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Department/Unit:Child and Adolescent Psychiatry

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Relationship Between Mental Health and HIV Transmission Knowledge and Prevention Attitudes Among Adolescents Living with HIV: Lessons from Suubi + Adherence Cluster Randomized Study in Southern Uganda

Byansi, William; Brathwaite, Rachel; Calvert, Madison; Nabunya, Proscovia; Sensoy Bahar, Ozge; Damulira, Christopher; Namuwonge, Flavia; McKay, Mary M; Mellins, Claude A; Ssewamala, Fred M
We assessed the effect of depression, hopelessness, and self-concept on HIV prevention attitudes and knowledge about infection, transmission and sexual risk behavior among adolescents living with HIV in Uganda. Utilizing longitudinal data from 635 adolescents living with HIV, multiple ordinary least square regression was used to evaluate associations between the three indicators of mental health functioning at baseline and HIV knowledge and prevention attitudes at 12-months follow-up. We found that depression (β = - 0.17; 95% CI - 0.31, - 0.04) and hopelessness (β = - 0.16; 95% CI - 0.28, - 0.04) scores at baseline were associated with a 0.17 and 0.16 average reduction in HIV prevention attitudes and HIV knowledge scores, respectively at 12-months follow-up. However, self-concept was not significantly associated with HIV knowledge or prevention attitudes. Adolescents living with HIV with greater levels of hopelessness are at increased risk of having limited HIV knowledge while those with greater symptoms of depression had less favorable HIV prevention attitudes.
PMID: 33797667
ISSN: 1573-3254
CID: 4838482

Prospective individual patient data meta-analysis: Evaluating convalescent plasma for COVID-19

Goldfeld, Keith S; Wu, Danni; Tarpey, Thaddeus; Liu, Mengling; Wu, Yinxiang; Troxel, Andrea B; Petkova, Eva
As the world faced the devastation of the COVID-19 pandemic in late 2019 and early 2020, numerous clinical trials were initiated in many locations in an effort to establish the efficacy (or lack thereof) of potential treatments. As the pandemic has been shifting locations rapidly, individual studies have been at risk of failing to meet recruitment targets because of declining numbers of eligible patients with COVID-19 encountered at participating sites. It has become clear that it might take several more COVID-19 surges at the same location to achieve full enrollment and to find answers about what treatments are effective for this disease. This paper proposes an innovative approach for pooling patient-level data from multiple ongoing randomized clinical trials (RCTs) that have not been configured as a network of sites. We present the statistical analysis plan of a prospective individual patient data (IPD) meta-analysis (MA) from ongoing RCTs of convalescent plasma (CP). We employ an adaptive Bayesian approach for continuously monitoring the accumulating pooled data via posterior probabilities for safety, efficacy, and harm. Although we focus on RCTs for CP and address specific challenges related to CP treatment for COVID-19, the proposed framework is generally applicable to pooling data from RCTs for other therapies and disease settings in order to find answers in weeks or months, rather than years.
PMID: 34164838
ISSN: 1097-0258
CID: 4918612

The management of ADHD in children and adolescents: bringing evidence to the clinic: perspective from the European ADHD Guidelines Group (EAGG)

