Comorbidity of anxiety disorders in adolescents

Prevalence of psychiatric diagnoses in preterm and full-term children, adolescents and young adults: a meta-analysis

BACKGROUND

Preterm (PT) birth and low birth weight (LBW) are high-prevalence events that are associated with adverse outcomes in the longer term, with vulnerability increasing as maturity at birth decreases. Psychiatric symptomatology appears heightened in PT/LBW survivors, though there are some discordant findings from studies using questionnaire measures, particularly with respect to anxiety and depressive symptoms.

METHOD

This article synthesises findings from research using clinical psychiatric diagnostic criteria in PT/LBW individuals aged 10-25 years compared with term-born peers. Key outcomes of interest were the rates of individuals receiving any psychiatric diagnosis and the number of diagnoses of anxiety or depressive disorders.

RESULTS

A literature search for studies reporting prevalence of 'any diagnosis' yielded five studies that met inclusion criteria, with a total of 565 PT/LBW and 533 control individuals. Also, five studies were found that reported rates of anxiety/depression (692 PT/LBW and 605 control individuals). The risk of these outcomes was increased for PT/LBW individuals compared with controls [any diagnosis: odds ratio (OR) 3.66, 95% confidence interval (CI) 2.57-5.21; anxiety or depressive disorder: OR 2.86, 95% CI 1.73-4.73].

CONCLUSIONS

The studies reviewed here indicate that, in addition to monitoring and management of medical and cognitive sequelae, the psychological well-being of PT/LBW individuals should be a key part of ongoing care.

Association between adolescent emotional problems and metabolic syndrome: the modifying effect of C-reactive protein gene (CRP) polymorphisms

Depression is associated with the development of the metabolic syndrome, and both depression and metabolic syndrome are associated with markers of systemic inflammation, such as C-reactive protein (CRP). We examined associations between affective status in adolescence and adulthood, and the metabolic syndrome at age 53 years in a large representative British birth cohort. We also investigated whether two CRP gene polymorphisms (rs1205 and rs3093068) were associated with affective status and the metabolic syndrome, and whether the association between affective status and the metabolic syndrome was modified by these CRP polymorphisms. Women, but not men, with emotional problems in adolescence were more likely to have the metabolic syndrome (OR=1.53, 95% CI: 1.04, 2.26), although this sex difference was not statistically significant (p=0.22). The CRP SNPs were not associated with affective status or the metabolic syndrome, but the association of adolescent emotional problems with the metabolic syndrome was stronger in those who were homozygous for the major allele (C) of rs1205 (OR=1.83, 95% CI: 1.17, 2.86) than in carriers of the T allele (OR=1.01, 95% CI: 0.66, 1.55) (p=0.05 for gene by affective status interaction). This interaction was stronger when considering adolescent emotional problems as a continuous variable (p=0.003). Adolescent emotional problems play an important role in the development of the metabolic syndrome later in life, particularly in those homozygous for the major allele of CRP rs1205. These findings may highlight new ways of identifying people with emotional problems at high risk of developing the metabolic syndrome, which is of great importance for the management of the physical health of these patients.

Neuroticism as a common dimension in the internalizing disorders

BACKGROUND

Several theories have posited a common internalizing factor to help account for the relationship between mood and anxiety disorders. These disorders are often co-morbid and strongly covary. Other theories and data suggest that personality traits may account, at least in part, for co-morbidity between depression and anxiety. The present study examined the relationship between neuroticism and an internalizing dimension common to mood and anxiety disorders.

METHOD

A sample of ethnically diverse adolescents (n=621) completed self-report and peer-report measures of neuroticism. Participants also completed the Structured Clinical Interview for DSM-IV (SCID).

RESULTS

Structural equation modeling showed that a single internalizing factor was common to lifetime diagnosis of mood and anxiety disorders, and this internalizing factor was strongly correlated with neuroticism. Neuroticism had a stronger correlation with an internalizing factor (r=0.98) than with a substance use factor (r=0.29). Therefore, neuroticism showed both convergent and discriminant validity.

CONCLUSIONS

These results provide further evidence that neuroticism is a necessary factor in structural theories of mood and anxiety disorders. In this study, the correlation between internalizing psychopathology and neuroticism approached 1.0, suggesting that neuroticism may be the core of internalizing psychopathology. Future studies are needed to examine this possibility in other populations, and to replicate our findings.

