Measuring psychosocial outcome is good

Extending Integration: Interventions Supporting Communication and Collaboration Between Patients with Neurological Diseases, Their Informal Caregivers and Healthcare Staff - a Scoping Review

Introduction

Addressing challenges due to demographic changes and the quest for improved value in healthcare requires an extended integrated approach to care that fosters collaboration between all stakeholders, especially within collaboration supporting cognitively impaired patients. The aim is to review existing studies on interventions to improve communication and collaboration between such patients, their caregivers and healthcare staff.

Methods

Following PRISMA guidelines, we systematically searched electronic databases Medline (OVID), CINAHL (Ebsco), and Web of Science (Clarivate) for peer-reviewed literature [2010-2020] focusing on intervention studies. Papers were excluded if not assessing the impact of interventions or only presenting a study protocol.

Results

Twelve studies explored diverse approaches to social support, all with the aim of improving communication and collaboration among stakeholders, and identified three intervention types: supporting empowerment, promoting collaborative disease management, and coping, and enhancing communication and relationships.

Discussion

The interventions employed various approaches and assessed a range of outcomes, demonstrating the benefits of enhancing communication and collaboration among stakeholders. Yet only a few studies included the full triad of partners in care.

Conclusion

There is still much to be done to achieve the extended integration of care services and support that will benefit from patient and caregiver involvement.

Brief rapport: Perceptual aberration in patients at ultra-high risk for psychosis

BACKGROUND

Ultra-high risk (UHR) is considered a forerunner of psychosis, but most UHR individuals do not later convert, yet remain symptomatic, disabled and help-seeking. Thus, there is an increased recognition of the UHR phenotype as a syndrome in itself, rather than merely a risk syndrome. It is therefore essential to investigate outcomes other than transition to psychosis. For this purpose, perceptual aberration appears to be a distinct, as well as a stable and less state-specific vulnerability indicator. We aimed to investigate perceptual aberration and associations with functional, neuro and social cognitive risk factors in an UHR sample.

METHOD

One hundred and twenty UHR and 64 healthy controls were compared on levels of perceptual aberration using the perceptual aberration scale. We further investigated cross-sectional associations between perceptual aberration and CAARMS (as a measure of subthreshold psychotic symptoms) and functional, neuro and social cognitive risk factors within the UHR using Spearmans ρ.

RESULTS

Perceptual aberration was significantly higher in UHR than in healthy controls and was associated with social functioning, executive functioning, and emotion recognition.

CONCLUSION

Our findings are consistent with a view of perceptual aberration as a stable vulnerability indicator that varies little with clinical state.

Mental health, risk and protective factors at micro- and macro-levels across early at-risk stages for psychosis: The Mirorr study

BACKGROUND

The clinical staging model states that psychosis develops through subsequent stages of illness severity. To better understand what drives illness progression, more extensive comparison across clinical stages is needed. The current paper presents an in-depth characterization of individuals with different levels of risk for psychosis (i.e., different early clinical stages), using a multimethod approach of cross-sectional assessments and daily diary reports.

METHODS

Data came from the Mirorr study that includes N = 96 individuals, divided across four subgroups (n₁  = 25, n₂  = 27, n₃  = 24, and n₄  = 20). These subgroups, each with an increasing risk for psychosis, represent clinical stages 0-1b. Cross-sectional data and 90-day daily diary data on psychopathology, well-being, psychosocial functioning, risk and protective factors were statistically compared across subgroups (stages) and descriptively compared across domains and assessment methods.

RESULTS

Psychopathology increased across subgroups, although not always linearly and nuanced differences were seen between assessment methods. Well-being and functioning differed mostly between subgroup 1 and the other subgroups, suggesting differences between non-clinical and clinical populations. Risk and protective factors differed mostly between the two highest and lowest subgroups, especially regarding need of social support and coping, suggesting differences between those with and without substantial psychotic experiences. Subgroup 4 (stage 1b) reported especially high levels of daily positive and negative psychotic experiences.