Coghill, David; Banaschewski, Tobias; Cortese, Samuele; Asherson, Philip; Brandeis, Daniel; Buitelaar, Jan; Daley, David; Danckaerts, Marina; Dittmann, Ralf W; Doepfner, Manfred; Ferrin, Maite; Hollis, Chris; Holtmann, Martin; Paramala, Santosh; Sonuga-Barke, Edmund; Soutullo, César; Steinhausen, Hans-Christoph; Van der Oord, Saskia; Wong, Ian C K; Zuddas, Alessandro; Simonoff, Emily
ADHD is the most common neurodevelopmental disorder presenting to child and adolescent mental health, paediatric, and primary care services. Timely and effective interventions to address core ADHD symptoms and co-occurring problems are a high priority for healthcare and society more widely. While much research has reported on the benefits and adverse effects of different interventions for ADHD, these individual research reports and the reviews, meta-analyses and guidelines summarizing their findings are sometimes inconsistent and difficult to interpret. We have summarized the current evidence and identified several methodological issues and gaps in the current evidence that we believe are important for clinicians to consider when evaluating the evidence and making treatment decisions. These include understanding potential impact of bias such as inadequate blinding and selection bias on study outcomes; the relative lack of high-quality data comparing different treatments and assessing long-term effectiveness, adverse effects and safety for both pharmacological and non-pharmacological treatments; and the problems associated with observational studies, including those based on large national registries and comparing treatments with each other. We highlight key similarities across current international clinical guidelines and discuss the reasons for divergence where these occur. We discuss the integration of these different perspective into a framework for person/family-centered evidence-based practice approach to care that aims to achieve optimal outcomes that prioritize individual strengths and impairments, as well as the personal treatment targets of children and their families. Finally, we consider how access to care for this common and impairing disorder can be improved in different healthcare systems.
PMCID:8532460
PMID: 34677682
ISSN: 1435-165x
CID: 5068192

Internet Search Activity of Young People With Mood Disorders Who Are Hospitalized for Suicidal Thoughts and Behaviors: Qualitative Study of Google Search Activity

Moon, Khatiya C; Van Meter, Anna R; Kirschenbaum, Michael A; Ali, Asra; Kane, John M; Birnbaum, Michael L
BACKGROUND:Little is known about the internet search activity of people with suicidal thoughts and behaviors (STBs). This data source has the potential to inform both clinical and public health efforts, such as suicide risk assessment and prevention. OBJECTIVE:We aimed to evaluate the internet search activity of suicidal young people to find evidence of suicidal ideation and behavioral health-related content. METHODS:Individuals aged between 15 and 30 years (N=43) with mood disorders who were hospitalized for STBs provided access to their internet search history. Searches that were conducted in the 3-month period prior to hospitalization were extracted and manually evaluated for search themes related to suicide and behavioral health. RESULTS:A majority (27/43, 63%) of participants conducted suicide-related searches. Participants searched for information that exactly matched their planned or chosen method of attempting suicide in 21% (9/43) of cases. Suicide-related search queries also included unusual suicide methods and references to suicide in popular culture. A majority of participants (33/43, 77%) had queries related to help-seeking themes, including how to find inpatient and outpatient behavioral health care. Queries related to mood and anxiety symptoms were found among 44% (19/43) of participants and included references to panic disorder, the inability to focus, feelings of loneliness, and despair. Queries related to substance use were found among 44% (19/43) of participants. Queries related to traumatic experiences were present among 33% (14/43) of participants. Few participants conducted searches for crisis hotlines (n=3). CONCLUSIONS:Individuals search the internet for information related to suicide prior to hospitalization for STBs. The improved understanding of the search activity of suicidal people could inform outreach, assessment, and intervention strategies for people at risk. Access to search data may also benefit the ongoing care of suicidal patients.
PMCID:8571684
PMID: 34677139
ISSN: 2368-7959
CID: 5323442

The human olfactory bulb processes odor valence representation and cues motor avoidance behavior

Iravani, Behzad; Schaefer, Martin; Wilson, Donald A; Arshamian, Artin; Lundström, Johan N
Determining the valence of an odor to guide rapid approach-avoidance behavior is thought to be one of the core tasks of the olfactory system, and yet little is known of the initial neural mechanisms supporting this process or of its subsequent behavioral manifestation in humans. In two experiments, we measured the functional processing of odor valence perception in the human olfactory bulb (OB)-the first processing stage of the olfactory system-using a noninvasive method as well as assessed the subsequent motor avoidance response. We demonstrate that odor valence perception is associated with both gamma and beta activity in the human OB. Moreover, we show that negative, but not positive, odors initiate an early beta response in the OB, a response that is linked to a preparatory neural motor response in the motor cortex. Finally, in a separate experiment, we show that negative odors trigger a full-body motor avoidance response, manifested as a rapid leaning away from the odor, within the time period predicted by the OB results. Taken together, these results demonstrate that the human OB processes odor valence in a sequential manner in both the gamma and beta frequency bands and suggest that rapid processing of unpleasant odors in the OB might underlie rapid approach-avoidance decisions.
PMCID:8545486
PMID: 34645711
ISSN: 1091-6490
CID: 5061982

