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    Internet addiction is related to attention deficit but not hyperactivity in a sample of high school students
    (Informa Healthcare, 2015) Yilmaz, Savas; Herguner, Sabri; Bilgic, Ayhan; Isik, Umit
    Objective. To assess the effects of attention-deficit/hyperactivity disorder (ADHD) symptom dimensions on Internet addiction (IA) aft er controlling for Internet usage features among high school students. Methods. This study consisted of 640 students (331 females and 309 males) ranging from 14 to 19 years of age. The Internet Addiction Scale, the Conners-Wells 'Adolescent Self-Report Scale-Short Form, and a personal information form were completed by the participants. Statistical analyses were conducted for both sexes and the total sample. Results. According to the logistic regression analysis, attention deficit and playing online games were significant predictors of IA in both sexes. Other predictors of IA included behavioral problems for females, total weekly Internet usage time, and lifelong total Internet use for males. Hyperactivity and other Internet usage features did not predict IA. Conclusion. These results suggest that attention deficit and playing online games are important determinants of IA in this age group.
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    Psychiatric symptoms and health-related quality of life in children with epilepsy and their mothers
    (Academic Press Inc Elsevier Science, 2018) Bilgic, Ayhan; Isik, Umit; Colak, Rukiye Sivri; Derin, Hatice; Caksen, Huseyin
    Purpose: This study evaluated the psychiatric symptoms and health-related quality of life (HRQL) of children with epilepsy and psychiatric symptoms of their mothers, and compared them to those of healthy children and their mothers. This study also explored the influence of the child-related and maternal psychiatric variables and seizure-specific factors on the HRQLs of children with epilepsy according to both the children's and parents' perspectives. Method: Ninety-nine children with epilepsy (8 to 17 years old), their mothers, and a control group (n=51) participated in this study. The depression and anxiety symptoms of the children were assessed using the Child Depression Inventory (CDI) and the Screen for Child Anxiety-Related Emotional Disorders (SCARED), respectively. The severities of the attention-deficit/hyperactivity disorder (ADHD), oppositional defiant disorder (ODD), and conduct disorder (CD) symptoms were assessed via the mother-rated Turgay DSM-IV-Based Child and Adolescent Behavioral Disorders Screening and Rating Scale (T-DSM-IV-S). In addition, the mothers completed the Beck Depression Inventory (BDI) and Beck Anxiety Inventory (BAI) to assess their depression and anxiety symptoms, respectively. Child-reported and parent-reported Pediatric Quality of Life Inventories were used to evaluate the HRQLs of the children. Results: The patients exhibited higher inattention and ODD scores than the controls did. With the exception of the child-reported physical health scores, all of the child- and parent-reported HRQL scores were significantly lower in the patient group. According to the regression analysis, the child-related psychiatric and seizure-specific factors, but not the maternal psychiatric factors, were associated with the child's HRQL. The explained variances for the overall HRQL and HRQL subscales were similar between the child-reported (0.373 to 0.654) and parent-reported (0.499 to 0.682) questionnaires. The largest contributors to the total variance were the child-related psychiatric factors for both the child-reported and parent-reported HRQLs by far. Conclusion: Epilepsy is associated with a poor psychiatric status and HRQL in childhood. The impact of epilepsy on the HRQL occurs mainly through child-related psychiatric factors. Both the child-reported and parent-reported questionnaires seem to be useful for the evaluation of the HRQL in pediatric epilepsy cases. (C) 2017 Elsevier Inc. All rights reserved.
