Health Effects of High-Concentration Cannabis Products: Scoping Review and Evidence Map.

Background. The concentration of pharmacologically active tetrahydrocannabinol (THC) in cannabis products has been increasing over the past decade. Concerns about potential harmful health effects of using these increasingly higher-concentration products have led some states to consider regulation of cannabis product THC concentration. We conducted a scoping review of health effects of high-concentration cannabis products to inform policy on whether the THC concentrations of cannabis product should be regulated or limited. Objectives. We conducted a scoping review to (1) identify and describe human studies that explore the relationship of high-concentration cannabis products with any health outcomes in the literature and (2) create an interactive evidence map of the included studies to facilitate further analyses. Search Methods. An experienced medical information specialist designed a comprehensive search strategy of 7 electronic databases. Selection Criteria. We included human studies of any epidemiological design with no restrictions by age, sex, health status, country, or outcome measured that reported THC concentration or included a known high-concentration cannabis product. Data Collection and Analysis. We imported search results into Distiller SR, and trained coders conducted artificial intelligence‒assisted screening. We developed, piloted, and revised data abstraction forms. One person performed data abstraction, and a senior reviewer verified a subset. We provide a tabular description of study characteristics, including exposures and outcomes measured, for each included study. We interrogated the evidence map published in Tableau to answer specific questions and provide the results as text and visual displays. Main Results. We included 452 studies in the scoping review and evidence map. There was incomplete reporting of exposure characteristics including THC concentration, duration and frequency of use, and products used. The evidence map shows considerable heterogeneity among studies in exposures, outcomes, and populations studied. A limited number of reports provided data that would facilitate further quantitative synthesis of the results across studies. Conclusions. This scoping review and evidence map support strong conclusions concerning the utility of the literature for characterizing risks and benefits of the current cannabis marketplace and the research approaches followed in the studies identified. Relevance of the studies to today's products is limited. Public Health Implications. High-quality evidence to address the policy question of whether the THC concentration of cannabis products should be regulated is scarce. The publicly available interactive evidence map is a timely resource for other entities concerned with burgeoning access to high-concentration cannabis. (Am J Public Health. 2023;113(12):1332-1342. https://doi.org/10.2105/AJPH.2023.307414).

Caring for Adults With Significant Levels of Intellectual Disability in Outpatient Settings: Results of a National Survey of Physicians.

Between 1% and 2% of the U.S. population has an intellectual disability (ID) and often experience disparities in health care. Communication patterns and sedation use for routine medical procedures are important aspects of care for this population. We explored physicians' communication patterns and sedation use in caring for patients with significant levels of ID through a mailed survey of 1,400 physicians among seven specialties in outpatient settings (response rate = 61.0%). Among physicians who saw at least one patient with significant levels of ID in an average month, 74.8% reported usually/always communicating primarily with someone other than the patient. Among specialists, 85.5% (95% CI: 80.5%-90.5%) reported doing so, compared to 69.9% (95% CI: 64.4%-75.4%) for primary care physicians (p < 0.001). Also, 11.4% reported sedating at least one patient with significant levels of ID for a routine procedure. Three quarters of physicians reported communicating primarily with persons other than the patient usually or always-an approach that, in some instances, may not align with best medical practice. The percentage of physicians who report sedating at least one individual is associated with significant ID and the physician's volume of patients with significant ID.

Experts identified warning signs of fraudulent research: a qualitative study to inform a screening tool.

OBJECTIVE: Fraudulent research exists but can be difficult to spot. Made-up studies and results can affect systematic reviews and clinical guidelines, causing harm through incorrect treatments and practices. Our aim was to explore indicators of research fraud that could be included in a screening tool to identify potentially problematic studies warranting a closer scrutiny. STUDY DESIGN AND SETTING: We conducted a qualitative international interview study, purposively recruiting participants with experience and/or expertise in research integrity, systematic reviews, biomedical publishing, or whistle-blowing research fraud. We used a thematic analysis to identify major concepts and ideas. RESULTS: We contacted 49 potential participants and interviewed 30 from 12 countries. Participants described research fraud as a growing concern, with a lack of widely accessible resources or education to assist in flagging problematic studies. They discussed early warning signs that could be contained in a screening tool for use either prepublication or postpublication. We did not speak to participants from indexing services, information software/analytics companies, or the public. Our suggested screening tools are empirically derived but are preliminary and not validated. CONCLUSION: A practical tool of early warning signs for research fraud would be useful for peer reviewers, editors, publishers, and systematic reviewers.

Barriers to metabolic bariatric surgery in adolescents: results of a qualitative study.

