Peer effects on health-related behaviours of adolescents in Scotland using social network analysis: a cross-sectional study.

BACKGROUND: Previous research suggests that adolescent norms and behaviours may be influenced by peers. The aim of this study was to investigate social clustering of health outcomes among school friendship groups. METHODS: Cross-sectional surveys were collected from Oct 26, 2022, to March 30, 2023, in four secondary schools in Scotland's central belt, and all Secondary 2 (12-13 years) and Secondary 4 (14-15 years) students were invited to take part. Schools self-selected into the study, between 6% and 27% had a free school meal registration (Scotland average 25%). The survey asked about health and about friendships in school. The outcomes of interest were binary indicators of: mental health and self-esteem using validated scales, smoking, drinking without parents knowing (DWPK), and trying drugs. Ethics approval for the study was given by the University of Glasgow (200190035) and all participants gave consent via an online form. We used Auto-Logistic Actor Attribute Models (ALAAMs) to model the association between features of individuals' social networks and their health outcomes. We specified a model for each health outcome separately including parameters: indegree, outdegree, and simple contagion, and combined using meta-analysis. FINDINGS: Response rate was 74% (n=1097; 50% boys, 46% girls, 4% other). Based on self-report measures, 40% participants had poor mental health, 15% had low self-esteem, 6% smoked regularly, 4% tried drugs, and 18% were drinking without parents knowing. Preliminary unadjusted analysis found evidence of social contagion for mental health. Odds of poor mental health for each additional friend with poor mental health was 1·15 (95% CI 1·05-1·26). There was no evidence of contagion for self-esteem (1·13, 0·95-1·34), smoking (1·14, 0·46-2·82), DWPK (0·88, 0·71-1·10), and having tried drugs (0·91, 0·38-2·19). Some networks had low or zero prevalence of the outcomes, increasing the uncertainty in the pooled estimate for the contagion parameter. INTERPRETATION: A cross-sectional study cannot differentiate between social contagion and selecting similar friends, and low prevalence and social desirability bias might have masked associations. However, the unique combination of social network data with advanced statistical modelling gives initial findings on the potential communicable nature of mental health and health behaviours in adolescence. Preliminary results indicate preventive approaches in schools could benefit from social network methods. FUNDING: Medical Research Council (MRC) and Chief Scientist Office (CSO).

Dietary NO3- does not enhance endothelial dependent cutaneous vascular conductance in older women.

Prior work has yet to determine whether the reduction of dietary nitrate (NO3-) to NO, via the enterosalivary pathway, may modify cutaneous vascular conductance (CVC) responses to local heating in older women. Changes occurring with the transition to menopause related to hormonal flux, increased adiposity, and/or decreased physical activity may further compound the negative influence of aging on nitric oxide (NO)-dependent CVC. Herein, we characterized changes in NO-dependent CVC following acute ingestion of 140 mL of NO3--rich beetroot juice in 24 older women (age: 65 ± 5 y, BMI: 31.2 ± 3.7 kg/m2). Red blood cell (RBC) flux was measured continuously via laser-Doppler flowmetry on the dorsal aspect of the forearm during local skin heating to 39 °C/44 °C before and 3 h after NO3- ingestion. NO-dependent changes in CVC were calculated as RBC flux/mean arterial blood pressure at 39 °C and normalized as a proportion of maximal CVC at 44 °C (%CVCmax). Changes (Δ) in fractional exhaled NO (FeNO) following NO3- ingestion were used an index of NO bioavailability. Despite increased FeNO (+81 ± 70 %, P < 0.001), %CVCmax at 39 °C was reduced (-16 ± 10 %, P < 0.001) following NO3- ingestion. A greater reduction in %CVCmax was weakly to moderately associated with higher body fat% (r = 0.45 [0.05-0.72], P = 0.029), central adiposity% (r = 0.50 [0.13-0.75], P = 0.012), neutrophil% (r = 0.42 [0.02-0.70], P = 0.041), and higher neutrophil to lymphocyte ratio (r = 0.49 [0.11-0.75], P = 0.016). These findings demonstrate a single dose of dietary NO3- does not promote CVC responses to local heating in sedentary older women with overweight and obesity. Correlation with multiple biomarkers suggest systemic inflammation may be involved.