Evaluation of a Modified Bit Device to Obtain Saliva Samples from Horses

Vincent, Aviva; Peth-Pierce, Robin Marie; Morrissey, Meghan A; Acri, Mary C; Guo, Fei; Seibel, Lauren; Hoagwood, Kimberly E
(1) Background: Accounting for the well-being of equine partners is a responsibility of those engaged in Equine-Assisted Services (EAS). Researchers took heed of this call to action by developing an innovative way to collect data to assess the physiological indicators of stress in equine participants. The collection of saliva is considered to be a minimally invasive method of data collection and is typically performed using a cotton swab; however, in equines, the introduction of a foreign object may induce stress; (2) Methods: Researchers used a modified bit to collect pooled saliva in an effort to further reduce stress during the saliva collection process. Additionally, the collection of pooled saliva, via the bit, increases the opportunity to consider additional analyses, such as oxytocin, which is more reliable in pooled saliva than site-specific saliva captured with a swab; (3) Results: A data analysis demonstrated that ample saliva was captured using the modified bit. Observational data supported that the horses demonstrated fewer physical stress signals to the bit than to the swab. Thus, the modified bit is a feasible and valid method for equine salivary sample collection; (4) Conclusions: The results suggest that the modified bit provides a viable method to collect equine saliva and supports national calls to prioritize animal welfare analysis, specifically for horses used within EAS. Future research should enhance methodological rigor, including in the process and timing, thereby contributing to the bit's validation.
PMCID:8538290
PMID: 34679064
ISSN: 2306-7381
CID: 5045922

Intranasal Oxytocin in Children and Adolescents with Autism Spectrum Disorder

Sikich, Linmarie; Kolevzon, Alexander; King, Bryan H; McDougle, Christopher J; Sanders, Kevin B; Kim, Soo-Jeong; Spanos, Marina; Chandrasekhar, Tara; Trelles, M D Pilar; Rockhill, Carol M; Palumbo, Michelle L; Witters Cundiff, Allyson; Montgomery, Alicia; Siper, Paige; Minjarez, Mendy; Nowinski, Lisa A; Marler, Sarah; Shuffrey, Lauren C; Alderman, Cheryl; Weissman, Jordana; Zappone, Brooke; Mullett, Jennifer E; Crosson, Hope; Hong, Natalie; Siecinski, Stephen K; Giamberardino, Stephanie N; Luo, Sheng; She, Lilin; Bhapkar, Manjushri; Dean, Russell; Scheer, Abby; Johnson, Jacqueline L; Gregory, Simon G; Veenstra-VanderWeele, Jeremy
BACKGROUND:Experimental studies and small clinical trials have suggested that treatment with intranasal oxytocin may reduce social impairment in persons with autism spectrum disorder. Oxytocin has been administered in clinical practice to many children with autism spectrum disorder. METHODS:We conducted a 24-week, placebo-controlled phase 2 trial of intranasal oxytocin therapy in children and adolescents 3 to 17 years of age with autism spectrum disorder. Participants were randomly assigned in a 1:1 ratio, with stratification according to age and verbal fluency, to receive oxytocin or placebo, administered intranasally, with a total target dose of 48 international units daily. The primary outcome was the least-squares mean change from baseline on the Aberrant Behavior Checklist modified Social Withdrawal subscale (ABC-mSW), which includes 13 items (scores range from 0 to 39, with higher scores indicating less social interaction). Secondary outcomes included two additional measures of social function and an abbreviated measure of IQ. RESULTS:Of the 355 children and adolescents who underwent screening, 290 were enrolled. A total of 146 participants were assigned to the oxytocin group and 144 to the placebo group; 139 and 138 participants, respectively, completed both the baseline and at least one postbaseline ABC-mSW assessments and were included in the modified intention-to-treat analyses. The least-squares mean change from baseline in the ABC-mSW score (primary outcome) was -3.7 in the oxytocin group and -3.5 in the placebo group (least-squares mean difference, -0.2; 95% confidence interval, -1.5 to 1.0; P = 0.61). Secondary outcomes generally did not differ between the trial groups. The incidence and severity of adverse events were similar in the two groups. CONCLUSIONS:This placebo-controlled trial of intranasal oxytocin therapy in children and adolescents with autism spectrum disorder showed no significant between-group differences in the least-squares mean change from baseline on measures of social or cognitive functioning over a period of 24 weeks. (Funded by the National Institute of Child Health and Human Development; SOARS-B ClinicalTrials.gov number, NCT01944046.).
PMID: 34644471
ISSN: 1533-4406
CID: 5340542

