Characterizing eating disorder diagnosis and related outcomes by sexual orientation and gender identity in a national sample of college students

LGBTQ+ outpatients present to eating disorder treatment earlier and with more severe depressive symptoms than cisgender heterosexual peers

Community evidence indicates high eating disorder (ED) and comorbid symptom severity among LGBTQ+ compared to cisgender heterosexual (CH) individuals. Little is known about such disparities in ED treatment samples, especially in outpatient treatment. We aimed to descriptively characterize and investigate baseline group differences in symptom severity between LGBTQ+ and CH ED outpatients at treatment intake. Data from 60 (22.3%) LGBTQ+ and 209 (77.7%) CH ED outpatients were used to examine: (1) demographic and diagnostic differences; (2) differences in ED, depressive, and emotion dysregulation symptoms. Objectives were tested using Fisher-Freeman-Halton exact and independent samples t-tests, and analyses of covariance adjusted for age and diagnosis, respectively. Most LGBTQ+ outpatients were bisexual (55.2%), and 6.5% identified as transgender and non-binary. LGBTQ+ outpatients presented to treatment at younger ages (Mean Difference [MD] = -3.39, p = .016) and reported more severe depressive symptoms (MD = 5.73, p = .004) than CH patients, but endorsed similar ED symptom and emotion dysregulation severity. Groups did not differ in other demographic or diagnostic characteristics. LGBTQ+ individuals may develop more severe depression and similarly severe EDs at earlier ages but seek outpatient care sooner than CH peers. Managing depressive symptoms may be particularly important for LGBTQ+ ED patients.

Psychotherapy utilization by United States college students

Objective: We studied current psychotherapy utilization rates among college students with mental health problems and identified characteristics associated with differential utilization. Participants: Nationwide online survey of students screening positive for at least one clinical mental health problem (N = 18,435). Methods: Rates and correlates of psychotherapy utilization were analyzed descriptively and with logistic regression. Results: Sample-wide, 19% reported receiving psychotherapy. Being male (vs. female), being Asian, Black or African American, or Multiracial (vs. White), greater financial difficulty, lower parent education, lower year in school, and attending a public (vs. private) institution were associated with lower utilization. Holding a gender minority (vs. female) identity and holding a sexual minority (vs. heterosexual) identity were associated with higher utilization. Utilization fell from Fall 2019 to Spring 2020, early during the COVID-19 pandemic, and subsequently rebounded. Conclusions: This study estimates current psychotherapy utilization among students with mental health problems and identifies possibly underserved populations.

The current clinical approach to feeding and eating disorders aimed to increase personalization of management

Feeding and eating disorders (FEDs) are a heterogeneous grouping of disorders at the mind-body interface, with typical onset from childhood into emerging adulthood. They occur along a spectrum of disordered eating and compensatory weight management behaviors, and from low to high body weight. Psychiatric comorbidities are the norm. In contrast to other major psychiatric disorders, first-line treatments for FEDs are mainly psychological and/or nutrition-focused, with medications playing a minor adjunctive role. Patients, carers and clinicians all have identified personalization of treatment as a priority. Yet, for all FEDs, the evidence base supporting this personalization is limited. Importantly, disordered eating and related behaviors can have serious physical consequences and may put the patient's life at risk. In these cases, immediate safety and risk management considerations may at least for a period need to be prioritized over other efforts at personalization of care. This paper systematically reviews several key domains that may be relevant to the characterization of the individual patient with a FED aimed at personalization of management. These domains include symptom profile, clinical subtypes, severity, clinical staging, physical complications and consequences, antecedent and concomitant psychiatric conditions, social functioning and quality of life, neurocognition, social cognition and emotion, dysfunctional cognitive schemata, personality traits, family history, early environmental exposures, recent environmental exposures, stigma, and protective factors. Where possible, validated assessment measures for use in clinical practice are identified. The limitations of the current evidence are pointed out, and possible directions for future research are highlighted. These also include novel and emerging approaches aimed at providing more fine-grained and sophisticated ways to personalize treatment of FEDs, such as those that utilize neurobiological markers. We additionally outline remote measurement technologies designed to delineate patients' illness and recovery trajectories and facilitate development of novel intervention approaches.