CONCLUSIONS

Risk for psychosis exists in larger contexts of mental health and factors of risk and protection that differ across stages and assessment methods. Taking a broad, multi-method approach is an important next step to understand the complex development of youth mental health problems.

Cerebral, Psychosocial, Family Functioning and Disability of Persons with Schizophrenia

The human brain is the most cognitively capable of mammalian brains, endowed as it is with an overdeveloped cerebral cortex that, in parallel, renders it vulnerable to mental disorders. Schizophrenia is the expression of the dysregulation of the neuronal activity of cortical and subcortical regions due to modifications in the levels of the various neurotransmitters, especially of dopamine, with a reciprocal, intimate relationship among genes with environmental and psychosocial factors. If the dopaminergic system increases the function prefrontal cortex will be reduced: this is the main reason of social, occupational and familiar disruption. The present article describes the function of the brain in schizophrenia and its relation with anatomical, physiological, and genetic changes, in addition to identifying, psychosocial and family factors that can be determinant in the functionality of the patient. A review of national and international bibliography was conducted bearing in mind the following variables: functioning at the cerebral level; psychosocial functioning, familial functioning, disability, and functionality in persons with schizophrenia. Due to the variety of the issues included in this review, it can be concluded that schizophrenia is the product of a complex array of symptoms, deficits and disabilities. It was identified that there is a reciprocal confluence of diverse genetic, psychosocial, familial, environmental, educative, and social factors which affect the functionality of persons with this disorder. The latter makes it necessary to study the patient taking into consideration all of these components in an integral manner.

Adverse clinical outcomes in people at clinical high-risk for psychosis related to altered interactions between hippocampal activity and glutamatergic function

Preclinical rodent models suggest that psychosis involves alterations in the activity and glutamatergic function in the hippocampus, driving dopamine activity through projections to the striatum. The extent to which this model applies to the onset of psychosis in clinical subjects is unclear. We assessed whether interactions between hippocampal glutamatergic function and activity/striatal connectivity are associated with adverse clinical outcomes in people at clinical high-risk (CHR) for psychosis. We measured functional Magnetic Resonance Imaging of hippocampal activation/connectivity, and 1H-Magnetic Resonance Spectroscopy of hippocampal glutamatergic metabolites in 75 CHR participants and 31 healthy volunteers. At follow-up, 12 CHR participants had transitioned to psychosis and 63 had not. Within the clinical high-risk cohort, at follow-up, 35 and 17 participants had a poor or a good functional outcome, respectively. The onset of psychosis (ppeakFWE = 0.003, t = 4.4, z = 4.19) and a poor functional outcome (ppeakFWE < 0.001, t = 5.52, z = 4.81 and ppeakFWE < 0.001, t = 5.25, z = 4.62) were associated with a negative correlation between the hippocampal activation and hippocampal Glx concentration at baseline. In addition, there was a negative association between hippocampal Glx concentration and hippocampo-striatal connectivity (ppeakFWE = 0.016, t = 3.73, z = 3.39, ppeakFWE = 0.014, t = 3.78, z = 3.42, ppeakFWE = 0.011, t = 4.45, z = 3.91, ppeakFWE = 0.003, t = 4.92, z = 4.23) in the total CHR sample, not seen in healthy volunteers. As predicted by preclinical models, adverse clinical outcomes in people at risk for psychosis are associated with altered interactions between hippocampal activity and glutamatergic function.

Does theory of mind predict specific domains of social functioning in individuals following a first episode psychosis?

Social functioning is a central aspect in the treatment of people with psychosis, even more so with the recovery movement promoting an optimal life in one's environment. A good ability to function socially is, among other things, associated with fewer future complications and a better overall quality of life. However, prognostic markers currently in use (i.e., cognitive functioning) to predict an individual's subsequent functioning do not always produce conclusive results in individuals who have recently experienced a first episode of psychosis (FEP). The objective of this study was to evaluate the prognostic value of theory of mind in FEP individuals. Thirty-seven individuals who were followed in a FEP clinic were recruited for the study. Multiple linear regressions were performed for data analysis. The results suggest that theory of mind may be, for specific domains of social functioning in this sub-population, a more important predictor than cognitive functioning variables; though studies with larger samples are needed to support these results.

