometric Properties of the QoL-ME: A Visual and Personalized Quality of Life Assessment App for People With Severe Mental Health Problems.

Background: Quality of Life (QoL) assessment in people with severe mental health problems may benefit from improved personalization and accessibility. Therefore, an innovative, digital, visual, and personalized QoL assessment app for people with severe mental health problems was recently developed: the QoL-ME. The aim of this study was to evaluate the psychometric quality of the QoL-ME by assessing its reliability, validity, and responsiveness. Methods: To examine the reliability of the QoL-ME, the internal consistency of its subscales was assessed using Cronbach's Alpha. Correlations between the QoL-ME and the MANSA were computed to appraise the construct validity of the QoL-ME. Internal responsiveness was evaluated using the standardized response mean and external responsiveness was investigated using hierarchical regression. Results: Cronbach's Alpha's of the subscales of the QoL-ME ranged between 0.5 and 0.84. In accordance with expectations, the language-based core version of the QoL-ME correlated strongly (r = between 0.55 and 0.76) with the MANSA, whilst the picture-based additional modules of the QoL-ME correlated moderately (r = 0.3) with the MANSA. The standardized response mean was 0.23 and the regression model revealed a coefficient ß of -0.01. Conclusions: The QoL-ME has adequate psychometric properties. In comparison with similar pictorial instruments, both the QoL-ME's reliability and validity can be considered as sufficient. The results indicate that the responsiveness of the QoL-ME is insufficient. Additional research is needed to evaluate and potentially modify the instrument to improve its responsiveness.

Sleep characteristics across the lifespan in 1.1 million people from the Netherlands, United Kingdom and United States: a systematic review and meta-analysis.

We aimed to obtain reliable reference charts for sleep duration, estimate the prevalence of sleep complaints across the lifespan and identify risk indicators of poor sleep. Studies were identified through systematic literature search in Embase, Medline and Web of Science (9 August 2019) and through personal contacts. Eligible studies had to be published between 2000 and 2017 with data on sleep assessed with questionnaires including ≥100 participants from the general population. We assembled individual participant data from 200,358 people (aged 1-100 years, 55% female) from 36 studies from the Netherlands, 471,759 people (40-69 years, 55.5% female) from the United Kingdom and 409,617 people (≥18 years, 55.8% female) from the United States. One in four people slept less than age-specific recommendations, but only 5.8% slept outside of the 'acceptable' sleep duration. Among teenagers, 51.5% reported total sleep times (TST) of less than the recommended 8-10 h and 18% report daytime sleepiness. In adults (≥18 years), poor sleep quality (13.3%) and insomnia symptoms (9.6-19.4%) were more prevalent than short sleep duration (6.5% with TST < 6 h). Insomnia symptoms were most frequent in people spending ≥9 h in bed, whereas poor sleep quality was more frequent in those spending <6 h in bed. TST was similar across countries, but insomnia symptoms were 1.5-2.9 times higher in the United States. Women (≥41 years) reported sleeping shorter times or slightly less efficiently than men, whereas with actigraphy they were estimated to sleep longer and more efficiently than man. This study provides age- and sex-specific population reference charts for sleep duration and efficiency which can help guide personalized advice on sleep length and preventive practices.