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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Primary anxiety disorders and the development of subsequent alcohol use disorder: a 4-year community study of adolescents and young adults

Zimmermann, Petra, Wittchen, Hans-Ulrich, Höfler, Michael, Pfister, Hildegard, Kessler, Ronald C., Lieb, Roselind 29 January 2013 (has links) (PDF)
Background. Cross-sectional findings in community surveys of adults suggest that adolescent anxiety disorders are strong predictors of the subsequent onset of alcohol use, abuse and dependence. However, prospective data that follow a sample of adolescents into adulthood are needed to confirm these associations. Method. Baseline and 4-year follow-up data from the EDSP-Study, a prospective community survey of 3021 (2548 at follow-up) adolescents and young adults aged 14 to 24 years at baseline carried out in Munich, were used. DSM-IV anxiety disorders, alcohol use and alcohol use disorders were assessed with the Munich-Composite-International-Diagnostic-Interview (M-CIDI). Multiple logistic regression analysis, controlling for age, gender, other mental disorders, substance use disorders and antisocial behaviour was used to study the associations of baseline anxiety disorders with the subsequent onset and course of alcohol use and alcohol disorders. Results. Baseline social phobia significantly predicts the onsets of regular use and hazardous use and the persistence of dependence. Panic attacks significantly predict the onsets of hazardous use and abuse as well as the persistence of combined abuse/dependence. Panic disorder significantly predicts the persistence of combined abuse/dependence. Other anxiety disorders do not significantly predict any of the outcomes. Conclusions. Panic and social phobia are predictors of subsequent alcohol problems among adolescents and young adults. Further studies are needed to investigate the underlying mechanisms and the potential value of targeted early treatment of primary panic and social phobia to prevent secondary alcohol use disorders.
22

Evidence that the outcome of developmental expression of psychosis is worse for adolescents growing up in an urban environment

Spauwen, Janneke, Krabbendam, Lydia, Lieb, Roselind, Wittchen, Hans-Ulrich, Van Os, Jim 29 January 2013 (has links) (PDF)
Background. The urban environment may increase the risk for psychotic disorder in interaction with pre-existing risk for psychosis, but direct confirmation has been lacking. The hypothesis was examined that the outcome of subclinical expression of psychosis during adolescence, as an indicator of psychosis-proneness, would be worse for those growing up in an urban environment, in terms of having a greater probability of psychosis persistence over a 3·5-year period. Method. A cohort of 918 adolescents from the Early Developmental Stages of Psychopathology Study (EDSP), aged 14–17 years (mean 15·1 years), growing up in contrasting urban and non-urban environments, completed a self-report measure of psychotic symptoms at baseline (Baseline Psychosis) and at first follow-up around 1 year post-baseline (T1). They were again interviewed by trained psychologists for the presence of psychotic symptoms at the second follow-up on average 3·5 years post-baseline (T2). Results. The rate of T2 psychotic symptoms was 14·2% in those exposed to neither Baseline Psychosis nor Urbanicity, 12·1% in those exposed to Urbanicity alone, 14·9% in those exposed to Baseline Psychosis alone and 29·0% in those exposed to both Baseline Psychosis and Urbanicity. The odds ratio (OR) for the combined exposure was 2·46 [95% confidence interval (CI) 1·46–4·14], significantly greater than that expected if Urbanicity and Baseline Psychosis acted independently. Conclusion. These findings support the suggestion that the outcome of the developmental expression of psychosis is worse in urban environments. The environment may impact on risk for psychotic disorder by causing an abnormal persistence of a developmentally common expression of psychotic experiences.
23

Does urbanicity shift the population expression of psychosis?

Spauwen , Janneke, Krabbendam, Lydia, Lieb, Roselind, Wittchen, Hans-Ulrich, van Os, Jim 26 March 2013 (has links) (PDF)
Growing up in an urban area has been shown to be associated with an increased risk of psychotic disorder in later life. While it is commonly held that a only a tiny fraction of exposed individuals will develop schizophrenia, recent evidence suggests that expression of psychosis in exposed individuals may be much more common, albeit at attenuated levels. Findings are based on a population sample of 2548 adolescents and young adults aged originally 14–24 years, and followed up over almost 5 years up to ages 17–28 years. Trained psychologists assessed all these subjects with the core psychosis sections on delusions and hallucinations of the Munich-Composite International Diagnostic Interview. Growing up in an urban area was associated with an increased risk of expression of psychosis in the adolescents and young adults (adjusted OR 1.31, 95% CI 1.03–1.66). The proxy environmental risk factor that urbanicity represents may shift a relatively large section of the adolescent population along a continuum of expression of psychosis. Other causal influences may be required to make the transition to schizophrenia in adult life.
24

Sex differences in psychosis: normal or pathological?