Topology predicts long-term functional outcome in early psychosis

Early intervention in psychosis is crucial to improving patient response to treatment and the functional deficits that critically affect their long-term quality of life. Stratification tools are needed to personalize functional deficit prevention strategies at an early stage. In the present study, we applied topological tools to analyze symptoms of early psychosis patients, and detected a clear stratification of the cohort into three groups. One of the groups had a significantly better psychosocial outcome than the others after a 3-year clinical follow-up. This group was characterized by a metabolic profile indicative of an activated antioxidant response, while that of the groups with poorer outcome was indicative of oxidative stress. We replicated in a second cohort the finding that the three distinct clinical profiles at baseline were associated with distinct outcomes at follow-up, thus validating the predictive value of this new stratification. This approach could assist in personalizing treatment strategies.

Expanding the search for emerging mental ill health to safeguard student potential and vocational success in high school: A narrative review

AIM

Young people experiencing mental ill health are more likely than their healthy aged peers to drop out of high school. This can result in social exclusion and vocational derailment. Identifying young people at risk and taking action before an illness is established or school dropout occurs is an important goal. This study aimed to examine evidence for the risk markers and at risk mental states of the clinical staging model (stage 0-1b) and whether these risk states and early symptoms impact school participation and academic attainment.

METHOD

This narrative review assembles research from both the psychiatry and education literature. It examines stage 0 to stage 1b of the clinical staging model and links the risk states and early symptoms to evidence about the academic success of young people in high school.

RESULTS

In accordance with the clinical staging model and evidence from education literature, childhood trauma and parental mental illness can impact school engagement and academic progress. Sleep disturbance can result in academic failure. Undifferentiated depression and anxiety can increase the risk for school dropout. Subthreshold psychosis and hypomanic states are associated with functional impairment and high rates of Not in Employment, Education, or Training (NEET) but are not recognized in the education literature.

CONCLUSION

Risk markers for emerging mental ill health can be identified in education research and demonstrate an impact on a student's success in high school. Clear referral protocols need to be embedded into school life to reduce risk of progression to later stages of illness and support school participation and success.

Onset and transition of and recovery from adverse development: Study methodology

AIM

Early intervention programs for first-episode psychosis have led to the awareness that the period before onset of a first episode is important in light of early intervention. This has induced a focus on the so-called 'at risk mental state' (ARMS). Individuals with ARMS are at increased risk for later psychotic disorder, but also for other psychiatric disorders as well as poor psychosocial functioning. Thus, adequate detection and treatment of ARMS is essential.

METHODS

Since 2018, screening for and treatment of ARMS is recommended standard care in the Netherlands. Implementation is still ongoing. We initiated a naturalistic long-term cohort study of ARMS individuals, the onset and transition of and recovery from adverse development (OnTheROAD) study, with the aim to monitor course and outcome of symptoms and psychosocial functioning over time, as well as patterns of comorbidity and associations with factors of risk and resilience. To this end, participants complete a broad battery of instruments at baseline and yearly follow-up assessments up to 3 years. Outcome is defined in terms of symptom severity level, functioning and quality of life. In particular, we aim to investigate the impact of negative symptoms as part of the ARMS concept. Results from this study can aid in refining the existing ARMS criteria, understanding the developmental course of ARMS and investigating the hypothesized pluripotentiality in outcome of ARMS. New knowledge may inform the further development of specialized early interventions.

RESULTS AND CONCLUSIONS

In this article, we describe the rationale, outline and set-up of OnTheROAD.

