Epidemiology and comorbidity of severe mental illnesses in the community: findings from a computerized mental health registry in a large Israeli health organization

Purpose

Maccabi Healthcare Services, a large health maintenance organization (HMO) operating in Israel, has recently constructed a computerized registry of patients with severe mental illnesses (SMI). In the present study, we aimed to use this registry to investigate the epidemiology of schizophrenia and bipolar affective disorder among adults, and to assess their comorbidity and mortality compared to the general population.

Methods

In this historical cohort study, we investigated the age- and sex-specific prevalence and incidence rates of HMO members diagnosed with schizophrenia or bipolar affective disorder between 2003 and 2009. We compared their medical comorbidity and mortality to the general HMO population.

Results

A total of 8,848 and 5,732 patients were diagnosed with bipolar (crude prevalence rate of 5 per 1,000) and schizophrenia (3 per 1,000), respectively. The annual incidence rates were 4.2 and 2.4 per 1,000 for schizophrenia and bipolar disorder, respectively. On average, schizophrenic men were diagnosed 4–5?years earlier than schizophrenic women. Compared to the general population, schizophrenia and bipolar disorder patients had a 12- and 9-year shorter life expectancy, respectively. They were also more likely to be diagnosed with diabetes mellitus (odds ratio of 1.9 and 1.6, respectively).

Conclusions

The current study demonstrates the potential use of automated medical databases to characterize the epidemiology of SMI in the community. The increased comorbidity and mortality among these patients has important implication for health authorities for prevention and delivery of health-care services.     

Age of onset of life-time mental disorders and treatment contact

Background

Early onset of mental disorders is a major social and public health concern as it affects individuals in their most formative years. The impact is more pronounced when early onset is also associated with treatment delay. Little is known about the age of onset (AOO) for mental disorders and its predictors in Singapore.

Method

A national mental health survey was conducted among adult residents aged 18 years and above in Singapore. The composite international diagnostic interview (CIDI 3.0) was used to establish the life-time diagnosis of major depressive disorder (MDD), dysthymia, bipolar disorder, generalized anxiety disorder (GAD), obsessive compulsive disorder (OCD) and alcohol abuse and dependence, and the age of onset as well as any subsequent treatment contact.

Results

A total of 6,616 respondents (mean age of 43.9 years) participated in the survey giving a response rate of 75.9 %. The median AOO for having any one of the mental disorders was 22 years with variation among the different disorders. Predictors for AOO varied across the mental disorders. Only 8 % had sought any treatment in the first year after onset. Males, those belonging to Malay and Indian ethnicities and 50+ age cohorts were less likely to have made treatment contact in the year of onset.

Conclusion

Nearly half of the respondents with any life-time mental disorder would have its onset by age of 22 years, and very few had sought treatment within the first year from onset. The study also identified socio-demographic predictors associated with AOO for mental disorders and delayed treatment contact, thus highlighting a vulnerable subpopulation that can be targeted for outreach and early interventions.     

Country of birth and hospital treatment for psychosis in New South Wales

Background

Migration has been found to be a risk factor for schizophrenia in several high-income countries.

Aim

To examine whether overseas migrants to New South Wales (NSW) have higher rates of admission to psychiatric hospitals for psychotic disorders, including schizophrenia and mania, compared to people born in Australia.

Methods

The country of birth of people admitted to public mental health units for the treatment of psychotic illness and for non-psychotic disorders between 2001 and 2010 was compared to the country of birth for the NSW population in the 2006 census. Meta-analysis was used to estimate the odds of being admitted for any psychotic disorder, for a schizophrenia-related psychosis and for mania compared to non-psychotic disorder, for those born in Australia, New Zealand and for nine global regions.

Results

Those born in Oceania (including Melanesia, Fiji, Samoa, Tonga and other Polynesian islands, but excluding Hawaii and New Zealand) had the highest odds of admission for the treatment of psychosis compared to a non-psychotic disorder and had the highest odds of being admitted with a diagnosis of schizophrenia or mania.

Conclusions

In the years 2001–2010, those born in Oceania were at an increased risk of admission to NSW psychiatric hospitals for the treatment of psychotic illness.     