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    The relationships of parent- and child-related psychiatric conditions with oppositional defiant disorder and conduct disorder symptoms in children with ADHD
    (Routledge Journals, Taylor & Francis Ltd, 2021) Bilgic, Ayhan; Uzun, Necati; Isik, Umit; Acikel, Sadettin Burak; Coskun, Fatma; Akca, Omer Faruk
    This cross-sectional study evaluated the impacts of maternal and paternal affective temperament traits, maternal and paternal ADHD, depression and anxiety symptoms, parenting styles, child's depression and anxiety disorder symptoms, and child's autistic traits on the oppositional defiant disorder (ODD) and conduct disorder (CD) symptoms of children with attention-deficit/hyperactivity disorder (ADHD). Analysis showed a positive relation of maternal anxious and irritable temperament and child inattention, hyperactivity-impulsivity and obsessive-compulsive disorder (OCD) scores on ODD scores. However, there was a negative relationship between parental acceptance/involvement and ODD scores. Regarding CD scores, maternal irritable and paternal cyclothymic and hyperthymic temperament scores and child ODD and autistic trait scores showed a positive relationship, whereas maternal ADHD showed a negative relationship on CD scores. Certain parental affective temperaments, parenting styles, child's OCD and autistic traits, and maternal ADHD may be important for the severity of disruptive behavioral disorder symptoms in children with ADHD.
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    Serum brain-derived neurotrophic factor, glial-derived neurotrophic factor, nerve growth factor, and neurotrophin-3 levels in children with attention-deficit/hyperactivity disorder
    (Springer, 2017) Bilgic, Ayhan; Toker, Aysun; Isik, Umit; Kilinc, Ibrahim
    It has been suggested that neurotrophins are involved in the etiopathogenesis of attention-deficit/hyperactivity disorder (ADHD). This study aimed to investigate whether there are differences in serum brain-derived neurotrophic factor (BDNF), glial-derived neurotrophic factor (GDNF), nerve growth factor (NGF), and neurotrophin-3 (NTF3) levels between children with ADHD and healthy controls. A total of 110 treatment-naive children with the combined presentation of ADHD and 44 healthy controls aged 8-18 years were enrolled in this study. The severity of ADHD symptoms was determined by scores on the Conners' Parent Rating Scale-Revised Short and Conners' Teacher Rating Scale-Revised Short. The severity of depression and anxiety symptoms of the children were evaluated by the self-report inventories. Serum levels of neurotrophins were measured using commercial enzyme-linked immunosorbent assay kits. The multivariate analysis of covariance (MANCOVA) revealed a significant main effect of groups in the levels of serum neurotrophins, an effect that was independent of age, sex, and the severity of the depression and anxiety. The analysis of covariance (ANCOVA) indicated that the mean serum GDNF and NTF3 levels of ADHD patients were significantly higher than that of controls. However, serum BDNF and NGF levels did not show any significant differences between groups. No correlations between the levels of serum neurotrophins and the severity of ADHD were observed. These results suggest that elevated serum GDNF and NTF3 levels may be related to ADHD in children.
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    Serum levels of cortisol, dehydroepiandrosterone, and oxytocin in children with attention-deficit/hyperactivity disorder combined presentation with and without comorbid conduct disorder
    (Elsevier Ireland Ltd, 2018) Isik, Umit; Bilgic, Ayhan; Toker, Aysun; Kilinc, Ibrahim
    The present study aimed to investigate serum cortisol, dehydroepiandrosterone (DHEA), and oxytocin levels of children with attention-deficit/hyperactivity disorder (ADHD) combined presentation and those diagnosed with ADHD combined presentation and coexisting conduct disorder. A total of 74 drug-naive children with ADHD combined presentation alone, 32 children with ADHD combined presentation + conduct disorder, and 42 healthy controls were included. The severities of ADHD and conduct disorder symptoms were assessed via parent- and teacher-rated questionnaires. The severity of aggression, anxiety, and depression symptoms of the children were assessed by the self-report inventories. Independent of potential confounders, including age, sex, pubertal stage, and severity of depression and anxiety, serum oxytocin levels of the ADHD combined presentation + conduct disorder group were significantly lower than those of both the ADHD combined presentation alone and control groups. There was also a trend for the ADHD combined presentation + conduct disorder group to show lower serum DHEA levels than that of the ADHD combined presentation alone group. However, serum cortisol levels did not show significant alterations among the groups. These findings suggest that oxytocin and DHEA may play a role in the pathophysiology of conduct disorder, at least in the presence of ADHD combined presentation.