Misattributing speech and jumping to conclusions: A longitudinal study in people at high risk of psychosis

Biases in cognition such as Jumping to Conclusions (JTC) and Verbal Self-Monitoring (VSM) are thought to underlie the formation of psychotic symptoms. This prospective study in people with an At Risk Mental State (ARMS) for psychosis examined how these cognitive biases changed over time, and predicted clinical and functional outcomes. Twenty-three participants were assessed at clinical presentation and a mean of 31 months later. Performance on a JTC and VSM tasks were measured at both time points. Relationships to symptom severity, level of function and the incidence of psychotic disorder were then examined. The levels of symptoms, function and VSM all improved over time, while JTC was stable. Five participants (22%) developed a psychotic disorder during the follow-up period, but the risk of transition was not related to performance on either task at baseline, or to longitudinal changes in task performance. JTC performance correlated with symptom severity at baseline and follow-up. Similarly, performance on the two tasks was not related to the level of functioning at follow-up. Thus, while the ARMS is associated with both VSM and JTC biases, neither predict the onset of psychosis or the overall functional outcome.

Dimensional and discrete variations on the psychosis continuum in a Dutch crowd-sourcing population sample

Background

Mild psychotic experiences are common in the general population. Although transient and benign in most cases, these experiences are predictive of later mental health problems for a significant minority. The goal of the present study was to perform examinations of the dimensional and discrete variations in individuals’ reporting of subclinical positive and negative psychotic experiences in a unique Dutch internet-based sample from the general population.

Methods

Positive and negative subclinical psychotic experiences were measured with the Community Assessment of Psychic Experiences in 2870 individuals. First, the prevalence of these experiences and their associations with demographics, affect, psychopathology and quality of life were investigated. Next, latent class analysis was used to identify data-driven subgroups with different symptom patterns, which were subsequently compared on aforementioned variables.

Results

Subclinical psychotic experiences were commonly reported. Both positive and negative psychotic experiences were associated with younger age, more negative affect, anxiety and depression as well as less positive affect and poorer quality of life. Seven latent classes (‘Low psychotic experiences’, ‘Lethargic’, ‘Blunted’, ‘Distressed’, ‘Paranormal’, ‘Distressed_grandiose’ and ‘Distressed/positive psychotic experiences’) were identified that demonstrated both dimensional differences in the number/severity of psychotic experiences and discrete differences in the patterns of reported experiences.

Conclusion

Subclinical psychotic experiences show both dimensional severity variations and discrete symptom-pattern variations across individuals. To understand and capture all interindividual variations in subclinical psychotic experiences, their number, nature and context (co-occurrence patterns) should be considered at the same time. Only some psychotic experiences may lay on a true psychopathological psychosis continuum.

Clinical and functional long-term outcome of patients at clinical high risk (CHR) for psychosis without transition to psychosis: A systematic review

BACKGROUND

Research on patients at clinical high risk (CHR) for psychosis has so far mainly focused on those with transition to frank psychosis (CHR-T patients). However, the majority of CHR patients do not transition (CHR-NT patients) and relatively little information is available on their clinical and functional outcome.

METHODS

We conducted a systematic review on clinical and functional long-term outcome of CHR-NT patients. Studies were included if they had an average follow-up period of at least 24 months and reported on long-term outcome of CHR-NT patients in one or more of the following domains: (non-)remission from CHR, prevalence of clinical symptoms and/or clinical diagnoses (axis I and II), and psychosocial functioning.

RESULTS

Ten publications from seven different single or multicenter studies with average follow-up durations of 2-7.5 years could be included. At the last follow-up assessment 28-71% of CHR-NT patients were not remitted from their CHR and 22-82% still had at least one clinical diagnosis. Approximately half of CHR-NT patients presented with poor psychosocial outcome at 2-year and 6-year follow-up.

CONCLUSIONS

The results suggest that, in the long-term, the majority of CHR-NT patients are not in full clinical remission and seem to suffer from one or more clinical disorders and psychosocial impairments. Since relatively few studies could be identified, further research is required to better understand the trajectories and clinical needs of CHR-NT patients.