ESPECTRA: Searching the Bipolar Spectrum in Eating Disorder patients

Background

Genome wide association studies reported two single nucleotide polymorphisms in ANK3 (rs9804190 and rs10994336) as independent genetic risk factors for bipolar disorder. Another SNP in ANK3 (rs10761482) was associated with schizophrenia in a large European sample. Within the debate on common susceptibility genes for schizophrenia and bipolar disorder, we tried to investigate common findings by analyzing association of ANK3 with schizophrenia, bipolar disorder and unipolar depression.

Methods

We genotyped three single nucleotide polymorphisms (SNPs) in ANK3 (rs9804190, rs10994336, and rs10761482) in a case-control sample of German descent including 920 patients with schizophrenia, 400 with bipolar affective disorder, 220 patients with unipolar depression according to ICD 10 and 480 healthy controls. Sample was further differentiated according to Leonhard's classification featuring disease entities with specific combination of bipolar and psychotic syndromes.

Results

We found no association of rs9804190 and rs10994336 with bipolar disorder, unipolar depression or schizophrenia. In contrast to previous findings rs10761482 was associated with bipolar disorder (p = 0.015) but not with schizophrenia or unipolar depression. We observed no association with disease entities according to Leonhard's classification.

Conclusion

Our results support a specific genetic contribution of ANK3 to bipolar disorder though we failed to replicate findings for schizophrenia. We cannot confirm ANK3 as a common risk factor for different diseases.     

Comorbid anxiety disorders alter the association between cardiovascular diseases and depression: the German National Health Interview and Examination Survey

Purpose

This study aims to examine whether specific anxiety disorder comorbidity alters the purported association between depression and specific cardiovascular diseases (CVDs).

Methods

In 4,181 representative German participants of the general population, 12-month prevalence of psychiatric disorders was assessed through the Composite International Diagnostic Interview and CVDs by physician verified diagnosis. Adjusting for conventional risk factors logistic regression analyzed the association between CVDs (peripheral vascular disease (PVD), hypertension, cerebrovascular disease and heart disease) and combinations of comorbidity between depression and anxiety disorder types (panic disorder, specific phobia, social phobia and generalized anxiety).

Results

There were 770 cases of hypertension (18.4 %), 763 cases of cerebrovascular disease (18.2 %), 748 cases of PVD (17.9 %), and 1,087 cases of CVD (26.0 %). In adjusted analyses phobia comorbid with depression was associated with cerebrovascular disease (odds ratio (OR) 1.61; 95 % confidence interval (CI) 1.04–2.50) as was panic disorder (OR 2.89; 95 % CI 1.47–5.69). PVD was significantly associated with panic disorder (adjusted OR 2.97; 95 % CI 1.55–5.69). Panic disorder was associated with CVDs (adjusted OR 2.28; 95 % CI 1.09–4.77) as was phobia (adjusted OR 1.35; 95 % CI 1.04–1.78).

Conclusions

Classification of anxiety and depression according to comorbidity groups showed discrete effects for panic disorder and specific phobia with CVDs, independent from covariates and depression.     

Patterns of comorbidity among mental disorders: a person-centered approach

Objective

Comorbidity poses a major challenge to conventional methods of diagnostic classification. Although dimensional models of psychopathology have shed some light on this issue, the reason for interrelationships among dimensions is unclear. The current study employed an alternative approach to characterizing patterns of comorbidity among common mental disorders by modeling them instead as clusters by using latent class analysis (LCA).

Method

Latent class analyses of Diagnostic and Statistical Manual of Mental Disorders diagnoses from two nationally representative epidemiological samples—the National Comorbidity Survey and National Comorbidity Survey–Replication datasets—were undertaken.

Results

Within each dataset, LCA yielded 5 latent classes exhibiting distinctive profiles of diagnostic comorbidity: a fear class (all phobias and panic disorder), a distress class (depression, generalized anxiety disorder, dysthymia), an externalizing class (alcohol and drug dependence, conduct disorder), a multimorbid class (highly elevated rates of all disorders), and a few-disorders class (very low probability of all disorders). Whereas some disorders were relatively specific to certain classes, others (major depression, posttraumatic stress disorder, social phobia) appeared to be evident across all classes. Profiles for the five classes were highly similar across the two samples. When bipolar I disorder was added to the LCA models, in both samples, it occurred almost exclusively in the multimorbid class.