Headache in ADHD as comorbidity and a side effect of medications: a systematic review and meta-analysis

Pan, Pei-Yin; Jonsson, Ulf; ÅžahpazoÄŸlu Çakmak, Sabriye Selin; Häge, Alexander; Hohmann, Sarah; Nobel Norrman, Hjalmar; Buitelaar, Jan K; Banaschewski, Tobias; Cortese, Samuele; Coghill, David; Bölte, Sven
There is mixed evidence on the association between headache and attention-deficit/hyperactivity disorder (ADHD), as well as headache and ADHD medications. This systematic review and meta-analysis investigated the co-occurrence of headache in children with ADHD, and the effects of ADHD medications on headache. Embase, Medline and PsycInfo were searched for population-based and clinical studies comparing the prevalence of headache in ADHD and controls through January 26, 2021. In addition, we updated the search of a previous systematic review and network meta-analysis of double-blind randomized controlled trials (RCTs) on ADHD medications on June 16, 2020. Trials of amphetamines, atomoxetine, bupropion, clonidine, guanfacine, methylphenidate, and modafinil with a placebo arm and reporting data on headache as an adverse event, were included. Thirteen epidemiological studies and 58 clinical trials were eligible for inclusion. In epidemiological studies, a significant association between headache and ADHD was found [odds ratio (OR) = 2.01, 95% confidence interval (CI) = 1.63-2.46], which remained significant when limited to studies reporting ORs adjusted for possible confounders. The pooled prevalence of headaches in children with ADHD was 26.6%. In RCTs, three ADHD medications were associated with increased headache during treatment periods, compared to placebo: atomoxetine (OR = 1.29, 95% CI = 1.06-1.56), guanfacine (OR = 1.43, 95% CI = 1.12-1.82), and methylphenidate (OR = 1.33, 95% CI = 1.09-1.63). The summarized evidence suggests that headache is common in children with ADHD, both as part of the clinical presentation as such and as a side effect of some standard medications. Monitoring and clinical management strategies of headache in ADHD, in general, and during pharmacological treatment are recommended.
PMID: 34635194
ISSN: 1469-8978
CID: 5091852

Physical and mental health impact of COVID-19 on children, adolescents, and their families: The Collaborative Outcomes study on Health and Functioning during Infection Times - Children and Adolescents (COH-FIT-C&A)