The impact of gender-affirming interventions on eating disorder diagnosis risk among transgender and gender-diverse individuals

BACKGROUND

The objective of this study is to evaluate the risk of being diagnosed with an eating disorder among transgender and gender-diverse (TGD) individuals, specifically examining how this risk differs following gender-affirming medical therapy (GAMT).

METHODS

The study utilizes electronic medical record (EMR) data from the TriNetX database. A total of 90,955 TGD individuals were identified in the TriNetX database. TGD individuals were divided into cohorts according to gender-affirming interventions they received. To assess the risk of eating disorder diagnoses across groups, we applied a Cox proportional hazards model with gender-affirming care as a time-varying covariate.

RESULTS

Here we show that transfeminine individuals receiving hormone therapy (HT) have a significantly higher likelihood of being diagnosed with an eating disorder compared to those without intervention (HR:1.67, 95% CI:1.41, 1.98). Conversely, transmasculine individuals on HT exhibit a reduced risk of being diagnosed with an eating disorder relative to those without intervention (HR: 0.83, 95% CI: 0.76, 0.90).

CONCLUSIONS

After undergoing gender-affirming medical therapy, the risk of eating disorder diagnosis increases for transfeminine individuals and decreases for transmasculine individuals. The observed differences in risk between transfeminine and transmasculine individuals on GAMT may be attributed to factors such as gendered societal norms, variations in screening practices, and the physiological effects of hormone therapy on eating disorder symptomatology. Further research is needed to clarify these influences and support tailored interventions.

Investigating Eating Symptoms in the LGBTQIA+ Population: Do Discrimination and Adverse Conditions Matter?

BACKGROUND

Eating disorders (EDs) have traditionally been studied among heterosexual cisgender women, but recent research highlights a higher prevalence in LGBTQIA+ individuals.

AIMS

This study aims (1) to investigate the association between different groups based on gender identity and sexual orientation (GISO) and experiencing eating symptoms, and (2) to explore the extent to which self-perceived discrimination and adverse conditions explain this association.

METHODS

We administered an online survey to assess eating symptoms using the Eating Disorder Examination Questionnaire (EDE-Q 6.0) and measures of self-perceived discrimination and adverse conditions. Multistep logistic regressions were employed to analyze the associations between GISO and eating symptoms, initially unadjusted, then adjusted for sociodemographic variables, and finally adjusted for self-perceived discrimination and/or adverse conditions.

RESULTS

A total of 560 adults aged 30 ± 10.9 years old were included. After adjusting for socio-demographics all groups were more likely to experience eating symptoms compared to heterosexual men, with odds ratios (ORs) of 5.7 [95% CI: 1.3, 24.3] for cisgender heterosexual women, 6.7 [95% CI: 1.5, 29.8] for cisgender non-heterosexual women, and 9.3 [95% CI: 1.8, 47.5] for non-cisgender individuals. After adjusting for self-perceived discrimination and adverse conditions, the associations for women were attenuated, while the associations for non-cisgender individuals were no longer significant.

CONCLUSION

This study (1) confirms that sexual and gender minorities may be at higher risk for EDs, and (2) suggests that discrimination and adverse conditions may contribute to the higher prevalence of eating symptoms in this population. Additional research is needed to investigate these minority stressors as they may represent targets for effective interventions to prevent eating symptoms in the LGBTQIA+ community.

Californian Public University Students' Attitudes, Beliefs, and Barriers to Plant-Based Nutrition

Adopting a plant-based diet (PBD) has environmental sustainability benefits and has been shown to improve overall health and quality of life, yet for most people a diet shift towards a plant-based one remains a challenge, due to personal and environmental obstacles. Important independent decisions on self-care and nutritional habits occur in the first year of enrollment for college students. This cross-sectional quantitative study aims to examine the association between health beliefs, motivators, barriers, self-efficacy, and mental health status and following a more PBD in college students. A total of 449 Californian public university and junior college students completed an online survey. A stepwise multiple regression model was used to predict the level of intention to follow a PBD. Self-efficacy (β = 0.28, P < .001), motivators (β = 0.33, P < .001), and barriers (β = -0.19, P < .001) significantly predicted and accounted for 35% of the variance in intention to follow a PBD. The results reveal that greater self-efficacy, higher motivation, and fewer barriers predicted higher intention to follow a PBD. Beliefs did not add significantly to following a PBD.