Conclusions

Comorbidity among mental disorders in the general population appears to occur in a finite number of distinct patterns. This finding has important implications for efforts to refine existing diagnostic classification schemes, as well as for research directed at elucidating the etiology of mental disorders.     

Longitudinal predictors of first time depression treatment utilization among adults with depressive disorders

Purpose

Depressive disorders are a growing public health concern, however, a substantial number of depressed individuals do not receive treatment. This study examined the longitudinal predictors of receiving depression treatment among adults with persistent depressive disorders and no lifetime history of treatment.

Methods

The sample included respondents to the National Epidemiologic Survey on Alcohol Related Conditions (NESARC), a large population-based survey, who met criteria for a 12-month major depressive disorder (MDD) or dysthymia (DYS) and had no prior depression treatment. Bivariate and multivariate analyses were conducted examining which socio-demographic and clinical predictors among individuals with depressive disorders and no prior treatment at Wave 1 were associated with receiving depression treatment at Wave 2 (N?=?337).

Results

Only 47.2% of those with MDD or DYS and no prior treatment at Wave 1 had received depression treatment at Wave 2. Females were more likely to have received treatment at Wave 2: those of Hispanic ethnicity, other race, unmarried, 12?years of education, self-rated health of good/very good/excellent and anxiety disorders were less likely to have received treatment at Wave 2. Those with substance use disorders were more likely to have received treatment at Wave 2.

Conclusions

This study highlights individuals who would likely benefit from increased efforts to enhance depression treatment utilization.     

The epigenome and postnatal environmental influences in psychotic disorders

Objectives

Schizophrenia spectrum disorders and bipolar spectrum disorders are the product of both heritable and non-heritable factors, the impact of which converges at different biological levels. Recent evidence from molecular approaches has provided new insights about how environmental exposures cause persistent alterations in the regulation of gene expression, particularly by so-called epigenetic mechanisms. The aim of this review is to provide an overview of findings of epigenetic studies in psychotic disorders, summarizing findings of human and animal studies on epigenetic alterations due to postnatal environmental exposures associated with psychotic disorders.

Methods

Electronic and manual literature search of MEDLINE, EMBASE and PSYCHINFO, using a range of search terms around epigenetics, DNA methylation, histone modifications, psychoses, schizophrenia, bipolar disorder and environmental risks associated with psychotic disorders as observed in human and experimental animal studies, complemented by review articles and cross-references.

Results

Despite several promising findings of differential epigenetic profiles in individuals with psychotic disorders in the studies published to date, the knowledge of the role of epigenetic processes in psychotic disorder remains very limited, and should be interpreted cautiously given various challenges in this rapidly evolving field of research.

Conclusions

Integration of epigenetic findings into biopsychosocial models of the etiology of psychotic disorders eventually may yield important insights into the biological underpinnings of the onset and course of psychotic disorders.     

Lifetime risk and age of onset distributions of psychiatric disorders: analysis of national sample survey in South Korea

Background

The present study represents the first attempt at examining variation across Korean cohorts with respect to lifetime risk of DSM-IV psychiatric disorders.

Aims

To present data on lifetime prevalence and projected lifetime risk, as well as age of onset (AOO) and demographic correlates of DSM-IV psychiatric disorders as assessed in the nationwide survey of a representative sample of Korean adults.

Method

The survey was based on a multistage area probability sample of non-institutionalized Koreans aged 18–64?years. The Korean version of the Composite International Diagnostic Interview 2.1 (K-CIDI 2.1) was administered by lay interviewers.

Results

Lifetime prevalence of any disorder was 24.6%. Alcohol abuse (9.2%), alcohol dependence (7.0%), major depressive disorder (5.6%), specific phobia (3.8%), and GAD (1.6%) were the most common disorders. The median AOO was earliest for anxiety disorders (age 29), latest for mood disorders (age 47), and intermediate for alcohol use disorders (age 31). Compared to observed lifetime prevalence (24.6%), 35.0% of Koreans will eventually experience one of these disorders. Further, half of the population who present with a psychiatric disorder do so by the age of 32 and younger cohorts are at greater risk for most disorders.

