Prevalence of dysthymic disorder in primary care.

BACKGROUND: Dysthymic disorder is characterised as a chronic state of depressed mood which is not otherwise attributable to physical, psychological or social events. While it can occur alone, there is increasing evidence that the majority of individuals who meet criteria for dysthymic disorder also experience more severe episodic mood disorders throughout their lifetime, and there is also an aggregation of mood disorders within their family members. Patients with dysthymic disorder are most often seen in primary care. Some researchers suggest that the majority of these individuals are never diagnosed or are not diagnosed until a more severe episodic mood disorder develops. The objective of this study was to determine the 12-month prevalence of Axis I psychiatric disorders, and in particular dysthymic disorder, in a primary care Health Service Organization in Ontario, Canada. METHODS: Eligible and consenting adults registered with a primary care Health Service Organization were screened using the modified form of the University of Michigan Composite International Diagnostic Interview. RESULTS: Of the 6280 eligible subjects, 4327 (69%) consented to screening. Two hundred and twenty-two (5.1%) subjects screened positive for dysthymic disorder. In addition, 90% of those who screened positive for dysthymic disorder also screened positive for other Axis I disorders including major depressive disorder, panic, simple phobia, and generalized anxiety disorder. CONCLUSIONS: There is much potential for the primary care physician to play a pivotal role in the recognition and treatment of dysthymic disorder and associated Axis I disorders. A focus on the family as a unit for care may be especially important given the reported aggregation of dysthymic disorder within families.     

The impact of comorbid anxiety disorders on the course of dysthymic disorder: a 5-year prospective longitudinal study

BACKGROUND: Few studies have examined the impact of comorbid anxiety disorder on the course of dysthymic disorder despite the high rate of comorbidity between these disorders. This research prospectively examines the naturalistic course of dysthymic disorder in patients with and without a comorbid anxiety disorder over a 5-year period. METHODS: Thirty-two comorbid patients and 54 non-comorbid patients with dysthymic disorder were assessed at three different time points (baseline, 30 months, and 60 months). Follow-up assessments included the Longitudinal Interval Follow-Up Evaluation and Hamilton Rating Scale for Depression (HRSD). RESULTS: The rate of recovery from dysthymic disorder was significantly lower in patients with (31.3%) than without (61.1%) comorbid anxiety disorders and, at all three time points, patients with comorbid anxiety had significantly higher HRSD scores. The estimated recovery rate from anxiety disorders was 53.8%. Only five of the comorbid patients recovered from both dysthymic disorder and all anxiety disorders during follow-up. Including new onsets, 72.1% of patients experienced an episode of an anxiety disorder during the 5 years. LIMITATIONS: There was no pure anxiety disorder group and patients were asked to report on relatively lengthy follow-up intervals. CONCLUSIONS: While the course of dysthymic disorder is debilitating, these results suggest that the prognosis for patients with a comorbid anxiety disorder is even poorer.     

分离性焦虑障碍史与成年期精神疾病的关系(综述)

本文对早期分离性焦虑障碍史与成年期精神疾病两者关系的国外研究文献进行了综述。分析表明:分离性焦虑障碍史与成年期多种精神疾病之间存在关联,纵向研究结果支持分离性焦虑障碍史作为成年期焦虑障碍谱系及抑郁的风险因素,但其是否作为成年期心境恶劣、双相情感障碍、人格障碍、进食障碍的风险因素还需纵向研究的确认。此外,在儿童期,分离性焦虑障碍与性别认同障碍存在共患关系,可能对个体性心理发展产生影响。现有研究中存在的不足是,在检验分离性焦虑障碍史与成年期精神疾病两者关系时,未见有对遗传和环境变量的控制,也少见有对共病进行控制,而这类控制对确认其是否作为风险及风险大小是十分必要的。     

Comorbidity of mental disorders in the post-mortem diagnosis of completed suicide in children and adolescents

In a psychological autopsy of 21 children and adolescents aged 11-19 years who committed suicide as compared with a matched-pair control group, 95% of the suicide victims and 48% of the controls had at least one serious diagnosable mental disorder (P less than 0.02). The presence of two or more mental disorders (comorbidity) was the rule occurring in 81% of the suicide victims and 29% of the controls (P less than 0.001). Mood disorders such as major depression, major depression superimposed on dysthymic disorder and dysthymic disorder coexisted with either alcohol and drug abuse, conduct disorder or other mental disorders in 76% of the victims and 24% of the controls (P less than 0.025). The suicide victims experienced significantly more psychosocial stressors and the poorest level of adaptive functioning. This study suggests that suicide in children and adolescents very frequently is the outcome of serious psychiatric disorders, particularly when associated with drug and alcohol abuse.     