Relationship between college lifestyle variables, eating disorder education, and eating disorder risk

Objective: This study examined relationships between eating disorder risk (EDR), lifestyle variables (e.g., exposure to healthy eating media), and differences among male and female college students. Participants: College students (N = 323) completed survey questionnaires (Fall, 2016). Fifty-three participants retook the survey at a later time. Methods: Participants completed a survey measuring EDR using EDI-3 subscales and 10 college lifestyle variables. Female and male EDR and Time 1 and Time 2 EDR were compared. Relationships between EDR and college life-style variables were examined. Results: Exercise, fewer daily meals, less face-to-face interactions, more digital interactions, less exposure to healthy eating media, and having conversations about body image were associated with EDR risk. Male college students showed an increase in EDR over time. Conclusions: Several lifestyle factors predicted EDR in college females and males. These lifestyle factors are modifiable and may be addressed by colleges during orientation and within the campus environment.

Eating disorder symptoms and comorbid mental health risk among teens recruited to a digital intervention research study via two online approaches

INTRODUCTION

It is crucial to identify and evaluate feasible, proactive ways to reach teens with eating disorders (EDs) who may not otherwise have access to screening or treatment. This study aimed to explore the feasibility of recruiting teens with EDs to a digital intervention study via social media and a publicly available online ED screen, and to compare the characteristics of teens recruited by each approach in an exploratory fashion.

METHOD

Teens aged 14-17 years old who screened positive for a clinical/subclinical ED or at risk for an ED and who were not currently in ED treatment completed a baseline survey to assess current ED symptoms, mental health comorbidities, and barriers to treatment. Bivariate analyses were conducted to examine differences between participants recruited via social media and those recruited after completion of a widely available online EDs screen (i.e., National Eating Disorders Association [NEDA] screen).

RESULTS

Recruitment of teens with EDs using the two online approaches was found to be feasible, with 934 screens completed and a total of 134 teens enrolled over 6 months: 77% (n = 103) via social media 23% (n = 31) via the NEDA screen. Mean age of participants (N = 134) was 16 years old, with 49% (n = 66) identifying as non-White, and 70% (n = 94) identifying as a gender and/or sexual minority. Teens from NEDA reported higher ED psychopathology scores (medium effect size) and more frequent self-induced vomiting and driven exercise (small effect sizes). Teens from NEDA also endorsed more barriers to treatment, including not feeling ready for treatment and not knowing where to find a counselor or other resources (small effect sizes).

DISCUSSION

Online recruitment approaches in this study reached a large number of teens with an interest in a digital intervention to support ED recovery, demonstrating the feasibility of these outreach methods. Both approaches reached teens with similar demographic characteristics; however, teens recruited from NEDA reported higher ED symptom severity and barriers to treatment. Findings suggest that proactive assessment and intervention methods should be developed and tailored to meet the needs of each of these groups.

PUBLIC SIGNIFICANCE

This study examined the feasibility of recruiting teens with EDs to a digital intervention research study via social media and NEDA's online screen, and demonstrated differences in ED symptoms among participants by recruitment approach.

Eating Disorders in Sexual and Gender Minority Adolescents

PURPOSE OF REVIEW

To consolidate recent literature addressing eating disorders and disordered eating behaviors among sexual and gender minority (SGM) adolescents, including but not limited to lesbian, gay, bisexual, transgender, and queer (LGBTQ) adolescents.

RECENT FINDINGS

Sexual and gender minority adolescents are at heightened vulnerability to eating disorders and disordered eating behaviors compared to their cisgender and heterosexual peers, potentially due to minority stress, gender norms, objectification, and the influence of the media, peers, and parents. We report findings from recent literature on the epidemiology and prevalence, assessment, mental health comorbidity, quality of life and psychosocial functioning, risk and protective factors, and treatment and interventions for eating disorders in sexual and gender minority adolescents. Addressing eating disorders in sexual and gender minority adolescents requires an integrated approach consisting of screening, tailored treatment, and comprehensive support to address intersectional challenges. Gender-affirming and trauma-informed care approaches may be considered.