Walking net V ˙ O2 rises with advancing age in older women: where to go from here?

PURPOSE: Walking net V ˙ O2 tends to increase with advancing age; however, factors contributing to this relationship have not been widely described. The implications of such findings could inform targeted strategies to promote independent mobility in older adults. Herein, we evaluated the relationship between net V ˙ O2 and age at two submaximal workloads while exploring potential moderators of this relationship. METHODS: Secondary analyses were performed on 35 older (65 ± 3 years) women who completed a battery of physical assessments including fixed-speed, non-graded and graded (+ 2.5%) treadmill walking with indirect calorimetry to determine net V ˙ O2. Maximal oxygen uptake ( V ˙ O2max), knee extensor maximal isometric voluntary contraction (MVC), peak rate of torque development (RTD), and plantar flexor range-of-motion (PFROM) were also measured. RESULTS: Bivariate correlations showed non-graded (r = 0.403, p = 0.017) and graded (r = 0.413, p = 0.014) net V ˙ O2 were positively related to age. Notably, these relationships strengthened after adjusting for V ˙ O2max. Regression modeling showed age, RTD:MVC ratio (composite of muscle performance), and PFROM together explained 49% and 34% of the variance in non-graded and graded net V ˙ O2, respectively. Further analyses suggested knee extensor MVC moderates the relationship between non-graded net V ˙ O2 and age, accounting for 9% of the variance [ΔR2 = 0.090, F (1,31) = 4.13, p = 0.05]. CONCLUSION: These data support the premise that, in older women, walking net V ˙ O2 rises with advancing age, and additionally, the RTD:MVC ratio and PFROM are independent correlates of non-graded net V ˙ O2. Exercise interventions with a high degree of training specificity including explosive, velocity-based elements may promote independent mobility in older women.

Patient Comfort with Before and After Photography at Plastic Surgery Offices.

BACKGROUND: Before and after (B&A) photographs are a sensitive part of patients' medical records, and the use of smartphones may pose risks to confidentiality and comfort. The purpose of this study was to assess patient comfort depending on the circumstances under which these photographs being taken. METHODS: Amazon's Mechanical Turk crowdsourcing service and REDCap's survey manager were used to recruit survey participants. An anonymous survey was distributed to ascertain demographics and comfort in various B&A scenarios using a five-point Likert scale. T tests and ANOVA testing were used to compare groups. RESULTS: There were 411 respondents with an average age of 36.1 years old. Of them, 46% were female and the majority were White (90%) and non-Hispanic (64%). Nearly one-third had previously undergone plastic surgery, with 80% receiving B&A photography. Surgeons took these photographs 51% of the time with similar rates of smartphone cameras use (47%) versus professional cameras (52%). The public had similar levels of comfort when a nurse or a surgeon took the clinical photographs (p = 0.08). Patients were significantly less comfortable when non-medically trained office staff captured their photographs (p = 0.0041). The public had similar comfort levels with the use of smartphones and professional cameras when dressed but were significantly less comfortable with the use of a smartphone when unclothed (p = < 0.001). CONCLUSION: To ensure the best patient experience, B&A photography should be taken by a medical professional. If photographs are to be taken when the patient is unclothed, the use of a professional-grade camera may help ease patient discomfort. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Post-Mastectomy Tissue Expander Placement Followed by Radiation Therapy: A Cost-Effectiveness Analysis of Staged Autologous Versus Implant-Based Unilateral Reconstruction.

BACKGROUND: There is no preferred approach to breast reconstruction for patients with locally advanced breast cancer (LABC) who require post-mastectomy radiation therapy (PMRT). Staged implant and autologous reconstruction both have unique risks and benefits. No previous study has compared their cost-effectiveness with utility scores. METHODS: A literature review determined the probabilities and outcomes for mastectomy and staged implant or autologous reconstruction. Utility scores were used to calculate the quality-adjusted life years (QALYs) associated with successful surgery and postoperative complications. Medicare billing codes were used to assess costs. A decision analysis tree was constructed with rollback and incremental cost-effectiveness ratio (ICER) analyses. Sensitivity analyses were performed to validate results and account for uncertainty. RESULTS: Mastectomy with staged deep inferior epigastric perforator (DIEP) flap reconstruction is costlier ($14,104.80 vs $3216.93), but more effective (QALYs, 29.96 vs 24.87). This resulted in an ICER of 2141.00, favoring autologous reconstruction. One-way sensitivity analysis showed that autologous reconstruction was more cost-effective if less than $257,444.13. Monte Carlo analysis showed a confidence of 99.99% that DIEP flap reconstruction is more cost-effective. CONCLUSIONS: For patients with LABC who require PMRT, staged autologous reconstruction is significantly more cost-effective than reconstruction with implants. Despite the decreased morbidity, staged implant reconstruction has greater rates of complication.