Conclusions

About one-third of the Korean adult population will meet the criteria for a DSM-IV psychiatric disorder at some time during their life. The median age of onset varies from disorder to disorder and younger cohorts appear to be at greater risk for most disorders.     

Prevalence, correlates, comorbidities, and suicidal tendencies of premenstrual dysphoric disorder in a nationwide sample of Korean women

Purpose

We examined the prevalence, correlates, comorbidities, and suicidal tendencies of premenstrual dysphoric disorder (PMDD) according to the DSM-IV criteria in a nationwide sample of Korean women.

Methods

A total of 2,499 women aged 18–64?years participated in this study. Diagnostic assessments were based on the Korean version of the Composite International Diagnostic Interview (CIDI) 2.1 and its 12-month PMDD diagnostic module, which were administered by lay interviewers. The frequencies of DSM-IV psychiatric disorders, insomnia, and suicidal tendency were analyzed among PMDD cases and compared with non-PMDD cases, and both odds ratios and significance levels were calculated.

Results

The 12-month prevalence rate of DSM-IV-diagnosed PMDD was 2.4?%. Among subjects with PMDD, 59.3?% had at least one psychiatric illness; in comparison, the control frequency was 21.8?%. Associations between PMDD and alcohol abuse/dependence, major depressive disorder, post-traumatic stress disorder, social phobia, specific phobia, somatoform disorder, insomnia, and suicidality were overwhelmingly positive and significant (p?<?0.05), after controlling for age. Physical illness and being underweight were associated with increased risks of PMDD (p?<?0.05).

Conclusions

PMDD was prevalent in the nationwide sample of Korean women and was frequently associated with other psychiatric disorders, insomnia, and suicidality, suggesting the need to detect and treat women who experience PMDD.     

The delay between symptom onset and seeking professional treatment for anxiety and depressive disorders in a rural Australian sample

Background

Epidemiological research has revealed that the utilisation of professional mental health services is low among rural Australians, despite a similar prevalence of mental illness to urban communities. However, the extent of this unmet need and the length of delay to first seek treatment in rural communities remain unclear. The aim of this study was to investigate the delay among rural Australians in seeking treatment for anxiety and depressive disorders.

Method

A total of 124 participants with an anxiety or depressive disorder according to the Composite International Diagnostic Interview (CIDI) who were participants of the Australian Rural Mental Health Study (ARMHS) were included in this study. Multivariate methods examined the contribution of clinical (onset age, disorder type and comorbidity), attitudinal/demographic (perceived stigma and current age) and structural (rurality) variables to the delay to first seek help.

Results

The average length of the delay was 18.7?years across disorders (range 0–67). The shortest delays were in depressive disorders (10.41?years) and the longest for social phobia (28.02?years). Multivariate analysis indicated that younger onset age, older current age, diagnosis of panic disorder or depressive disorder, and living in a remote (R) or very remote area (VR) were associated with delays of more than one year.

Conclusion

Delays to first seek treatment for anxiety and depressive disorders appear to be far more prolonged in rural compared to urban Australia. This is particularly the case for Australian residents living in R and VR areas. This is of particular concern due to the significant mental health needs of rural Australians.     

Social and clinical comparison between schizophrenia and bipolar disorder type I with psychosis in Costa Rica

Introduction

Schizophrenia (SC) and bipolar disorder (BP) are two of the most severe and incapacitating mental disorders. It has been questioned whether these two conditions designate distinct illnesses with different etiologies or whether they represent different ends of a clinical spectrum with a common etiology.

Materials and methods

This study compares social and clinical characteristics of 84 SC and 84 BP subjects from the Costa Rican Central Valley (CRCV) using information from the DIGS, FIGS and psychiatric records. Each of these subjects had a best estimate lifetime consensus diagnosis of either bipolar type I or SC.

Results

Subjects with SC differed from subjects with BP in social adjustment measures like marital and employment status, and number of children. Both groups were very similar in years of education, age of onset of their illness, history of other psychiatric co-morbidities, and treatment received.

Discussion

The high percentage of psychosis in the BP group (97.6%) may largely explain the similarities found between groups in their clinical characteristics.