Problem Gambling and Sexual Minority Individuals: Evaluating Influence of Age and Comorbid Mental Health and Substance Use Problems

Little is known about the prevalence of problem gambling among sexual minority individuals. The present study utilized an epidemiological sample, including individuals identifying as lesbian, gay, bisexual, asexual, and pansexual, to explore gambling behavior and problems and associated mental health and comorbid conditions that may contribute to elevated risk. Bivariate comparisons found that sexual minority individuals had higher rates of problem gambling, alcohol and substance use problems, anxiety, depression, and a wide range of problem behaviors (e.g., binge eating, prostitution, excessive video gaming) than heterosexuals. In a logistic regression, age moderated the relationship between sexual minority status and problem gambling, such that the risk for high-risk problem gambling increased with age for sexual minority individuals while it decreased for heterosexuals. Additionally, a logistic regression of sexual minority individuals who gamble found anxiety (OR = 3.80, 95% CI = 1.03, 13.97) and drug problems (OR = 8.57, 95% CI = 1.79, 41.05) predicted high-risk problem gambling. Findings suggest that prevention and screening protocols are needed in systems accessed by sexual minority individuals, particularly those middle age and older, as well as in settings where anxiety and substance use disorders are treated.

Intersectionality of demographic characteristics in self-reported anorexia nervosa, bulimia nervosa, and probable eating disorders among college students

OBJECTIVE

To investigate associations between identity intersectionality, with a primary focus on minority identity, and probable eating disorders (EDs) within the US college student population.

METHOD

Data consisting of n = 414,299 college students' responses to the American College Health Association's National College Health Assessment between fall 2015 and spring 2019 were utilized for this study. Overall and stratified adjusted odds ratios (aORs) were used to assess the association between different facets of identity (i.e., race/ethnicity, gender identity, and sexual orientation) and probable EDs.

RESULTS

Among all, in our analytic sample, 7.15% reported a probable ED. Interactions between all three identity variables were significant, and thus stratified odds ratios were evaluated. Transgender men were significantly more likely to report probable ED than cisgender male peers within the following racial/ethnic groups: non-Hispanic White (aOR: 3.33; 95% CI: 2.79, 3.96; p < .0001), non-Hispanic Black (aOR: 3.29; 95% CI: 1.72, 6.28; p = .0003), Hispanic (aOR: 2.31; 95% CI: 1.55, 3.43; p < .0001), Asian or Pacific Islander (aOR: 2.19; 95% CI: 1.45, 3.30; p = .0002), Biracial or Multicultural (aOR: 3.36; 95% CI: 2.17, 5.22; p < .0001), and other (aOR: 4.19; 95% CI: 2.25, 7.79; p < .0001).

CONCLUSIONS

This study underscores the importance of increasing our understanding of interactions between marginalized identities and the ways in which minority identity informs ED risk.

PUBLIC SIGNIFICANCE

The impact of multiple marginalized identities on ED outcomes is not well understood. Our study expands on previous ACHA-NCHA studies by addressing identity intersectionality, looking at more than one identity at a time (i.e., specifically race/ethnicity, gender identity, and sexual orientation). Our results contribute unique risk profiles for students who identify with multiple marginalized groups. Further, they indicate that that these associations vary based on the compounded effect of the demographic factors considered.

A scoping review of research literature on eating and body image for transgender and nonbinary youth

BACKGROUND

Transgender and nonbinary (TGNB) adolescents and young adults are underrepresented in the literature on eating disorders and body image-related problems, despite increased mental health disparities and emerging research showing high associations between gender dysphoria, body image, and eating disorders among TGNB youth.

AIMS

The scoping review was designed to critically examine the research on TGNB adolescents and young adults who experience eating and body image related problems as well as clinical studies on treatment approaches and effectiveness.

METHOD

Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) was used for reporting this scoping review. The electronic databases of MEDLINE and PsychInfo were used for searching subject terms. Inclusion criteria for studies required the quantitative measurement or qualitative exploration of body image or eating for transgender minor children, adolescents, or young adult samples (18 to 25 years old) and address differences in eating/body-related problems by age. The relevant data was extracted and narratively summarized.

RESULTS

49 studies were identified, data extracted, and analyzed. Increased prevalence of eating disorders and body image problems were identified for TGNB youth. Body-gender congruence through gender affirming social and medical interventions (e.g., hormone therapy) were noted as significant for alleviating body image problems and facilitating eating disorder treatment. Family and social factors were not well understood in the literature and a need for increased study of TGNB youth from varied racial/ethnic, neurodiverse, and within specific identities (e.g., nonbinary) and families and cultural contexts is still needed.