Spauwen, Janneke, Krabbendam, Lydia, Lieb, Roselind, Wittchen, Hans-Ulrich, van Os, Jim 08 April 2013 (has links) (PDF)
Background: Schizophrenia first appears in adolescence, in boys at an earlier age than girls. The interpretation of this key epidemiological finding crucially depends on whether similar age-related sex differences exist in the expression of associated, subclinical psychosis-like experiences. Methods: Findings are based on a population sample of 2548 adolescents and young adults aged 17–28. Subjects were assessed with the core psychosis sections on delusions and hallucinations of the Munich- Composite International Diagnostic Interview. Results: The risk of subclinical psychotic experiences was significantly higher for males in the younger half of the cohort (17–21 years), but similar in the older half (22–28 years). Conclusions: These findings suggest that normal maturational changes in adolescence with differential age of onset in boys and girls cause the expression of psychosis, the extreme of which is schizophrenia.
25

Physical activity and prevalence and incidence of mental disorders in adolescents and young adults

Ströhle, Andreas, Höfler, Michael, Pfister, Hildegard, Müller, Anne-Grit, Hoyer, Jürgen, Wittchen, Hans-Ulrich, Lieb, Roselind 29 January 2013 (has links) (PDF)
Background: Although positive effects of physical activity on mental health indicators have been reported, the relationship between physical activity and the development of specific mental disorders is unclear. Method: A cross-sectional (12-month) and prospective-longitudinal epidemiological study over 4 years in a community cohort of 2548 individuals, aged 14–24 years at outset of the study. Physical activity and mental disorders were assessed by the DSM-IV Composite International Diagnostic Interview (CIDI) with an embedded physical activity module. Multiple logistic regression analyses controlling for age, gender and educational status were used to determine the cross-sectional and prospective associations of mental disorders and physical activity. Results: Cross-sectionally, regular physical activity was associated with a decreased prevalence of any and co-morbid mental disorder, due to lower rates of substance use disorders, anxiety disorders and dysthymia. Prospectively, subjects with regular physical activity had a substantially lower overall incidence of any and co-morbid mental disorder, and also a lower incidence of anxiety, somatoform and dysthymic disorder. By contrast, the incidence of bipolar disorder was increased among those with regular physical activity at baseline. In terms of the population attributable fraction (PAF), the potential for preventive effects of physical activity was considerably higher for men than for women. Conclusions: Regular physical activity is associated with a substantially reduced risk for some, but not all, mental disorders and also seems to reduce the degree of co-morbidity. Further examination of the evidently complex mechanisms and pathways underlying these associations might reveal promising new research targets and procedures for targeted prevention.
26

Prävalenz von Alkoholkonsum, Alkoholmißbrauch und -abhängigkeit bei Jugendlichen und jungen Erwachsenen / Prevalence of alcohol use, abuse and dependence in adolescents and young adults

Holly, Alexandra, Türk, Dilek, Nelson, Christopher B., Pfister, Hildegard, Wittchen, Hans-Ulrich 23 October 2012 (has links) (PDF)
Alkoholkonsum beginnt häufig bereits im Jugendalter. Allerdings fehlen bisher Erkenntnisse darüber, ob, wie häufig und aufgrund welcher Merkmale Jugendlichen und junge Erwachsene auch bereits klinisch definierte Mißbrauchs- und Abhängigkeitsdiagnosen entwickeln. In der vorliegenden Arbeit werden Ergebnisse einer repräsentativen Untersuchung an 3021 Jugendlichen im Alter von 14-24 Jahren vorgestellt. Neben der Prävalenz von Alkoholmißbrauch und -abhängigkeit nach DSM-IV werden Daten zur Häufigkeit und Menge des Alkoholkonsums berichtet sowie erste Symptome beschrieben. 9,7% der befragten Jugendlichen erhielten aufgrund von DSM-IV-Kriterien eine Mißbrauchsdiagnose, 6,2% eine Abhängigkeitsdiagnose. Bei männlichen Jugendlichen war die Prävalenz wesentlich höher als bei weiblichen. Die Prävalenz war in den älteren Geburtskohorten höher. Als erstes Missbrauchssymptom trat am häufigsten "Gebrauch mit körperlicher Gefährdung" (91,9%), als erstes Abhängigkeitssymptom "Toleranzentwicklung" (34,3%) auf. Erste diagnostische Kriterien einer Alkoholstörung traten zumeist deutlich vor dem 18. Lebensjahr auf. Diese Daten unterstreichen, daß Alkoholmißbrauch und -abhängigkeit bereits im Jugend- und frühen Erwachsenenalter häufig sind. / Alcohol use frequently begins in adolescence. However, only few studies have reported the prevalence of alcohol abuse disorders in adolescents. This paper reports results from a representative study in a sample of 3021 adolescents, aged 14-24 years. The Prevalence of alcohol abuse and dependence according to DSM-IV criteria, as well as the prevalence, frequency and quantity of alcohol abuse and a description of the first occuring symptoms, are presented here. Alcohol abuse was reported by 9.7% of respondents and alcohol dependence by 6.2%. Males were more likely to report an alcohol disorder than females, and the prevalence also increased in the older age cohorts. The most frequent initial symptoms were "hazardous use" (91.9%) for abuse and "tolerance" (34.3%) for dependence. First symptoms have been shown to occur long before the age of 18. These results show that even in adolescents and young adults alcohol abuse and dependence are frequent disorders.
27