Solmi, Marco; Estradé, Andrés; Thompson, Trevor; Agorastos, Agorastos; Radua, Joaquim; Cortese, Samuele; Dragioti, Elena; Leisch, Friedrich; Vancampfort, Davy; Thygesen, Lau Caspar; Aschauer, Harald; Schloegelhofer, Monika; Akimova, Elena; Schneeberger, Andres; Huber, Christian G; Hasler, Gregor; Conus, Philippe; Cuénod, Kim Q Do; von Känel, Roland; Arrondo, Gonzalo; Fusar-Poli, Paolo; Gorwood, Philip; Llorca, Pierre-Michel; Krebs, Marie-Odile; Scanferla, Elisabetta; Kishimoto, Taishiro; Rabbani, Golam; Skonieczna-Å»ydecka, Karolina; Brambilla, Paolo; Favaro, Angela; Takamiya, Akihiro; Zoccante, Leonardo; Colizzi, Marco; Bourgin, Julie; KamiÅ„ski, Karol; Moghadasin, Maryam; Seedat, Soraya; Matthews, Evan; Wells, John; Vassilopoulou, Emilia; Gadelha, Ary; Su, Kuan-Pin; Kwon, Jun Soo; Kim, Minah; Lee, Tae Young; Papsuev, Oleg; Manková, Denisa; Boscutti, Andrea; Gerunda, Cristiano; Saccon, Diego; Righi, Elena; Monaco, Francesco; Croatto, Giovanni; Cereda, Guido; Demurtas, Jacopo; Brondino, Natascia; Veronese, Nicola; Enrico, Paolo; Politi, Pierluigi; Ciappolino, Valentina; Pfennig, Andrea; Bechdolf, Andreas; Meyer-Lindenberg, Andreas; Kahl, Kai G; Domschke, Katharina; Bauer, Michael; Koutsouleris, Nikolaos; Winter, Sibylle; Borgwardt, Stefan; Bitter, Istvan; Balazs, Judit; Czobor, Pal; Unoka, Zsolt; Mavridis, Dimitris; Tsamakis, Konstantinos; Bozikas, Vasilios P; Tunvirachaisakul, Chavit; Maes, Michael; Rungnirundorn, Teerayuth; Supasitthumrong, Thitiporn; Haque, Ariful; Brunoni, Andre R; Costardi, Carlos Gustavo; Schuch, Felipe Barreto; Polanczyk, Guilherme; Luiz, Jhoanne Merlyn; Fonseca, Lais; Aparicio, Luana V; Valvassori, Samira S; Nordentoft, Merete; Vendsborg, Per; Hoffmann, Sofie Have; Sehli, Jihed; Sartorius, Norman; Heuss, Sabina; Guinart, Daniel; Hamilton, Jane; Kane, John; Rubio, Jose; Sand, Michael; Koyanagi, Ai; Solanes, Aleix; Andreu-Bernabeu, Alvaro; Cáceres, Antonia San José; Arango, Celso; Díaz-Caneja, Covadonga M; Hidalgo-Mazzei, Diego; Vieta, Eduard; Gonzalez-Peñas, Javier; Fortea, Lydia; Parellada, Mara; Fullana, Miquel A; Verdolini, Norma; Fárková, Eva; Janků, Karolina; Millan, Mark; Honciuc, Mihaela; Moniuszko-Malinowska, Anna; Łoniewski, Igor; Samochowiec, Jerzy; Kiszkiel, Łukasz; Marlicz, Maria; Sowa, PaweÅ‚; Marlicz, Wojciech; Spies, Georgina; Stubbs, Brendon; Firth, Joseph; Sullivan, Sarah; Darcin, Asli Enez; Aksu, Hatice; Dilbaz, Nesrin; Noyan, Onur; Kitazawa, Momoko; Kurokawa, Shunya; Tazawa, Yuki; Anselmi, Alejandro; Cracco, Cecilia; Machado, Ana Inés; Estrade, Natalia; De Leo, Diego; Curtis, Jackie; Berk, Michael; Ward, Philip; Teasdale, Scott; Rosenbaum, Simon; Marx, Wolfgang; Horodnic, Adrian Vasile; Oprea, Liviu; Alexinschi, Ovidiu; Ifteni, Petru; Turliuc, Serban; Ciuhodaru, Tudor; Bolos, Alexandra; Matei, Valentin; Nieman, Dorien H; Sommer, Iris; van Os, Jim; van Amelsvoort, Therese; Sun, Ching-Fang; Guu, Ta-Wei; Jiao, Can; Zhang, Jieting; Fan, Jialin; Zou, Liye; Yu, Xin; Chi, Xinli; de