The microbiota-gut-brain axis and perceived stress in the perinatal period.

Perinatal perceived stress can contribute to worse health outcomes for the parent-child dyad. Given the emerging relationship between the microbiota-gut-brain axis and stress, this study sought to elucidate connections between bowel symptoms and the gut microbiome in relation to perceived stress at three time points in the perinatal period: two during pregnancy and one postpartum. Ninety-five pregnant individuals participated in a prospective cohort study from April 2017 to November 2019. Researchers assessed Perceived Stress Scale-10 (PSS); bowel symptoms (according to the IBS Questionnaire); psychiatrist assessment of new onset or exacerbated depression and anxiety; and fecal samples analyzed for alpha diversity (measures of gut microbiome diversity utilizing Shannon, Observed OTUs, and Faith's PD) at each timepoint. Covariates included weeks of gestation and weeks postpartum. PSS scores were divided into "Perceived Self-Efficacy" and "Perceived Helplessness." Increased gut microbial diversity was associated with decreased bowel symptoms, decreased overall perceived stress, increased ability to cope with adversity, and decreased distress in the postpartum period. This study found a significant association between a less diverse microbial community, lower self-efficacy early in pregnancy, and greater bowel symptoms and perceived helplessness later in the perinatal period, relationships that may ultimately point to novel diagnostic methods and interventions for perceived stress based on the microbiota-gut-brain axis.

Loneliness and personal well-being in young people: Moderating effects of individual, interpersonal, and community factors.

INTRODUCTION: Loneliness is prevalent among young people. But, there is little work exploring the association between loneliness with well-being among this age group. Framed by social-ecological theory, we examined demographic, interpersonal, and community factors associated with personal wellbeing and, critically, identified malleable moderators of the relationship between loneliness and well-being that could be targeted in intervention efforts. METHODS: We used cross-sectional, secondary data from 965 young people (aged 16-24) from the Community Life Survey in England. Loneliness was measured using a single-item direct measure; personal wellbeing was measured through a composite measure containing items assessing happiness, life satisfaction, and a sense that life is worthwhile (α = 0.88). Regression techniques were used to assess associations between individual, interpersonal, and community factors and well-being, and to identify moderators of the relationship between loneliness and well-being. RESULTS: Loneliness was negatively associated with well-being. Chatting with neighbors and having people to provide help moderated the relationship between loneliness and well-being. Full-time students and those with good physical health had higher well-being while being a carer was predictive of lower well-being. All community variables were strongly associated with increased well-being. Of all interpersonal variables investigated, only having people to count on was associated with increased well-being. CONCLUSIONS: Our results demonstrate that supportive relationships and close community ties are important for reducing the negative impact of loneliness on youth well-being. Interventions to improve well-being could benefit from targeting these aspects of young people's social and community lives, while acknowledging individual vulnerabilities, such as poor physical health.

Applications of Ultrasound in the Postoperative Period: A Review.

BACKGROUND: Recent advances in ultrasound technology have further increased its potential for routine use by plastic and reconstructive surgeons. METHODS: An extensive literature review was performed to determine the most common applications of ultrasound in the postoperative care of plastic and reconstructive surgery patients. RESULTS: In contrast with other available imaging modalities, ultrasound is cost-effective, rapid to obtain, eliminates the need for ionizing radiation or intravenous contrast, and has virtually no contraindications. In addition to its diagnostic capabilities, ultrasound can also be used to facilitate treatment of common postoperative concerns conveniently at the bedside or in an office setting. CONCLUSION: This article presents a review of the current applications of ultrasound imaging in the postoperative care of plastic and reconstructive surgery patients, including free flap monitoring following microsurgery, diagnosis and treatment of hematoma and seroma, including those associated with BIA-ALCL, and breast implant surveillance.