The natural course of DSM-IV somatoform disorders and syndromes among adolescents and young adults: a prospective-longitudinal community study

Lieb, Roselind, Zimmermann, Petra, Friis, Robert H., Höfler, Michael, Tholen, Sven, Wittchen, Hans-Ulrich 05 April 2013 (has links) (PDF)
Objective. Although somatoform disorders are assumed to be chronic clinical conditions, epidemiological knowledge on their natural course based on representative samples is not available. Method. Data come from a prospective epidemiologic study of adolescents and young adults in Munich, Germany. Respondents’ diagnoses (N = 2548) at baseline and follow-up on average 42 months later are considered. The follow-up incidence, stability as well as selected baseline risk factors (sociodemographics, psychopathology, trauma exposure) for the incidence and stability of somatoform disorders and syndromes are prospectively examined. Diagnostic information was assessed by using the standardized Munich-Composite International Diagnostic Interview (M-CIDI). Results. Over the follow-up period, incidence rate for any of the covered somatoform diagnoses was 25.7%. Stability for the overall group of any somatoform disorder/syndrome was 48%. Female gender, lower social class, the experience of any substance use, anxiety and affective disorder as well as the experience of traumatic sexual and physical threat events predicted new onsets of somatoform conditions, while stability was predicted by being female, prior existing substance use, affective and eating disorders as well as the experience of a serious accident. Conclusions. At least for a substantial proportion of individuals, the overall picture of somatization seems to be relatively stable, but with fluctuation in the symptom picture over time. Being female, the experience of substance use as well as anxiety disorder seem to constitute risk factors for the onset of new somatoform conditions as well as for a stable course over time.
28

The Accuracy of Prevalence Estimations for Suicide Attempts. How Reliably Do Adolescents and Young Adults Report Their Suicide Attempts?

Christl, Bettina, Wittchen, Hans-Ulrich, Pfister, Hildegard, Lieb, Roselind, Bronisch, Thomas 12 July 2013 (has links) (PDF)
This study explores the accuracy of prevalence estimations for suicide attempts. Data came from the Early Developmental Stages of Psychopathology (EDSP) Study, a prospective community study (mean follow-up period was 42 months) of 3,021 respondents aged 14 to 24 years at the outset of the study. Suicide attempters are at least 1.6 times more likely to drop out than subjects with no suicide attempts and suicidal ideas. A total of 8% of all suicide attempters answered in the negative the depression-related gate questions of all surveys. One-third of all baseline suicide attempters did not report their suicide attempt again at the four years later assessment. In particular, 80% of all nonreporters were female, and almost 60% were aged 14–17 at baseline.
29

Die vielen Gesichter der Jugend

Lenz, Karl 19 April 2012 (has links) (PDF)
Aussagen über "die Jugend" werden der Vielfältigkeit und Differenziertheit jugendlicher Lebensstile nicht gerecht. Denn Jugend ist nur im Plural zu verstehen: was herkömmlich als "die Jugend" bezeichnet wird, umfaßt vielmehr vier deutlich voneinander zu unterscheidende Handlungstypen. Dieses Buch stellt in den Porträts von acht Jugendlichen, je vier Mädchen und Jungen, diese jugendlichen Handlungstypen anschaulich dar: den familienorientierten, den hedonistisch-orientierten, den maskulin-orientierten (den es auch bei Mädchen gibt) und den subjekt-orientierten Typus. Eine kurzweilige Lektüre garantiert die Darstellungsweise: die Jugendlichen kommen selbst ausführlich zu Wort.
30

Was geht auf Facebook eigentlich vor? / What is going on Facebook?

Bischof, Andreas 23 August 2012 (has links) (PDF)
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