Child anxiety disorders in public systems of care: comorbidity and service utilization

Little is known about mental health service use among children with anxiety disorders, and even less is known about these children in public sectors of care. In this study, 1,715 children were randomly sampled from one of five public service systems. Psychiatric diagnoses were assessed with a structured interview, and standardized measures were used to assess mental health service utilization. Data from a subsample (n = 779) of youth with psychiatric disorders were analyzed. Analyses revealed that comorbidity among children with anxiety disorders was substantially higher than general population estimates. Approximately 26% of children with anxiety had a comorbid mood disorder, and 62% had a disruptive behavior disorder. Among children with anxiety disorders, those who had comorbid conditions were more likely to receive inpatient services than those without comorbidity. Comorbidity, caregiver strain, and service sector were associated with inpatient and nonspecialty service use in this group. Findings underscore the substantial comorbidity among children with anxiety disorders in public sectors of care and the potential need to adapt evidence-based interventions to meet the complex and multiple needs of these children.

Differentiating interpersonal correlates of depressive symptoms and social anxiety in adolescence: implications for models of comorbidity

Research on psychosocial correlates of depression and social anxiety often has not accounted for their comorbidity. Differentiating correlates of depression and social anxiety may inform the development of comorbidity models. Building on research linking both disorders to interpersonal dysfunction, this study examined interpersonal correlates of depressive symptoms and social anxiety in nonreferred early adolescent (M age = 13.46) girls (n = 83), controlling for comorbid symptoms. Although both showed significant bivariate correlations with peer and family variables, partial correlations revealed that social anxiety (controlling for depressive symptoms) was more strongly related to peer variables (e.g., social competence and trust and communication in friendships), whereas depressive symptoms (controlling for social anxiety) were more strongly related to family variables (e.g., lower trust and greater alienation and conflict). Comorbid girls showed heightened peer and family alienation compared to purely dysphoric or anxious girls. Implications for casual models of comorbidity and for understanding poorer outcomes associated with comorbidity and discussed.

Comorbidity of depressive disorders among adolescents in community and clinical settings

The aim of this article was to examine the comorbidity rates and clinical characteristics of depressive disorders among adolescents in community and clinical settings, using the same methodology. One thousand and thirty-five adolescents from the community setting and 200 adolescents from the clinical setting were interviewed using the computerized Munich version of the Composite International Diagnostic Interview. In both settings, the comorbidity of depressive disorders with other psychiatric disorders was high. About 58% of the depressed adolescents in the community setting had at least one additional disorder, compared with 63.5% in the clinical setting. The most common comorbid pattern was that of depressive and anxiety disorders. Among adolescents with anxiety and depression, 72% and 62% of those in the community and clinical settings, respectively, reported the occurrence of anxiety before that of depression. Depressed adolescents with comorbid disorders used significantly more mental health services than adolescents with depression only. The findings suggest the need to design assessment and intervention strategies to deal with adolescents with multiple disorders.

Course and outcome of major depressive disorder in non-referred adolescents

BACKGROUND

Although major depressive disorder (MDD) is one of the most common disorders in adolescence, little is known about its course and outcome in non-referred adolescents. Therefore, the aims of this article were to examine the course and outcome of MDD in non-referred adolescents, and to examine factors related to its stability.

METHODS

Five hundred and twenty-three adolescents were interviewed twice at an interval of about 15 months using the computerized Munich version of the Composite International Diagnostic Interview.

RESULTS

Of the 90 adolescents who met the diagnosis of MDD at T1, 22 (24.4%) still met the same diagnosis at T2. Sixty-eight (75.6%) of them no longer met the diagnosis of MDD at T2, and in some of these cases, their depression was replaced by several other disorders; 44 adolescents received no diagnostic criteria for any DSM-IV disorders. The factors that were significantly associated with the stability of MDD included the presence of substance use disorders and parental alcohol problems, negative life events and negative coping, past suicidal attempt, suicidal thought, and concrete suicidal plan at the T1-interview. Adolescents with "chronic" (T1 and T2) compared to "transient" (only T1) MDD and those without any disorders were significantly more impaired in various life domains.

LIMITATIONS

This study was based on a small number of adolescents with a chronic MDD.

CONCLUSIONS

The course and outcome of MDD in majority of the adolescents seemed to have a favourable course, whereas in some adolescents, it tended to have a heterogeneous pattern.

Drug usage as a treat to the stability of treatment outcome: a one-year follow-up study of adolescent psychiatric patients

OBJECTIVE

To examine the stability of treatment outcome one year after discharge from an inpatient treatment programme for adolescents with severe behavioural problems combined with psychiatric disorders.

METHOD

Symptom Check List-90 Revised (SCL-90 R) ratings were obtained at admission, discharge and one-year follow-up for 75 patients. Treatment outcome was determined by calculating clinically significant change on the SCL-90 R Global Severity Index (GSI) between admission and discharge. Stability of treatment outcome was determined by comparing the clinically significant changes on the GSI between admission and discharge, and between admission and follow-up.