School Climate, Peer Relationships, and Adolescent Mental Health: A Social Ecological Perspective.

The current study investigated peer relationship and school climate factors associated with adolescent mental health. Cross-sectional data from 2,571 fifteen-year old students in 22 Scottish secondary schools was used. Multilevel models tested for school differences in mental health, and nested linear regression models estimated peer and school effects. Results demonstrated no significant between-school variation in mental health. Peer victimization was the only peer effect associated with mental health. School-belonging, student-teacher relationships, and a perceived inclusive school climate were associated with better mental health, whereas a perceived school climate of exam pressure was associated with worse mental health. The findings highlight multiple aspects of school climate that could be targeted in school-based interventions for adolescent mental health.

Plastic Surgery Patient Expectations for Postoperative Opioid Prescriptions.

BACKGROUND: The opioid epidemic is a healthcare crisis perpetuated by analgesic overprescribing. Despite public health attention on this issue, expectations for pain management and opioid use by plastic surgery patients are poorly understood. This study aimed to evaluate patient expectations of postoperative pain, concern for opioid dependence, and anticipated analgesic plan after plastic surgery. METHODS: New patients presenting to an academic plastic surgery clinic were prospectively enrolled from November 2017 to September 2018. These patients completed a preconsultation survey regarding their pain history and anticipated postoperative pain and analgesics regimens. Responses between cohorts expecting and not expecting postoperative opioids were compared using descriptive and univariate analyses. RESULTS: A total of 168 patients (63.9% female, 36.1% male; mean ± SD age 46 ± 17 years) completed the survey before breast (21.9%), cosmetic (5.3%), craniofacial (3.0%), general reconstruction (13.0%), hand (3.0%), and skin and soft tissue (49.1%) surgeries. Twenty-eight percent of patients expected opioid prescriptions. On a standard visual analog scale, patients who expected opioids anticipated greater postoperative pain (6.9 vs 4.6, P < 0.05). They were more concerned about experiencing pain (5.8 vs 4.9, P < 0.05), expected a longer duration of opioid use (63.0% vs 37.0%, P < 0.05), and were less interested in nonnarcotic analgesic alternatives (57.9% vs 19.8%, P < 0.05). CONCLUSIONS: Less than one-third of plastic surgery patients in this study expect opioid pain medications after surgery. This supports broader use of nonopioid, multimodal pain regimens. Identification and management of patient pain expectations, especially among those anticipating a need for opioids, provide a critical opportunity for preoperative education on the benefits of nonopioid analgesics, thus minimizing opiate prescribing.

Perceived Social Acceptability and Longitudinal Trends in Adolescent Cigarette Smoking.

The current study uses methods from social network analysis to predict longitudinal trends in adolescent cigarette smoking based on perceived social acceptability from friends, in addition to typical measures of peer influence (e.g., self-reported cigarette use of friends). By concurrently investigating the role of perceived social acceptability of smoking and peer influence, the current study offers new insight into the mechanisms through which peers influence adolescent smoking. Two waves of data from five high schools within one US school district (n = 1563) were used. Stochastic actor-based models simultaneously estimated changes in smoking predicted by perceived social acceptability and peer influence. Findings demonstrate that adolescents with higher perceived social acceptability of cigarette use increased cigarette smoking over time. Conversely, support for peer influence on smoking was not found after controlling for the effects of perceived social acceptability. The results suggest that perceived social acceptability regarding cigarette smoking rather than self-report of cigarette use among friends is predictive of future smoking behavior. Consequently, the findings highlight the need for prevention efforts to take into account the multifaceted dynamics between adolescent smoking and friendships. Programs that address peer influence alone, without considering peer mechanisms such as perceived social acceptability, are at risk of ignoring critical avenues for prevention.

The Dynamic Relationship between Unhealthy Weight Control and Adolescent Friendships: A Social Network Approach.