Axis I and II comorbidity in a large sample of patients with obsessive-compulsive disorder

Background: No study has reported yet on the prevalence of both comorbid DSM-IV axis I and personality disorders in a large cohort of OCD patients, and little is known about differences in clinical characteristics between OCD patients with and without comorbid symptoms. Objective: To examine the cross-sectional prevalence of comorbid DSM-IV axis I, and personality disorders in a population of patients with primary obsessive–compulsive disorder (OCD). Method: 420 outpatients with OCD were evaluated for comorbid pathology, demographic, and clinical characteristics. Results: Forty-six percent of the patients were diagnosed with a comorbid disorder. Twenty-seven percent met the criteria for at least one comorbid axis I disorder, 15.6 percent for a comorbid personality disorder, and 20.4 percent for both a comorbid axis I disorder and a personality disorder. Limitations: A limitation of the current study is that the sample was drawn from a psychiatric department specialised in anxiety disorders, which might have underestimated the rate of comorbid diagnoses. Conclusion: Comorbid diagnoses occur less frequently than would be expected on the basis of comparable comorbidity studies in OCD. Associated axis I comorbidity did not affect clinical severity of OCD, but was related to higher levels of depression and anxiety, whereas axis II comorbidity impaired to a higher extent the overall functioning.     

Early- versus late-onset dythymic disorder: comparison in out-patients with superimposed major depressive episodes.

BACKGROUND: This study examined the validity of the early-late onset subtyping distinction in dysthymic disorder. METHODS: Participants were 340 out-patients meeting DSM-III-R criteria for dysthymia and a concurrent major depressive episode (MDE). The sample was drawn from a 12-site double-blind randomized parallel group trial comparing the efficacy of sertraline and imipramine in the treatment of chronic depression. All patients received comprehensive evaluations using semi-structured interviews and rating scales. RESULTS: 73% of the sample met criteria for the early-onset, and 27% for the late-onset, subtype. The early-onset patients had a significantly longer index MDE, significantly higher rates of personality disorders and lifetime substance use disorders, and a significantly greater proportion had a family history of mood disorder. The subgroups did not differ in symptom severity or functional impairment at baseline, nor in response to a 12-week trial of antidepressants. LIMITATIONS: Further work is needed to extend these findings to dysthymic disorder without superimposed MDEs. CONCLUSIONS: These results support the distinction between early-onset and late-onset dysthymic disorder.     

Anxiety disorders comorbidity in mood disorder subgroups: data from a mood disorders clinic

BACKGROUND: Previous research has identified a high rate of anxiety disorders comorbidity in patients with a primary mood disorder diagnosis. Discrepancies between studies in the comorbidity prevalence of specific anxiety disorders in mood disorders, and of anxiety disorders comorbidity between unipolar depression and bipolar mood disorder are in part due to differences in sampling and diagnostic assessment methodology. METHOD: The authors reviewed the charts of 138 patients who received the SCID-P for DSM-III on enrollment in a Mood Disorders Clinic during the period 1982 through 1988. The comorbidity of specific DSM-III Anxiety Disorders with specific mood disorders was determined and comparatively examined using non-parametric statistics. RESULTS: There was high overall comorbidity of anxiety disorders that did not differ between bipolar and unipolar subjects. There were no differences in the comorbidity of individual anxiety disorder diagnoses in the unipolar vs. bipolar groups. However, in unipolar patients with, compared to those without an additional diagnosis of dysthymia, there was greater overall anxiety disorders comorbidity, with a particularly high prevalence of generalized anxiety disorder. LIMITATION: The subgroup of patients with bipolar I disorder was relatively small (N=8). CONCLUSION: Mood and anxiety disorders comorbidity is complex and presents a continuing challenge for both clinicians and researchers.     

Self-injurious behavior and attempted suicide in purging bulimia nervosa: associations with psychiatric comorbidity

BACKGROUND: Few studies, to date, have investigated the relationship between self-damaging behavior and the presence of comorbid psychiatric diagnoses in eating disorders. The aim of the present study was to investigate the axis I and II comorbidity in subjects with bulimia nervosa who report self-injurious behavior and/or suicide attempt. METHODS: The subjects were 95 patients with purging type bulimia nervosa who underwent a clinical evaluation assessing the presence of self-injurious behavior and suicide attempts, comorbidity for axis I and II psychiatric disorders and temperament. RESULTS: No axis I diagnosis was associated with any type of self-injurious behavior, whereas social phobia and bipolar disorder were linked to attempted suicide. Significant independent predictors of impulsive self-injurious behavior were the presence of childhood sexual abuse, high harm avoidance scores, and high self-transcendence scores, whereas childhood sexual abuse, the presence of a cluster B personality disorder, and a low self-directedness were predictors of suicide attempts. Compulsive self-injurious behavior was significantly associated with harm avoidance and cluster C personality disorders. Harm avoidance was also associated with skin picking. CONCLUSIONS: Personality disorders are a frequent correlate of the presence of SIB in purging bulimia nervosa. However, temperament seems to play a more important role. Further studies on larger samples are necessary to confirm our findings in bulimia nervosa and to extend them to other patient populations.     