Conclusion

The differences in social and functional decline support the original dichotomy described by Kraepelin based on chronicity and periodicity between these two psychotic disorders.     

Psychiatric disease incidence among Danish Seventh-day Adventists and Baptists

Purpose

Previous studies suggest that religious practice can have a positive effect on mental health, but may also have potential for harm. In Denmark, unique possibilities are available for studying the influence of religious practice on mental health: Denmark is characterized as a secular society and it is possible to follow members of religious societies in nationwide registers. In this study, we follow a cohort of Danish Seventh-day Adventists (SDA) and Baptists in a nationwide psychiatry register and compare the incidence in this cohort with the general population.

Methods

We followed a cohort of 5,614 SDA and 3,663 Baptists in the Danish Psychiatric Central Register, which contained information on psychiatric hospitalizations from 1970 to 2009. Psychiatric disease incidence in the cohort was compared with that in the general Danish population as standardized incidence ratios and within-cohort comparisons were made with a Cox model.

Results

The cohort had decreased incidence of abuse disorders compared to the general population. Furthermore, among Baptists, decreased incidence of unipolar disorders among men and decreased incidence of schizophrenia among women were observed. Surprisingly, we observed an increased incidence rate of unipolar disorder among women.

Conclusions

In this nationwide cohort study with 40 years of follow-up, we observed increased incidence rates of unipolar disorders among women and decreased rates of alcohol- and drug-related psychiatric disorders compared to the general Danish population. We have no mechanistic explanation for the increased incidence of unipolar disorders among women, but discuss several hypotheses that could explain this observation.     

Prevalence of DSM-IV disorders, comorbidity and impairment in 3-year-old Spanish preschoolers

Purpose

The goal is to examine the prevalence, comorbidity and impairment of DSM-IV disorders in 3-year-old children from the Spanish general population.

Method

A sample of 1,341 3-year-old preschoolers were randomly selected and screened for a double-phase design. In total, 622 families were assessed with a diagnostic semi-structured interview and functional impairment measures.

Results

Prevalence of any diagnosis was 29.9 %, the most prevalent disorders being primary insomnia (11.7 %) and oppositional defiant disorder (ODD) (6.9 %). There were no sex differences in the prevalence. One-third of the families had sought professional help for the child’s symptoms, and 9.4 % received treatment (4.4 % psychological and 2.1 % pharmacological). After controlling for other comorbidities, ADHD was significantly associated with ODD, CD, insomnia and social phobia; ODD was associated with CD, separation anxiety, specific phobia and major depression. Diagnostic categories were associated with impairment, family burden, seeking professional help and receiving treatment. A diagnosis was more frequent in children of low socioeconomic status, born outside Spain, from one-parent families, with younger parents and with parents of lower educational level.

Conclusions

Psychopathology, comorbidity and associated factors are very frequent from age three, suggesting a need for efforts of detection, prevention and treatment in the different societies.     

Psychotherapy use in a privately insured population of patients diagnosed with a mental disorder

Purpose

Although there is growing evidence demonstrating the effectiveness of psychotherapy in the treatment of mental disorders, the use of psychotherapy in privately insured populations has not been examined. This study examines utilization rates and correlates of the receipt of psychotherapy.

Methods

A large claims database of US private sector claims was used to examine utilization rates and correlates of receipt of psychotherapy. Altogether, 860,090 adults who received mental health services in 2005 were identified from the database. Multivariate binary regression and general linear models were used to assess the association of patient characteristics with use of psychotherapy, use of group or family therapy and the number of psychotherapy visits based on current procedural terminology (CPT) codes.

Results

Only 32.4% of patients diagnosed with a mental illness received CPT codes indicating receipt of psychotherapy, and of these 96.5% received individual psychotherapy. Almost 75% of individuals diagnosed with posttraumatic stress disorder, 62% with major depressive disorder, and 54% with bipolar disorder received psychotherapy. Larger numbers of psychotherapy visits were associated with posttraumatic stress disorder (PTSD), alcohol use and mild depression. Larger numbers of psychotherapy visits were associated with PTSD, alcohol use and mild depression. Drug use, schizophrenia, bipolar disorder and major depressive disorder (MDD) were associated with fewer psychotherapy visits.