Although adolescence marks a vulnerable stage for peer influence on health behavior, little is known about the longitudinal and dynamic relationship between adolescent friendship and weight control. The current study aims to explain these dynamic processes among a sample of 1156 American adolescents in grades 9-11 (48.6% girls, 23.4% European American, 25.2% African American) from the National Longitudinal Study of Adolescent Health. Stochastic actor-oriented models were fit to examine changes in friendship networks and unhealthy weight control across two waves. The findings support a bidirectional relationship where weight control predicts future friendship seeking and friendship seeking predicts future weight control. The findings also indicate that adolescents prefer friends with similar weight control patterns. Taken together, the results of the current study indicate that adolescent friendships play an integral role in the development of unhealthy weight control and thus can be used to identify adolescents at risk and serve as targets within preventive interventions.

Racial/Ethnic Disparities in Measures of Self-reported Psychosocial States and Traits during Pregnancy.

Background The aim of this study was to determine whether racial/ethnic differences in psychosocial measures, independent of economic status, exist among a large population of pregnant nulliparas. Methods Between October 2010 and September 2013, nulliparous women at eight U.S. medical centers were followed longitudinally during pregnancy and completed validated instruments to quantify several psychosocial domains: Cohen Perceived Stress Scale, trait subscale of the Spielberger Anxiety Inventory, Connor-Davidson Resilience Scale, Multidimensional Scale of Perceived Social Support, Krieger Racism Scale, Edinburgh Postnatal Depression Scale, and the Pregnancy Experience Scale. Scores were stratified and compared by self-reported race, ethnicity, and income. Results Complete data were available for 8,128 of the 10,038 women enrolled in the study. For all measures, race and ethnicity were significantly associated (p < 0.001) with survey scores. Non-Hispanic black (NHB) women were most likely to score in the most unfavorable category for all measures, with the exception of the Pregnancy Experience Scale. The magnitude of these differences did not differ by income status (interaction, p > 0.05) except on the Krieger racism survey and the Edinburgh depression survey, which were exacerbated among NHB women with higher income (interaction, p < 0.001). Conclusion Significant racial/ethnic disparities, independent of income status, exist in psychosocial measures during pregnancy.

Starting an undergraduate degree amid the COVID-19 pandemic: A mixed-method egocentric network study on student loneliness.

Students who began their undergraduate university studies in the midst of the COVID-19 pandemic (the 'COVID cohort'), may have been particularly at risk for experiencing increased loneliness. This study employed an exploratory egocentric network and mixed-methods approach to investigate the links between social networks and loneliness in the COVID cohort. Of sixty-one respondents meeting inclusion criteria for the study, fifty-eight first-year undergraduate students from the September 2020 intake at a large Scottish University provided egocentric network data via an online survey, as well as responses to three open-ended questions which were aimed at generating qualitative data about participants' experiences of starting university in the context of the COVID-19 pandemic. Bivariate analyses suggest that having a larger social network, and higher satisfaction with that network, was associated with reduced loneliness. We additionally explored these associations in subsamples of students living on-campus and living off-campus. Our qualitative data adds valuable insight into the impact that pandemic-related social-distancing restrictions had on limiting students' opportunities for meeting their peers and forging meaningful social connections at university. Limitations of this study include a small sample size and an exploratory approach requiring further investigation and replication. However, in the context of universities continuing to use hybrid teaching models, this study provides useful initial insights, highlighting potential avenues for institutions to support students in developing social connections in the transition to higher education.

Loneliness in the Digital World: protocol for a co-produced ecological momentary assessment study in adolescents.

INTRODUCTION: Loneliness has been identified as an important public health issue, peaking during adolescence. Previous research has suggested that social interaction is a key factor in loneliness, and positive social interaction can act as a protective factor against loneliness. However, it is unclear whether there are differing impacts of in-person and online social interaction on adolescents' loneliness and mental health. Ecological Momentary Assessment (EMA) designs are ideally suited for better understanding these associations. METHOD AND ANALYSIS: In the 'Loneliness in the Digital World' study, we will use a co-developed EMA design to capture daily social interactions, loneliness and mental health such as positive and negative emotions, depression and anxiety in approximately 200 adolescents aged 12-15 years. We will combine this with comprehensive information gathered from online surveys. Analysing the data using techniques such as dynamic structural equation modelling, we will examine, among other research questions, the associations between online and in-person social interaction and feelings of loneliness. The results can help inform interventions to support adolescents with high levels of loneliness and poor mental health. ETHICS AND DISSEMINATION: We received the ethics approval for the data collection from The Academic and Clinical Central Office for Research and Development, followed by the College of Medicine and Veterinary Medicine Ethics panel at University of Edinburgh, and finally reviewed by East of Scotland Research Ethics Service. The results will be disseminated through journal publications, conferences and seminar presentations and to relevant stakeholders such as teachers.