CONCLUSIONS

Future research should consider the use of developmental and family theories for guiding inclusion of salient social factors influencing eating patterns, body image, and treatment outcomes. In addition, more studies are needed with those from minoritized racial and ethnic groups, neurodiversity, and varied gender identities (e.g., nonbinary and gender queer) for identifying important differences.

Depression and anxiety among college students at Historically Black and Predominantly White universities during the COVID-19 pandemic: A cross-sectional study

OBJECTIVE

To assess depression and anxiety among college students during the COVID-19 pandemic and its association with race.

PARTICIPANTS

Using a cross-sectional survey, depression and anxiety among college students at a Predominantly White (PWU) and a Historically Black University (HBU) during 2021 were evaluated.

METHODS

The patient health questionnaire-9 (PHQ-9), general anxiety disorder-7 (GAD-7), and self-reported sociodemographic characteristics were collected. Chi-square and logistic regression tests examined differences in depression and anxiety based on race.

RESULTS

Depression and anxiety among 3,102 students (87% female) were analyzed. Minority racial groups were associated with anxiety (p < 0.01) but not depression in the PWU. Moderately severe and severe depression was higher among the minority race at both the universities (1.76% compared to 0.53% at PWU, and 11.1% compared to 2.4% at HBU).

CONCLUSIONS

Depression and anxiety among college students is influenced by racial status. First-generation students were more likely to report depression in both HBU and PWU.

Eating disorder outcomes: findings from a rapid review of over a decade of research

BACKGROUND

Eating disorders (ED), especially Anorexia Nervosa (AN), are internationally reported to have amongst the highest mortality and suicide rates in mental health. With limited evidence for current pharmacological and/or psychological treatments, there is a grave responsibility within health research to better understand outcomes for people with a lived experience of ED, factors and interventions that may reduce the detrimental impact of illness and to optimise recovery. This paper aims to synthesise the literature on outcomes for people with ED, including rates of remission, recovery and relapse, diagnostic crossover, and mortality.

METHODS

This paper forms part of a Rapid Review series scoping the evidence for the field of ED, conducted to inform the Australian National Eating Disorders Research and Translation Strategy 2021-2031, funded and released by the Australian Government. ScienceDirect, PubMed and Ovid/MEDLINE were searched for studies published between 2009 and 2022 in English. High-level evidence such as meta-analyses, large population studies and Randomised Controlled Trials were prioritised through purposive sampling. Data from selected studies relating to outcomes for people with ED were synthesised and are disseminated in the current review.

RESULTS

Of the over 1320 studies included in the Rapid Review, the proportion of articles focused on outcomes in ED was relatively small, under 9%. Most evidence was focused on the diagnostic categories of AN, Bulimia Nervosa and Binge Eating Disorder, with limited outcome studies in other ED diagnostic groups. Factors such as age at presentation, gender, quality of life, the presence of co-occurring psychiatric and/or medical conditions, engagement in treatment and access to relapse prevention programs were associated with outcomes across diagnoses, including mortality rates.

CONCLUSION

Results are difficult to interpret due to inconsistent study definitions of remission, recovery and relapse, lack of longer-term follow-up and the potential for diagnostic crossover. Overall, there is evidence of low rates of remission and high risk of mortality, despite evidence-based treatments, especially for AN. It is strongly recommended that research in long-term outcomes, and the factors that influence better outcomes, using more consistent variables and methodologies, is prioritised for people with ED.

Gender and sex in eating disorders: A narrative review of the current state of knowledge, research gaps, and recommendations

INTRODUCTION

Eating disorders (EDs) have long been considered conditions exclusively affecting women, and studies in the ED field regularly exclude men. Research efforts are needed to better understand the role of gender and sex in EDs. This review describes the role of gender and sex in the development of EDs from a biopsychosocial perspective.

METHODS

The primary hypothesis of this narrative review is that gender and sex interact to influence ED risk. The literature review was conducted using the PubMed database.

RESULTS

This review first presents the general characteristics and prevalence of EDs according to gender and sex. Next, neurodevelopmental processes, neurobiology, gender roles, body image, and the minority stress model are addressed. Lastly, research perspectives to better include gender and sex in the field of EDs are discussed (e.g., representation of gender and sex diversities, development of appropriate assessment tools, and increasing awareness).