Conclusions

Substantial differences in use of psychotherapy were observed across diagnoses, perhaps reflecting the availability of alternative drug therapies. Greater use of psychotherapy in patients with PTSD may reflect weaker evidence of the effectiveness of pharmacological treatment, while less use in MDD may reflect greater evidence of drug benefits.     

Prevalence, characteristics and comorbidities of anxiety disorders in France: Results from the “Mental Health in General Population” Survey (MHGP)

Purpose

Only a few European countries have carried out large, community-based, national surveys about psychiatric morbidity. Here is presented the first national French survey, aiming to estimate the prevalence of anxiety disorders and associated comorbidities according to sociodemographic characteristics.

Materials and methods

The Mental Health in General Population (MHGP) database is derived from a representative national survey of the French adult population (n = 36,105), conducted between 1999 and 2003. Data collection was done using an anonymous face-to-face interview. The presence of anxiety disorders (generalized anxiety disorder, panic disorder, agoraphobia, social phobia and post-traumatic stress disorder) was assessed using the Mini International Neuropsychiatric Interview.

Results

The overall prevalence of anxiety disorders was estimated to be 21.6%, generalized anxiety disorder being the most prevalent one (12.8%). Women, young people, and people earning low income were identified as the more at risk. Major depressive episode, alcohol abuse and drug addiction frequently co-occur with anxiety disorders (28.3, 4.4 and 2.8% respectively).

Conclusion

The MHGP study showed that anxiety disorders are highly prevalent in France with a high frequency of comorbidities. Our results highlight the need for considering anxiety disorders as a public health priority in France as well as in other European countries.     

Prevalence of mental health disorders among low-income African American adolescents

Purpose

Data on the prevalence of mental health disorders for low-income, urban African American adolescents are scarce. This study presents data about the burden of mental disorders for this understudied population.

Methods

Mental disorders were assessed using the Diagnostic Interview Schedule for Children (C-DISC), Youth Self-Report (YSR), and Child Behavior Checklist (CBCL) among a sample of adolescents and their caregivers from very impoverished neighborhoods in a Southern city.

Results

Based on the C-DISC, 3.8, 5.1 and 7.7 % of adolescents met diagnostic criteria for major depression, post-traumatic stress disorder, and conduct disorder, respectively. There were significant differences among some of the mental health disorders based on adolescent and caregiver characteristics such as sex, school status, caregiver work status, and income level. We found a low prevalence of alcohol, marijuana, and substance abuse and dependence disorders.

Conclusions

Information about the prevalence of mental health disorders in specific communities and populations can assist in addressing unmet needs, planning for services and treatment, and reducing health disparities.     

Money matters: does the reimbursement policy for second-generation antipsychotics influence the number of recorded schizophrenia patients and the burden of stigmatization?

Purpose

In Poland, non-compliance with the reimbursement policy for second-generation antipsychotics (SGA) manifested in prescribing SGA for patients with psychotic disorders other than schizophrenia may result in serious financial penalties. In this study, we aimed at investigating whether the implementation of the reimbursement policy for SGA contributed to increasing the number of patients with a diagnosis of schizophrenia relatively to the number of patients with a diagnosis of other psychotic disorders in outpatient clinics.

Methods

We analyzed data from Yearbooks of Mental Health that were published by the Institute of Psychiatry and Neurology, Warsaw, Poland in the years 1989–2009 registering the number of patients treated for various mental disorders in public facilities in Poland. Temporal trend analysis of the annual number of patients with a diagnosis of psychotic disorders, who were treated at outpatient clinics, was performed.

Results

We found a statistically significant increase in the total number of recorded schizophrenia patients treated at outpatient clinics, as well as in the number of patients treated for the first time at outpatient clinics for schizophrenia. These changes overlap with the implementation of the reimbursement policy for SGA.

Conclusion

Our results suggest that the restricted reimbursement policy for SGA altered the diagnosing process in Poland. It seems that these alterations may have serious social consequences. Given that a diagnosis of schizophrenia is more stigmatizing than a diagnosis of other psychotic disorders, it might be assumed that schizophrenia over-diagnosing, possibly due to reimbursement reasons, add to the enormous burden associated with stigmatization.