RESULTS

Compared to baseline, 46.7% of the patients recovered (reliable change was found and their GSI at discharge was below the cutoff point for the functional population), 20% improved (reliable change was found, but the GSI was still above the cutoff point). For the other patients no reliable change was found (12.0%) or they deteriorated (21.3%). At follow-up, compared to the base score, 52.0% recovered, 13.3% improved, 12.0% showed no reliable change, and 22.7% deteriorated. Although for the whole sample no significant change was found between discharge and follow-up, some individual patients continued to improve after discharge, while others deteriorated. Analyses show that drug usage during the follow-up period is a strong predictor for these changes.

CONCLUSION

The results indicated that the majority of the patients recovered or improved during treatment and this treatment outcome was relatively stable at one-year follow-up. However, in a minority of patients the treatment results deteriorated during the one-year follow-up period. Drug usage turned out to be an important predictor for this deterioration.

Minor depression in adolescence: phenomenology and clinical correlates

BACKGROUND

Depressions that fail to meet the diagnostic criteria for major depressive disorder (MDD) may be underdiagnosed and undertreated in adolescent population. Traditionally, they are not considered as serious conditions and the phenomenological nature and clinical correlates of these disorders are largely unknown. In the present study, we used a large, representative and age-standardized sample of adolescents to examine the phenomenology and clinical correlates of minor depression, a poorly understood condition included in the category of Depressive Disorder Not Otherwise Specified in Diagnostic and Statistical Manual of Mental Disorders-Fourth Edition-Text Revised (DSM-IV-TR).

METHODS

909 girls and 945 boys, with mean age of 14, were interviewed by professionals using the Semi-Structured Assessment for the Genetics of Alcoholism (SSAGA).

RESULTS

Although clearly milder condition than MDD, minor depression was associated with marked suicidal thoughts, plans and attempts, recurrences and a high degree of comorbidity. At this early age, despite that 14% of adolescents under 15 had suffered from depressive conditions with severe clinical implications, most of them failing to meet the diagnostic threshold for MDD, only 1.7% had received any psychiatric treatment. 40% of depressive adolescents who had attempted suicide had no contact with mental health services.

LIMITATIONS

Analyzed in a cross-sectional setting, no conclusions about long-term implications could be made.

CONCLUSIONS

The results highlight the clinical and public health significance of non-MDD depressions, e.g. minor depression, which need to be more carefully identified and treated at early age.

[Anxiety in adolescents of a Madrid neighbourhood]

OBJECTIVES

To determine the degree of state-trait anxiety in adolescents and its possible association with several socio-demographic variables.

DESIGN

Descriptive cross-sectional study.

SETTING

First semester of 2004. Two state secondary schools in Area 7, Madrid, Spain.

PARTICIPANTS

Five hundred fifty nine students from the first to third years of secondary education.

MAIN MEASUREMENTS

Two anonymous multiple-choice tests were given out to fill in during class time: STAIC (State-Trait Anxiety Inventory for Children) and a questionnaire of socio-demographic variables (age, sex, immigration, toxic habits, socio-economic and family situation, relationships, view of life, and school results).

RESULTS

Four hundred forty five tests were valid. Mean age, 13.8 (SD, 1.2); 53.5% were girls, 18.7% immigrants, 20.7% took drugs (alcohol, tobacco, or illegal drugs), 32.8% had repeated at least 1 year, 14.3% considered their relationship with their family "bad," 15% referred to a "bad" relation with their class mates and 29.5% had a "bad" view of life. A statistically significant association was established between all these variables and anxiety.

CONCLUSIONS

It is important to know what risk factors are associated with anxiety in order to detect it early and prevent its development to other serious mental disorders. In this study, higher levels of anxiety were found in immigrants, in girls, in drug users, in students in a worse socio-economic situation and in students who have had to repeat a year. This study corroborates the classic risk factors associated with anxiety, but shows that we should take into account a further one: immigration. It also suggests the importance of good family and personal relationships for psychological balance.

Psychosocial and health consequences of adolescent depression in Black and White young adult women

Depression in adolescent girls may result in negative consequences in young adulthood. The Center for Epidemiologic Studies Depression Scale (CES-D) was administered to 1,727 Black and White girls ages 16 to 18 years who participated in the National Heart, Lung, and Blood Institute's Growth and Health Study. Three years later, women in the depressed groups were more likely to be current smokers, had attained a lower level of education, and reported lower self-worth relative to the nondepressed group. Body dissatisfaction, eating concerns, and loneliness were greater in the depressed groups. Relative to Black women, White women who were moderately depressed during adolescence reported more health care services utilization in young adulthood. Prevention efforts for depressed adolescents should be broadly focused to improve young adult outcomes.

Psychological symptoms and nonfatal unintentional injuries among Chinese adolescents: a prospective study

PURPOSE

To describe patterns of nonfatal unintentional injuries and investigate the association of psychological symptoms with injury risk among adolescents in Guangxi, China.