Psychopathology, cognition and outcome in Dutch and immigrant first-episode psychosis patients

AIM

The primary aim was to examine differences in baseline symptom expression, neurocognition, social cognition and psychosocial functioning between Dutch, first-generation immigrants and second-generation immigrants with a first-episode psychosis (FEP). The secondary aim was to examine functional and symptomatic change and between-group differences at 12-months follow-up. Associations between migration, baseline characteristics and outcome were explored.

METHODS

Forty-six Dutch, 56 second-generation- and 60 first-generation immigrant patients completed baseline measures for 6 symptom dimensions (positive symptoms, negative symptoms, neurocognitive functioning, social cognitive functioning, excitement and emotional distress) and 5 domains of psychosocial functioning (general functioning, work and study, relationships, self-care and disturbing behaviour). Functioning and psychotic symptoms were assessed at baseline and 12-months follow-up. ANCOVA and t tests were used to assess between-group differences. General linear models were used to explore within-group differences. Backward-regression was used to explore predictors of outcome.

RESULTS

Levels of positive symptoms, excitement and emotional distress did not differ between groups at baseline or follow-up. Dutch patients had lower levels of negative symptoms than both immigrant groups at follow-up. On neurocognition and social cognition, Dutch performed better than second-generation immigrants, who in turn performed better than first-generation immigrants. Psychosocial functioning across all domains at baseline and at 12-months follow-up was similar across groups. Baseline levels of general psychosocial functioning and income were the strongest predictors of outcome at follow-up.

CONCLUSIONS

Psychosocial functioning and symptom profiles are comparable between Dutch, first-generation immigrant and second-generation immigrant FEP patients, excluding neurocognitive and social cognitive deficits. A range of baseline characteristics predicted outcome.

Vulnerability to psychosocial disability in psychosis

Psychosocial disability affects a number of individuals with psychosis and often begins years before the formal onset of disorder. This suggests that for many, their psychosocial disability is enduring, and targeted interventions are therefore needed earlier in their developmental trajectories to ensure that psychosocial disability does not become entrenched. Poor psychosocial functioning also affects individuals with a range of different emerging mental health problems, putting these young people at risk of long-term social marginalisation and economic disadvantage; all of which are known risk factors for the development of psychosis. Identification of the markers of poor psychosocial functioning will help to inform effective treatments. This editorial will discern the early trajectories and markers of poor psychosocial outcome in psychosis, and highlight which individuals are most at risk of having a poor outcome. This editorial will also discuss whether early interventions are currently being targeted appropriately and will propose how intervention and preventative strategies can be implemented, to restore psychosocial trajectories in a way that enables young people to maximise their life chances.

Limited changes in activities of daily life performance ability among people with schizophrenia at clinical settings and the factors moderating the changes

Background

Impaired community functioning and functional ability are common among people with schizophrenia spectrum disorders (SSD). However, changes occurring in activities of daily life (ADL) ability through interventions provided at clinical settings have not been systematically examined in this population.

Methods

We retrospectively collated and analysed changes in ADL ability between admissions and discharges, measured utilising the Assessment of Motor and Process Skills (AMPS), among 72 people with SSD at a public inpatient treatment and rehabilitation facility in Western Australia. Clinical and demographic factors moderating the changes were also determined.

Results

The standardised AMPS motor (p = 0.0088) and process scores (p < 0.0001) improved significantly between admission and discharge. However, overall, the improvements were of small to moderate magnitude, and >60% of participants did not experience significant or meaningful changes. Furthermore, mild to moderate impairment in the AMPS standardised motor (-1.3 SD), and process (-1.6 SD) ability was present at discharge. A logistic regression analysis revealed that low admission AMPS scores and duration of illness of more than five years predicted improvement of the AMPS motor score by discharge, but only the former predicted changes in the process scores. Other demographic, clinical, and treatment-related variables did not affect the outcome of the AMPS scores.

