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Yu Y, Xu H, Xu Y, Lu F, Li M. Increased Intra-Individual Variability as a Marker of Executive Dysfunction in Generalized Anxiety Disorder. Front Psychiatry 2022; 13:532778. [PMID: 35392390 PMCID: PMC8980260 DOI: 10.3389/fpsyt.2022.532778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 02/02/2022] [Indexed: 11/20/2022] Open
Abstract
Recent studies suggest that individual difference in intra-individual variability (IIV) of reaction times is an important indicator of attentional executive control. However, there are few existing studies on the executive control of high trait-anxious individuals assessed by using reaction time variability. This study assessed whether executive functions are impaired among clinical and non-clinical trait-anxious individuals indicated by IIV. The cross-reliability and discriminative power of three IIV parameters (raw intra-individual standard deviation, SD; reaction time coefficient of variation, RTCV; and mean absolute deviation, MAD) were compared. Twenty-five non-clinical individuals with low trait anxiety (LTA), 31 non-clinical individuals with high trait anxiety (HTA), and 19 clinical patients diagnosed with generalized anxiety disorder (GAD) finished self-reported measures, an emotional spatial-cuing task, and a non-emotional arrow flanker task. In the emotional task, GAD patients had significantly slower response speed, lower accuracy, and greater IIV parameters than the LTA and HTA groups. In the non-emotional task, the GAD group exhibited poorer processing efficiency, greater SD and RTCV, and intact performance effectiveness. RTCV is suggested to be a better marker of executive dysfunction than SD and MAD due to its good discriminative power and reliability as well as less affected by reaction times.
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Affiliation(s)
- Yongju Yu
- Department of Social Work, School of International Law and Sociology, Sichuan International Studies University, Chongqing, China.,Department of Military Psychology, School of Medical Psychology, Army Medical University, Chongqing, China
| | - Haiyan Xu
- Department of Military Psychology, School of Medical Psychology, Army Medical University, Chongqing, China
| | - Yuanyuan Xu
- Department of Military Psychology, School of Medical Psychology, Army Medical University, Chongqing, China
| | - Fang Lu
- School of Nursing, Army Medical University, Chongqing, China
| | - Min Li
- Department of Military Psychology, School of Medical Psychology, Army Medical University, Chongqing, China
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Ziegler M, Kaiser A, Igel C, Geissler J, Mechler K, Holz NE, Becker K, Döpfner M, Romanos M, Brandeis D, Hohmann S, Millenet S, Banaschewski T. Actigraphy-Derived Sleep Profiles of Children with and without Attention-Deficit/Hyperactivity Disorder (ADHD) over Two Weeks-Comparison, Precursor Symptoms, and the Chronotype. Brain Sci 2021; 11:brainsci11121564. [PMID: 34942866 PMCID: PMC8699578 DOI: 10.3390/brainsci11121564] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/18/2021] [Accepted: 11/23/2021] [Indexed: 11/16/2022] Open
Abstract
Although sleep problems are common in children with ADHD, their extent, preceding risk factors, and the association between neurocognitive performance and neurobiological processes in sleep and ADHD, are still largely unknown. We examined sleep variables in school-aged children with ADHD, addressing their intra-individual variability (IIV) and considering potential precursor symptoms as well as the chronotype. Additionally, in a subgroup of our sample, we investigated associations with neurobehavioral functioning (n = 44). A total of 57 children (6-12 years) with (n = 24) and without ADHD (n = 33) were recruited in one center of the large ESCAlife study to wear actigraphs for two weeks. Actigraphy-derived dependent variables, including IIV, were analyzed using linear mixed models in order to find differences between the groups. A stepwise regression model was used to investigate neuropsychological function. Overall, children with ADHD showed longer sleep onset latency (SOL), higher IIV in SOL, more movements during sleep, lower sleep efficiency, and a slightly larger sleep deficit on school days compared with free days. No group differences were observed for chronotype or sleep onset time. Sleep problems in infancy predicted later SOL and the total number of movements during sleep in children with and without ADHD. No additional effect of sleep problems, beyond ADHD symptom severity, on neuropsychological functioning was found. This study highlights the importance of screening children with ADHD for current and early childhood sleep disturbances in order to prevent long-term sleep problems and offer individualized treatments. Future studies with larger sample sizes should examine possible biological markers to improve our understanding of the underlying mechanisms.
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Affiliation(s)
- Mirjam Ziegler
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
- Correspondence: ; Tel.: +49-(0)-621-1703-4911
| | - Anna Kaiser
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
| | - Christine Igel
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
| | - Julia Geissler
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, University of Würzburg, 97080 Würzburg, Germany; (J.G.); (M.R.)
| | - Konstantin Mechler
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
| | - Nathalie E. Holz
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
- Donders Center for Brain, Cognition and Behavior, Radboud University Nijmegen, 6525 EN Nijmegen, The Netherlands
- Department for Cognitive Neuroscience, Radboud University Medical Center Nijmegen, 6525 EN Nijmegen, The Netherlands
| | - Katja Becker
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Medical Faculty, Philipps-University Marburg and University Hospital Marburg, 35039 Marburg, Germany;
- Center for Mind, Brain and Behavior (CMBB), University of Marburg and Justus Liebig University Giessen, 35032 Marburg, Germany
| | - Manfred Döpfner
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany;
| | - Marcel Romanos
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, University of Würzburg, 97080 Würzburg, Germany; (J.G.); (M.R.)
| | - Daniel Brandeis
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital of Psychiatry, University of Zürich, 8032 Zürich, Switzerland
- Center for Integrative Human Physiology, University of Zürich, 8057 Zürich, Switzerland
- Neuroscience Center Zürich, Swiss Federal Institute of Technology, University of Zürich, 8057 Zürich, Switzerland
| | - Sarah Hohmann
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
| | - Sabina Millenet
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
| | - Tobias Banaschewski
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159 Mannheim, Germany; (A.K.); (C.I.); (K.M.); (N.E.H.); (D.B.); (S.H.); (S.M.); (T.B.)
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