METHODS

Adolescents were selected from middle and high school students in Baise City, Guangxi, China. Psychological symptoms at baseline were measured using SCL-90-R and nonfatal unintentional injuries that occurred among participants were recorded using a standardized injury surveillance questionnaire. Annual injury rates per 100 adolescents by adolescents' demographic and family characteristics were calculated. Student's t-test and the Chi-square test were used to test differences in mean raw scores of SCL-90-R subscales and injury rates. Relative risks and odds ratios of injury with 95% confidence intervals were calculated in univariate analyses and multivariate logistic models.

RESULTS

A total of 1474 middle and high school students finished the study. Of them, 442 reported nonfatal unintentional injuries during the study period, resulting in an annual injury rate of 30.3 per 100 adolescents. Boys had a significantly higher injury rate than girls (32.6% vs. 27.4%). Injury rate decreased as the adolescents' age increased. Compared with adolescents who were not injured, the injured adolescents had higher average raw scores of all subscales of SCL-90-R, with an exception of the subscale for hostility. All SCL-90-R subscales factors, except those for hostility and phobia, were associated with injury risk. After confounding effects of age, gender, and ethnicity were controlled using logistic regression models, SCL-90-R subscales for somatization (OR = 2.00, 95% CI 1.52-2.63), obsessive-compulsiveness (OR = 2.10, 95% CI 1.71-2.58), interpersonal-sensitivity (OR = 1.66, 95% CI 1.34-2.06), depression (OR = 2.00, 95% CI 1.59-2.51), anxiety (OR = 2.08, 95% CI 1.62-2.66), and psychoticism (OR = 1.60, 95% CI 1.26-2.03) were significantly associated with an elevated injury risk.

CONCLUSION

Psychological symptoms are associated with an elevated risk of nonfatal unintentional injury among middle and high school students. Mental health services, such as psychological counseling, may help reduce the risk of nonfatal unintentional injuries among Chinese adolescents.

Relationships between major depressive disorder and comorbid anxiety and personality disorders

OBJECTIVE

The aim of the study was to examine whether comorbid anxiety disorders influence depressed patients' likelihood of meeting criteria for a personality disorder (PD) and whether comorbid anxiety disorders influence the stability of the PDs in patients with remitted depression.

METHODS

The initial sample consisted of 373 outpatients who met criteria for major depressive disorder (MDD) (by Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Revised Third Edition-Patient Edition) and who were enrolled in the 8-week acute treatment phase of a study of fluoxetine for MDD. Sixty-four subjects who responded to fluoxetine treatment in the acute phase met criteria for remission throughout a 26-week continuation phase during which they remained on fluoxetine with or without cognitive behavioral therapy. Stability of PDs was defined as meeting criteria for a PD at both beginning and end point of the continuation treatment phase.

RESULTS

Before fluoxetine treatment, anxious depressed patients (defined as meeting criteria for MDD as well as at least one comorbid anxiety disorder) were significantly more likely to meet criteria for any comorbid PD diagnosis compared with depressed patients without comorbid anxiety disorders. In particular, there was a significant relationship between the presence of Cluster A and C PDs and the presence of anxious depression at baseline before antidepressant treatment. After successful treatment of MDD, we found a significant relationship between anxious depression diagnosed at baseline and the stability of a Cluster C PD diagnosis.

CONCLUSION

Anxious depression may place patients at greater risk of having a PD diagnosis, especially one from Cluster A or C. Once the depression remits, patients who initially met criteria for anxious depression may be more likely to maintain a Cluster C PD diagnosis compared with patients initially diagnosed with MDD alone.

Anxiety Disorders in Childhood: Casting a Nomological Net

Empirical research highlights the need for improving the childhood anxiety disorder diagnostic classification system. In particular, inconsistencies in the stability estimates of childhood anxiety disorders and high rates of comorbidity call into the question the utility of the current DSM criteria. This paper makes a case for utilizing a nomological net model for advancing the understanding of childhood anxiety disorders. In this article, we discuss measurement and assessment issues related to improving the childhood anxiety disorder diagnostic system and show how these issues can be addressed by employing the nomological net of childhood anxiety. Because employing the nomological net involves drawing from etiological process theories to facilitate classification and assessment, an integrative model of childhood anxiety disorders is presented as a tentative heuristic. Then evidence for the existing symptom sets is discussed in the context of how process theory mechanisms may be utilized to improve classification and assessment. Testable hypotheses are presented. Measurement, disorder definition, treatment, and policy implications are also discussed.

Psychiatric Comorbidity Associated with Atopic Disorders in Children and Adolescents

This article examines evidence of an association between psychiatric disorders and atopic disorders in children and adolescents. Findings are discussed within a developmental framework and compared with adult studies, when available, to illustrate similarities and differences between youth and adults. Finally, the article discusses the clinical relevance of comorbid psychiatric and atopic disorders.