Timary, Philippe; van Winke, Ruud; Ng, Bernardo; Pena, Edilberto; Arellano, Ramon; Roman, Raquel; Sanchez, Thelma; Movina, Larisa; Morgado, Pedro; Brissos, Sofia; Aizberg, Oleg; Mosina, Anna; Krinitski, Damir; Mugisha, James; Sadeghi-Bahmani, Dena; Sadeghi, Masoud; Hadi, Samira; Brand, Serge; Errazuriz, Antonia; Crossley, Nicolas; Ristic, Dragana Ignjatovic; López-Jaramillo, Carlos; Efthymiou, Dimitris; Kuttichira, Praveenlal; Kallivayalil, Roy Abraham; Javed, Afzal; Afridi, Muhammad Iqbal; James, Bawo; Seb-Akahomen, Omonefe Joy; Fiedorowicz, Jess; Carvalho, Andre F; Daskalakis, Jeff; Yatham, Lakshmi N; Yang, Lin; Okasha, Tarek; Dahdouh, Aïcha; Gerdle, Björn; Tiihonen, Jari; Shin, Jae Il; Lee, Jinhee; Mhalla, Ahmed; Gaha, Lotfi; Brahim, Takoua; Altynbekov, Kuanysh; Negay, Nikolay; Nurmagambetova, Saltanat; Jamei, Yasser Abu; Weiser, Mark; Correll, Christoph U
BACKGROUND:The COVID-19 pandemic has altered daily routines and family functioning, led to closing schools, and dramatically limited social interactions worldwide. Measuring its impact on mental health of vulnerable children and adolescents is crucial. METHODS:The Collaborative Outcomes study on Health and Functioning during Infection Times (COH-FIT - www.coh-fit.com) is an on-line anonymous survey, available in 30 languages, involving >230 investigators from 49 countries supported by national/international professional associations. COH-FIT has thee waves (until the pandemic is declared over by the WHO, and 6-18 months plus 24-36 months after its end). In addition to adults, COH-FIT also includes adolescents (age 14-17 years), and children (age 6-13 years), recruited via non-probability/snowball and representative sampling and assessed via self-rating and parental rating. Non-modifiable/modifiable risk factors/treatment targets to inform prevention/intervention programs to promote health and prevent mental and physical illness in children and adolescents will be generated by COH-FIT. Co-primary outcomes are changes in well-being (WHO-5) and a composite psychopathology P-Score. Multiple behavioral, family, coping strategy and service utilization factors are also assessed, including functioning and quality of life. RESULTS:Up to June 2021, over 13,000 children and adolescents from 59 countries have participated in the COH-FIT project, with representative samples from eleven countries. LIMITATIONS/CONCLUSIONS:Cross-sectional and anonymous design. CONCLUSIONS:Evidence generated by COH-FIT will provide an international estimate of the COVID-19 effect on children's, adolescents' and families', mental and physical health, well-being, functioning and quality of life, informing the formulation of present and future evidence-based interventions and policies to minimize adverse effects of the present and future pandemics on youth.
PMCID:8486586
PMID: 34606810
ISSN: 1573-2517
CID: 5099492