CONCLUSION

Although substantial knowledge gaps remain, there is a growing recognition of the importance of integrating gender and sex in ED research that holds promise for further development in the field.

Effects of single plant-based vs. animal-based meals on satiety and mood in real-world smartphone-embedded studies

Adopting plant-based diets high in fiber may reduce global warming and obesity prevalence. Physiological and psychological determinants of plant-based food intake remain unclear. As fiber has been linked with improved gut-brain signaling, we hypothesized that a single plant-based (vegetarian and vegan) compared to an animal-based (animal flesh) meal, would induce higher satiety, higher mood and less stress. In three large-scale smartphone-based studies, adults (nall = 16,379) ranked satiety and mood before and after meal intake. Meal intake induced satiety and higher mood. Plant-based meal choices did not explain differences in post-meal hunger. Individuals choosing a plant-based meal reported slightly higher mood before and smaller mood increases after the meal compared to those choosing animal-based meals. Protein content marginally mediated post-meal satiety, while gender and taste ratings had a strong effect on satiety and mood in general. We could not detect the profound effects of plant-based vs. animal-based meals on satiety and mood.

Worldwide prevalence of DSM-5 eating disorders among young people

PURPOSE OF REVIEW

Eating disorders (anorexia nervosa, bulimia nervosa, binge eating disorder, and other eating disorders) affect young people worldwide. This narrative review summarizes key studies conducted on the prevalence of Diagnostic and Statistical Manual of Mental Disorders (DSM-5) eating disorders among young people in 2013-22.

RECENT FINDINGS

In Western settings, a substantial proportion of young people have reported an eating disorder. Overall, 5.5--17.9% of young women and 0.6-2.4% of young men have experienced a DSM-5 eating disorder by early adulthood. Lifetime DSM-5 anorexia nervosa was reported by 0.8-6.3% of women and 0.1-0.3% of men, bulimia nervosa by 0.8-2.6% of women and 0.1-0.2% of men, binge eating disorder by 0.6-6.1% of women and 0.3-0.7% of men, other specified feeding or eating disorders by 0.6-11.5% of women and 0.2-0.3% of men, and unspecified feeding or eating disorders 0.2-4.7% of women and 0-1.6% of men. Gender and sexual minorities were at particularly high risk. Emerging studies from Eastern Europe, Asia, and Latin America show similar high prevalences. During the COVID-19 pandemic, the incidence of eating disorders has still increased.

SUMMARY

Eating disorders are a global health concern among young people. Improved detection, management, and prevention methods are urgently needed.

Predictors of treatment seeking and uptake among respondents to a widely disseminated online eating disorders screen in the United States

OBJECTIVE

To explore predictors of treatment seeking and uptake among individuals following an online eating disorders (EDs) screen in the U.S. disseminated by the National Eating Disorders Association.

METHOD

Respondents who screened at risk or positive for a probable ED from 04/2019 to 05/2021 (N = 263,530) were eligible to complete a 2-month follow-up survey that assessed treatment seeking and uptake after being offered referral options following screening. Analyses were conducted using chi-square tests or logistic regressions.

RESULTS

Sixty thousand thirty-four respondents (22.8%) opted-in to the follow-up survey, of whom 2276 (3.8%) completed it. Of the final analytic sample (n = 1922), 35.7% of respondents reported seeking and 22.4% reported receiving treatment. Treatment seeking and uptake were more common among respondents who were female, White, or >24 years of age; uptake was more common among respondents who were non-Hispanic or higher income. Elevated shape/weight concerns were significantly, albeit modestly, associated with reduced likelihood to receive treatment.

DISCUSSION

Demographic differences in treatment seeking and uptake highlight the need to optimize ED screening tools/feedback to meet the needs of underserved groups and to address stereotypes and structural barriers that may interfere. Research is also needed to identify barriers to uptake among those with elevated shape/weight concerns.

PUBLIC SIGNIFICANCE

Relatively low rates of treatment seeking and uptake were observed, particularly among underserved groups, 2 months following a widely disseminated online eating disorders screen. Optimization of online eating disorder screening tools and delivery of feedback and referral information may be needed to increase health care utilization.