Hypomania with and without Dysphoria: comparison of comorbidity and clinical characteristics of respondents from a national community sample

OBJECTIVE: To compare rates of comorbidity, treatment utilization, the course of illness, and past year social functioning of Hypomania with and without Dysphoria Hypomania (mixed state). METHOD: The National Epidemiological Survey on Alcohol and Related Conditions (NESARC) was a nationally representative face-to-face survey of 43,093 respondents, aged 18 years and older, conducted in 2001 through 2002. The target population of the survey is the civilian, noninstitutionalized population residing in the United States. RESULTS: Dysphoric Hypomania was associated with an increased lifetime risk for major depression, dysthymic disorder, anxiety disorders and personality disorders compared to Non-Dysphoric Hypomania. The former group had an earlier onset age of major depression, more episodes major depression and hypomania, and had a higher rate of treatment contact than the later group. Past year personal income and the frequency of full-time employment were lower in the Dysphoric Hypomania compared to Non-Dysphoric Hypomania. CONCLUSIONS: Dysphoric Hypomania is a more severe and persistent mood disorder compared to Non-Dysphoric Hypomania.     

Childhood-onset depressive disorders. A follow-up study of rates of rehospitalization and out-of-home placement among child psychiatric inpatients

This report describes preliminary outcome data for a sample of child psychiatric inpatients with diagnoses of major depression and/or dysthymic disorder at the time of their hospitalizations. Depressed children were compared with a contrast group of children with schizophrenia spectrum disorders. Results (based on semi-structured telephone interviews) indicate high rates of rehospitalization among our depressed cohort. Depressed children had rehospitalization rates of 35% and 45% respectively in the first and second years after discharge. Out-of-home placement was rarer in the depressed group, and significantly less likely than for children with schizophrenia spectrum disorders. However, 15% of the depressed cohort were placed out of their homes within the first year of discharge. There were no differences between children with major depressive and dysthymic disorders on these outcome variables, underscoring the serious long-term correlates of childhood dysthymic as well as major depressive disorders.     

Prevalence of depressive and anxiety disorders in an assisted reproductive technique clinic

BACKGROUND: Little is known about the prevalence of specific depressive and anxiety disorders in women before a new course of assisted reproductive technology treatment. Few studies have adopted the proper psychiatric diagnostic procedures. METHODS: All consecutive women visiting the assisted reproduction clinic of a university-affiliated medical centre, with the intention of starting a new assisted reproduction treatment course, were recruited. A psychiatrist made a diagnosis of psychiatric disorders using a structured interview, the Mini-International Neuropsychiatric Interview (MINI). RESULTS: Of a total of 112 participants, 40.2% had a psychiatric disorder. The most common diagnosis was generalized anxiety disorder (23.2%), followed by major depressive disorder (17.0%), and dysthymic disorder (9.8%). Participants with a psychiatric morbidity did not differ from those without in terms of age, education, income, or years of infertility. Women with a history of previous assisted reproduction treatment did not differ from those without in depression or anxiety. CONCLUSIONS: Depressive and anxiety disorders were highly prevalent among women who visited an assisted reproduction clinic for a new course of the treatment. Demographic features and a history of previous assisted reproduction treatment were not risk factors for these psychiatric morbidities in the assisted reproduction clinic.     

Early deficient parenting in depressed outpatients is associated with personality dysfunction and not with depression subtypes.

BACKGROUND: We investigated the associations between recollected levels of parental care and current symptomatology, axis I and axis II comorbidity and family psychiatric history in 248 depressed outpatients. METHODS: The sample was divided into three approximately equal groups according to PBI scores. Current symptomatology was assessed with the SCL-90, SAS and HAM-17. Axis I and axis II comorbidity were assessed with the SCID-P and SCID-II respectively. RESULTS: Deficient parenting was not associated with melancholia, age of onset or severity of depression. Significant linear associations were found for recurrent depression, comorbid substance disorder, current symptomatology and, of most significance, personality disorders. CONCLUSION: Personality dysfunction may mediate the relation between early parental deprivation and adult psychopathology. LIMITATIONS: Possible limitations include retrospective recall of parental care and the state effects of depression on assessment.     