Cortical and subcortical brain structure in generalized anxiety disorder: findings from 28 research sites in the ENIGMA-Anxiety Working Group

Harrewijn, Anita; Cardinale, Elise M; Groenewold, Nynke A; Bas-Hoogendam, Janna Marie; Aghajani, Moji; Hilbert, Kevin; Cardoner, Narcis; Porta-Casteràs, Daniel; Gosnell, Savannah; Salas, Ramiro; Jackowski, Andrea P; Pan, Pedro M; Salum, Giovanni A; Blair, Karina S; Blair, James R; Hammoud, Mira Z; Milad, Mohammed R; Burkhouse, Katie L; Phan, K Luan; Schroeder, Heidi K; Strawn, Jeffrey R; Beesdo-Baum, Katja; Jahanshad, Neda; Thomopoulos, Sophia I; Buckner, Randy; Nielsen, Jared A; Smoller, Jordan W; Soares, Jair C; Mwangi, Benson; Wu, Mon-Ju; Zunta-Soares, Giovana B; Assaf, Michal; Diefenbach, Gretchen J; Brambilla, Paolo; Maggioni, Eleonora; Hofmann, David; Straube, Thomas; Andreescu, Carmen; Berta, Rachel; Tamburo, Erica; Price, Rebecca B; Manfro, Gisele G; Agosta, Federica; Canu, Elisa; Cividini, Camilla; Filippi, Massimo; Kostić, Milutin; Munjiza Jovanovic, Ana; Alberton, Bianca A V; Benson, Brenda; Freitag, Gabrielle F; Filippi, Courtney A; Gold, Andrea L; Leibenluft, Ellen; Ringlein, Grace V; Werwath, Kathryn E; Zwiebel, Hannah; Zugman, André; Grabe, Hans J; Van der Auwera, Sandra; Wittfeld, Katharina; Völzke, Henry; Bülow, Robin; Balderston, Nicholas L; Ernst, Monique; Grillon, Christian; Mujica-Parodi, Lilianne R; van Nieuwenhuizen, Helena; Critchley, Hugo D; Makovac, Elena; Mancini, Matteo; Meeten, Frances; Ottaviani, Cristina; Ball, Tali M; Fonzo, Gregory A; Paulus, Martin P; Stein, Murray B; Gur, Raquel E; Gur, Ruben C; Kaczkurkin, Antonia N; Larsen, Bart; Satterthwaite, Theodore D; Harper, Jennifer; Myers, Michael; Perino, Michael T; Sylvester, Chad M; Yu, Qiongru; Lueken, Ulrike; Veltman, Dick J; Thompson, Paul M; Stein, Dan J; Van der Wee, Nic J A; Winkler, Anderson M; Pine, Daniel S
The goal of this study was to compare brain structure between individuals with generalized anxiety disorder (GAD) and healthy controls. Previous studies have generated inconsistent findings, possibly due to small sample sizes, or clinical/analytic heterogeneity. To address these concerns, we combined data from 28 research sites worldwide through the ENIGMA-Anxiety Working Group, using a single, pre-registered mega-analysis. Structural magnetic resonance imaging data from children and adults (5-90 years) were processed using FreeSurfer. The main analysis included the regional and vertex-wise cortical thickness, cortical surface area, and subcortical volume as dependent variables, and GAD, age, age-squared, sex, and their interactions as independent variables. Nuisance variables included IQ, years of education, medication use, comorbidities, and global brain measures. The main analysis (1020 individuals with GAD and 2999 healthy controls) included random slopes per site and random intercepts per scanner. A secondary analysis (1112 individuals with GAD and 3282 healthy controls) included fixed slopes and random intercepts per scanner with the same variables. The main analysis showed no effect of GAD on brain structure, nor interactions involving GAD, age, or sex. The secondary analysis showed increased volume in the right ventral diencephalon in male individuals with GAD compared to male healthy controls, whereas female individuals with GAD did not differ from female healthy controls. This mega-analysis combining worldwide data showed that differences in brain structure related to GAD are small, possibly reflecting heterogeneity or those structural alterations are not a major component of its pathophysiology.
PMCID:8486763
PMID: 34599145
ISSN: 2158-3188
CID: 5039482