BACKGROUND: It is estimated that 4.5 million youth in the United States have severe obesity (SO). Metabolic and bariatric surgery (MBS) is the most effective and longitudinally durable treatment for adolescents with SO, but only an estimated 1600 adolescents undergo the procedure annually. OBJECTIVE: To understand patients' perceptions and experiences with the barriers to MBS as an adolescent. SETTING: This research was conducted at Children's Hospital Colorado, an urban academic medical center, and the University of Colorado Anschutz School of Medicine and Sanford Research, a rural medical center. METHODS: We conducted 14 qualitative interviews with individuals who received MBS between the ages of 19 and 25 years in the last 5 years regarding the barriers to MBS they experienced as an adolescent. A formal qualitative analysis was conducted using the constant comparative techniques of grounded theory generally guided by Anderson's behavioral model of health service use. RESULTS: We identified 3 principal groups of barriers related to (1) a lack of information that MBS was an option and the absence of discussions about MBS with medical providers while an adolescent, (2) a lack of access to MBS primarily related to insurance coverage, costs, and family-related issues, and (3) a general stigma around MBS as a treatment for obesity. CONCLUSION: This study suggests that the primary barriers to MBS for adolescents with SO are related to a general lack of information about MBS, social stigma, and access issues related to costs that decrease or limit access.

Cross-sectional study of preprints and final journal publications from COVID-19 studies: discrepancies in results reporting and spin in interpretation.

OBJECTIVE: To compare results reporting and the presence of spin in COVID-19 study preprints with their finalised journal publications. DESIGN: Cross-sectional study. SETTING: International medical literature. PARTICIPANTS: Preprints and final journal publications of 67 interventional and observational studies of COVID-19 treatment or prevention from the Cochrane COVID-19 Study Register published between 1 March 2020 and 30 October 2020. MAIN OUTCOME MEASURES: Study characteristics and discrepancies in (1) results reporting (number of outcomes, outcome descriptor, measure, metric, assessment time point, data reported, reported statistical significance of result, type of statistical analysis, subgroup analyses (if any), whether outcome was identified as primary or secondary) and (2) spin (reporting practices that distort the interpretation of results so they are viewed more favourably). RESULTS: Of 67 included studies, 23 (34%) had no discrepancies in results reporting between preprints and journal publications. Fifteen (22%) studies had at least one outcome that was included in the journal publication, but not the preprint; eight (12%) had at least one outcome that was reported in the preprint only. For outcomes that were reported in both preprints and journals, common discrepancies were differences in numerical values and statistical significance, additional statistical tests and subgroup analyses and longer follow-up times for outcome assessment in journal publications.At least one instance of spin occurred in both preprints and journals in 23/67 (34%) studies, the preprint only in 5 (7%), and the journal publications only in 2 (3%). Spin was removed between the preprint and journal publication in 5/67 (7%) studies; but added in 1/67 (1%) study. CONCLUSIONS: The COVID-19 preprints and their subsequent journal publications were largely similar in reporting of study characteristics, outcomes and spin. All COVID-19 studies published as preprints and journal publications should be critically evaluated for discrepancies and spin.

Dynamic stiffening of poly(ethylene glycol)-based hydrogels to direct valvular interstitial cell phenotype in a three-dimensional environment.

Valvular interstitial cells (VICs) are active regulators of valve homeostasis and disease, responsible for secreting and remodeling the valve tissue matrix. As a result of VIC activity, the valve modulus can substantially change during development, injury and repair, and disease progression. While two-dimensional biomaterial substrates have been used to study mechanosensing and its influence on VIC phenotype, less is known about how these cells respond to matrix modulus in a three-dimensional environment. Here, we synthesized MMP-degradable poly(ethylene glycol) (PEG) hydrogels with elastic moduli ranging from 0.24 kPa to 12 kPa and observed that cell morphology was constrained in stiffer gels. To vary gel stiffness without substantially changing cell morphology, cell-laden hydrogels were cultured in the 0.24 kPa gels for 3 days to allow VIC spreading, and then stiffened in situ via a second, photoinitiated thiol-ene polymerization such that the gel modulus increased from 0.24 kPa to 1.2 kPa or 13 kPa. VICs encapsulated within soft gels exhibited αSMA stress fibers (∼ 40%), a hallmark of the myofibroblast phenotype. Interestingly, in stiffened gels, VICs became deactivated to a quiescent fibroblast phenotype, suggesting that matrix stiffness directs VIC phenotype independent of morphology, but in a manner that depends on the dimensionality of the culture platform. Collectively, these studies present a versatile method for dynamic stiffening of hydrogels and demonstrate the significant effects of matrix modulus on VIC myofibroblast properties in three-dimensional environments.