TikTok: Is It Time to Start Trending with #PlasticSurgery?

BACKGROUND: TikTok is a short-form video social media platform created in 2016 that has rapidly grown in popularity. The aim of this study was to examine trending plastic surgery videos on TikTok and to understand the dynamics of the #PlasticSurgery conversation on this relatively new social media platform. METHODS: A prospective analysis of TikTok videos identified by directly querying the platform using #PlasticSurgery was performed during November of 2020. Top trending videos at time of data collection, defined as having more than 100,000 likes, were included. Videos were analyzed for user credentials, video engagement (number of views, likes, shares, and comments), associated hashtags, and video purpose and content. RESULTS: The top 376 trending videos were viewed a total of 1,680,910,700 times at time of analysis. Videos made by board-certified plastic surgeons were, on average, more popular than videos made by non-plastic surgeons [490.4 versus 378.6 million likes ( P = 0.006); 5.1 versus 3.8 billion views ( P = 0.046)]. The most popular procedures featured were augmentation mammaplasty (531,143,800 views; 42,825,400 likes), followed by body contouring procedures such as liposuction and abdominoplasty (276,810,500 views; 22,362,000 likes) and rhinoplasty (243,724,100 views; 27,588,200 likes). Educational videos on average had significantly higher levels of engagement than entertainment-focused videos [549,336 versus 340,163 likes ( P = 0.002); 6.3 versus 2.9 million views ( P < 0.001)]. CONCLUSIONS: Videos about plastic surgery, particularly educational videos by board-certified plastic surgeons, perform exceptionally well on the TikTok platform. TikTok presents an opportunity for plastic surgeons to educate patients about plastic surgery procedures and to present themselves as board-certified plastic surgeons.

Is action understanding an automatic process? Both cognitive and perceptual processing are required for the identification of actions and intentions.

The ability to identify others' actions and intentions, "action understanding," is crucial for successful social interaction. Under direct accounts, action understanding takes place without the involvement of inferential processes, a claim that has yet to be tested using behavioural measures. Using a dual-task paradigm, the present study aimed to establish whether the identification of others' actions and intentions depends on automatic or inferential processing, by manipulating working memory load during performance of a task designed to target the identification of actions and intentions. Experiment 1 tested a novel action understanding task targeting action identification and intention identification. This task was then combined with two working memory manipulations (cognitive: Experiment 2; perceptual: Experiment 3) to determine whether action identification and intention identification are disrupted by concurrent cognitive or perceptual load. Both action identification and intention identification were impaired by concurrent cognitive and perceptual processing, indicating that action understanding requires additional perceptual and cognitive resources. These findings contradict a direct account of action understanding.

Mental health and loneliness in Scottish schools: A multilevel analysis of data from the health behaviour in school-aged children study.

BACKGROUND: Adolescent loneliness and poor mental health represent dual public health concerns. Yet, associations between loneliness and mental health, and critically, how these associations vary in school settings are less understood. AIMS: Framed by social-ecological theory, we aimed to identify key predictors of adolescent mental health and examine school-level variation in the relationship between loneliness and mental health. SAMPLE: Cross-sectional data on adolescents from the 2018 wave of the Health Behaviour in School-aged Children study (HBSC) in Scotland were used (N = 5286). METHODS: Mental health was measured as a composite variable containing items assessing nervousness, irritability, sleep difficulties and feeling low. Loneliness was measured via a single item assessing how often adolescents felt 'left out'. Multilevel models were used to identify social-ecological predictors of mental health, associations with loneliness and between-school variation. RESULTS: Loneliness, as well as demographic, social and school factors, was found to be associated with mental health. Mental health varied across schools, with the between-school difference greater among adolescents with high levels of loneliness. Additionally, the negative effect of loneliness on mental health was stronger in schools with lower average mental health scores. CONCLUSIONS: The findings suggest that schools can play an important role in shaping adolescent mental health. Our study uniquely identifies that school-based interventions targeting mental health may be especially necessary among lonely adolescents, and programmes aimed at tackling loneliness may be more beneficial in schools with poorer mental health.