心理门诊人格障碍共病调查

目的:采用人格障碍访谈问卷SCID-II(第2版)在我中心进行人格障碍的共病调查。方法:对125例精神障碍患者进行量表评定及相关的统计分析。结果:(1)71例(56.8%)符合至少一种人格障碍的诊断,常见的为强迫型、回避型、抑郁型、偏执型,人均患有1.62种人格障碍;(2)人格障碍在焦虑障碍、心境障碍和精神分裂症谱系障碍中的共病率在44%-56%之间,均以C组人格障碍最常见。结论:人格障碍的共病现象相当普遍,SCID-II(第2版)基本适用于中国人人格障碍的共病调查。     

Comorbidity burden and its impact on psychosocial morbidity in depressed outpatients

BACKGROUND: Many studies have examined the co-occurrence of depression and one or two nondepressive disorders; however, little research has looked at broad spectrum comorbidity (i.e., comorbidity across several diagnostic categories) in depressed patients. Research on diagnostic practices in routine clinical settings--in which unstructured interviewing is the norm--suggests that comorbid conditions are often not detected [Zimmerman, M., Mattia, J. 1999. Psychiatric diagnosis in clinical practice: Is comorbidity being missed? Compr. Psychiatry, 40, 182-191]. In this study we examined the independent impact of different comorbid diagnostic categories on psychosocial morbidity in psychiatric outpatients with Major Depressive Disorder (MDD). METHODS: Participants were drawn from a pool of 1000 psychiatric outpatients interviewed with the Structured Clinical Interview for DSM-IV diagnoses (SCID-IV; [First, M.B., Spitzer, R.L., Williams, J.B.W., Gibbon, M., 1995. Structured Clinical Interview for DSM-IV (SCID). American Psychiatric Association, Washington, D.C.]). We compared the demographics, clinical characteristics, and psychosocial functioning of depressed outpatients with and without different axis I comorbidities, then conducted multivariate analyses to determine the respective impact of comorbid axis I disorders. RESULTS: Three hundred and seventy-three patients had a principal diagnosis of unipolar MDD. One hundred twenty-nine (34.6%) were diagnosed with MDD only, and 244 (65.4%) had MDD and at least one other axis I disorder. Comorbidity was associated with longer duration of index episode, more psychiatric morbidity, and more social and occupational impairment. There was also a significant relationship between increasing number of comorbid axis I disorders and greater psychiatric and psychosocial impairment. In regression analyses, comorbidity burden (i.e., the number of comorbid axis I disorders) showed the strongest relation to psychiatric and psychosocial impairment. LIMITATIONS: This is not a random sample of depressed outpatients and, thus, may not be generalizable to all outpatients with depression. Second, Axes II and III comorbidity were not assessed. CONCLUSIONS: Comorbidity burden showed the strongest relation to impairment over and above the presence of any particular class of disorders.     

Comorbidity among anxiety disorders: implications for treatment and DSM-IV.

Research on comorbidity among psychological disorders is relatively new. Yet, comorbidity data have fundamental significance for classification and treatment. This significance is particularly apparent in the anxiety disorders, which, prior to DSM-III-R, were subsumed under disorders considered more significant (e.g., psychotic and depressive disorders). After considering definitional, methodological, and theoretical issues of comorbidity, data on comorbidity among the anxiety disorders are reviewed as well as data on comorbidity of anxiety disorders with the depressive, personality, and substance use disorders. Treatment implications are presented with preliminary data on the effects of psychosocial treatment of panic disorder on co-morbid generalized anxiety disorder. Implications of comorbidity for research on the nature of psychopathology and the ultimate integration of dimensional and categorical features in our nosology are considered.     

Self-reported depressive symptoms that differentiate recurrent-episode major depression from dysthymic disorders

The Beck Depression Inventory (BDI) was administered to 168 outpatients diagnosed with recurrent-episode, major-depression disorders and 99 outpatients diagnosed with dysthymic disorders. The mean ratings of 18 BDI items, except for Sense of Failure, Punishment, and Crying, were comparable in both groups; the mean total-BDI score and mean number of BDI items rated were higher for the major depressive disorders than for the dysthymic disorders. A backward stepwise-discriminant analysis revealed that Suicidal Ideas and Loss of Appetite were the two symptoms that most meaningfully distinguished between the two groups. The major depressive patients described more suicidal ideation and loss of appetite than did the dysthymic patients. The results supported the contention that self-report instruments may be useful in differentiating recurrent-episode major depression from dysthymic disorders.     