Conclusions

Impairment of ADL ability is recalcitrant in schizophrenia. The improvement was modest and occurred only in a proportion of participants. However, promisingly, chronic illness, low baseline ADL ability, treatment with clozapine and presence of treatment-resistant schizophrenia did not have an adverse effect on the outcome.

Exploring associations between early substance use and longitudinal socio-occupational functioning in young people engaged in a mental health service

Neuropsychiatric disorders (including substance misuse) are associated with the greatest burden of functional disability in young people, and contributory factors remain poorly understood. Early-onset substance use is one candidate risk factor which may inform functional prognosis and facilitate direction of interventions aiming to curtail impairment. Accordingly, we modelled associations between early-onset use of alcohol, tobacco, cannabis and amphetamine-type stimulants (ATSs) and longitudinal socio-occupational functioning (indexed by the Social and Occupational Functioning Assessment Scale) in an observational cohort presenting to early intervention mental health services. A clinical proforma collated demographic, clinical, and socio-occupational information for up to 60-months from presentation to services in young people aged 17-30. Of the wider cohort (n = 2398), 446 participants were selected with complete alcohol and substance use data. Latent class analysis was used to derive an 'early-onset' (n = 243) and 'later-onset' class (n = 203) based on age of first use of alcohol, tobacco, cannabis and ATSs. Maximum-likelihood multilevel analyses modelled functioning over time in care and tested associations with substance use latent class, age, gender and diagnosis. Membership in the 'early-onset' class (B = -1.64, p = 0.05), male gender (B = -3.27, p<0.001) and psychotic disorder diagnosis (B = -7.62, p<0.001) were associated with poorer functioning at presentation and at least one other time-point. To our knowledge, this is the first study to explore associations of early-onset substance use and longitudinal functioning in a cohort of young people with mental disorders. The identified factors may be useful for directing specific social (e.g. Social Recovery Therapy) or occupational (e.g. Individual Placement and Support) interventions to at-risk individuals, early in illness course.

Clozapine and Psychosocial Function in Schizophrenia: A Systematic Review and Meta-Analysis

BACKGROUND

Clozapine has unique efficacy for symptoms in treatment-resistant schizophrenia; however, symptomatic remission is not necessary nor sufficient for functional improvement. No study has pooled the effect of clozapine on psychosocial function across clinical trials.

OBJECTIVE

We conducted a systematic review and meta-analysis to compare the effects of clozapine with other antipsychotics on psychosocial function, and described the predictors of functional outcome.

METHODS

We searched MEDLINE/PubMed, PsychINFO, EMBASE, CINAHL, Scopus, Web of Science, Cochrane Central Register of controlled trials and clinical trial registries till April 2018, with no language limits. Eligible studies were randomised controlled trials of clozapine vs. typical or atypical antipsychotics among adults with treatment-resistant schizophrenia. We included studies with flexible or fixed doses of antipsychotics within the therapeutic range to reflect naturalistic care. Effect sizes of studies were pooled using generic inverse variance and random-effects models and presented as standard mean differences. Study quality was assessed in accordance with the Cochrane Collaboration guideline, and subgroup analyses were carried out to identify potential moderators and methodological biases.

RESULTS

Nine studies with 1279 participants (69.7% male) were included. Clozapine showed beneficial effects on psychosocial function, but both short-term trials [n = 3; comparing 99 people taking clozapine with 97 controls (standardised mean difference = 0.04; 95% confidence interval - 0.24, 0.32; p = 0.77; I² = 0%)] and long-term trials [n = 5; comparing 415 people taking clozapine with 427 controls (standardised mean difference = 0.05; 95% confidence interval - 0.16, 0.27; p = 0.64; I² = 50%)] showed no superiority of clozapine to other antipsychotics in this regard. Only one study explored the predictors of psychosocial function. Baseline severity of illness, illicit drug use, extrapyramidal side effects, sex and cognition explained the variability in functional outcome. A range of scales measured psychosocial function, and the quality of reporting varied across trials.