Using the CES-D in a two-phase survey for depressive disorders among nonreferred adolescents in Taipei: a stratum-specific likelihood ratio analysis

BACKGROUND: Efficient screening is important in two-phase surveys. We examined whether the Center for Epidemiologic Studies Depression Scale (CES-D) is an appropriate instrument for screening depressive disorders among adolescents in Taipei, an ethnic group whose depression is little known of. METHODS: Among the 2440 students of a school in Taipei, aged 12 to 16 years who completed the CES-D and eating attitude test (EAT; response rate=98.5%), 178 were randomly selected from four subgroups defined by the 90th percentile of the two screening tools for face-to-face interview, using the Schedule for Affective Disorders and Schizophrenia for Children (K-SADS). Discriminatory validities of instruments for depressive disorders were estimated, and then a stratum-specific likelihood ratio (SSLR) analysis was conducted for instruments with sufficient validity. RESULTS: The prevalence estimates of depressive disorders varied with different levels of impairment, with a value of 2.4% for major depressive disorder and 0.3% for dysthymic disorder if at least two impairment items were endorsed. The areas under the receiver operative characteristic (ROC) curves were consistently high (0.88-0.90) for major depressive disorder with or without impairment requirement, but low (0.49) for dysthymic disorder without impairment requirement. Three strata of CES-D scores (0-28, 29-48, and > or =49) were derived for major depressive disorder with (SSLR=0.63, 3.00, and 11.75) and without (SSLR=0.61, 5.09, and 10.42) impairment requirement. CONCLUSIONS: The CES-D is useful in screening for major depressive disorder among nonreferred adolescents. Three strata are recommended for its practical application.     

海洛因依赖与人格障碍的共病研究

目的:评估海洛因依赖者中人格障碍的发生率,探讨海洛因依赖者的人格障碍共病情况。方法:采用美国精神障碍诊断与统计手册第4版人格障碍临床定式访谈量表(SCID-II)对120例海洛因依赖者和120名健康对照者进行人格障碍的评估。结果:海洛因依赖患者中人格障碍的共病率是79.2%,且73.3%的患者同时符合两种或以上的人格障碍。患者中最常见的人格障碍是边缘型、反社会型、偏执型、强迫型,男性海洛因依赖者中反社会型人格障碍的发生率显著高于女性(χ~2=11.98,P0.01)。结论:海洛因依赖者中人格障碍的共病现象非常普遍。     

Psychiatric comorbidity of smoking and nicotine dependence

Recent epidemiologic studies have revealed that comorbidity of psychiatric disorders is far more pervasive than previously suspected. Strong associations have been reported between specific substance use disorders and between any mental disorder and any substance use disorder. This report focuses on comorbidity of nicotine dependence, a substance use disorder on which little epidemiologic information is available. Data come from an epidemiologic study of approximately 1000 young adults in southeast Michigan, in which the NIMH-DIS, revised according to DSM-III-R, was used. Lifetime prevalence of nicotine dependence was 20%. Males and females with nicotine dependence had increased odds for alcohol and illicit drug disorders, major depression, and anxiety disorders, compared with nondependent smokers and nonsmokers combined. Major depression and any anxiety disorder were associated specifically with nicotine dependence. Increased odds for alcohol or illicit drug disorders were observed also in nondependent smokers, compared to nonsmokers. History of early conduct problems increased the odds for nicotine dependence among smokers. Potential mechanisms in the comorbidity of nicotine dependence are discussed.     

The Relation of the Dopamine Transporter Gene (DAT1) to Symptoms of Internalizing Disorders in Children

The relation of the dopamine transporter gene (DAT1) to symptoms of internalizing disorders, Tourette's disorder, and obsessive-compulsive disorder was examined using both within- and between-family tests of association. The sample consisted of clinic-referred children and their siblings and controls and their siblings. Between-family association was examined via the association of DAT1 genotypes with disorder symptoms in the population. Symptoms of all eight disorders increased with a greater number of 10-repeat DAT1 alleles. Using a quantitative transmission disequilibrium test (QTDT), linkage and within-family association was indicated by increased symptoms in children who received 10 repeat alleles from heterozygous parents relative to children who received 9 repeat alleles. Four disorders were associated with DAT1 using the QTDT: generalized anxiety, social phobia, obsessive-compulsive, and Tourette's. The effects of comorbidity were investigated by repeating the same between- and within-family analyses on residual scores, with any effects of attention deficit hyperactivity disorder symptoms removed. Although the residuals were associated less strongly with DAT1 than were the original scores, three disorders continued to show association both between and within families: generalized anxiety, Tourette's, and social phobia.