CONCLUSIONS

Clozapine does not appear superior to other antipsychotics for improvement of psychosocial function. Standardisation of psychosocial function measurement is needed to improve the quality of evidence. Further exploration of the predictors of good psychosocial outcomes with clozapine treatment may improve personalisation of care.

Premorbid adjustment in individuals at ultra-high risk for developing psychosis: a case-control study

AIM

Deterioration in premorbid adjustment is related to ultra-high risk (UHR) individuals developing psychosis, but it has not been examined how UHR individuals' development differs compared to healthy controls. This study investigates differences in premorbid adjustment between UHR individuals and a healthy control group.

METHOD

A total of 48 UHR individuals and 50 healthy controls matched on group level for age, gender and parents' socio-economic status were included in the study. Both groups were assessed with the Premorbid Adjustment Scale (PAS). Based on the PAS scores, composite social and academic scales were computed.

RESULTS

Compared to the healthy controls the UHR individuals' social and academic premorbid adjustment declined across age periods. Social premorbid adjustment declined particularly between late adolescence and adulthood. Academic premorbid adjustment declined particularly between childhood and early adolescence. The UHR individuals had more premorbid adjustment difficulties on both the social and academic scale, and on the individual PAS scales.

CONCLUSION

From childhood UHR individuals have lower levels of social and academic premorbid adjustment compared to healthy controls, and the difficulties increase with age. As such, social and academic premorbid adjustment could be an important focus for early intervention.

Cognitive-behavioural social skills training for first-episode psychosis: a feasibility study

AIM

To conduct a preliminary feasibility examination of cognitive-behavioural social skills training (CBSST) in a first-episode psychosis population.

METHODS

Twenty two first-episode psychosis clients participated in an 18-week CBSST group adapted for a younger population.

RESULTS

Adaptive functioning significantly improved following group participation and was maintained at 3-month follow-up.

CONCLUSION

The CBSST group was feasible and well accepted in the first episode programme. These preliminary findings warrant further testing in a larger trial to determine efficacy.

Effects of Early-Life Stress on Social and Anxiety-Like Behaviors in Adult Mice: Sex-Specific Effects

Stressful events in an early postnatal period have critical implications for the individual's life and can increase later risk for psychiatric disorders. The aim of this study was to investigate the influence of early-life stress on the social behavior of adult male and female mice. C57Bl/6 mice were exposed to maternal separation (MS, 3 h once a day) or handling (HD, 15 min once a day) on postnatal day 2 through 14. Adult male and female mice were tested for social behavior in the social interaction test and for individual behavior in the plus-maze and open-field tests. Female mice exposed to maternal separation had increased social behavior and increased anxiety. MS male mice had no changes in social behavior but had significantly disrupted individual behavior, including locomotor and exploratory activity. Handling had positive effects on social behavior in males and females and decreased anxiety in males. Our results support the hypothesis that brief separation of pups from their mothers (handling), which can be considered as moderate stress, may result in future positive changes in behavior. Maternal separation has deleterious effects on individual behavior and significant sex-specific effects on social behavior.

Exploring functioning in schizophrenia: Predictors of functional capacity and real-world behaviour

Impairment in daily functioning still represents a major treatment issue in schizophrenia and a more in-depth knowledge of underlying constructs is crucial for interventions to translate into better outcomes. This study aims to model factors influencing both functional capacity and real-life behaviour in a sample of outpatients with chronic schizophrenia, through a comprehensive assessment including evaluations of psychopathology, cognitive and social cognitive abilities, premorbid adjustment, family environment and early childhood experiences. No significant correlation was observed between functional capacity and real-life behaviour. Functional capacity was significantly predicted by IQ, while real-life behaviour was significantly predicted by empathy, affect recognition and symptoms. Functional capacity seems mainly related to neurocognition, whereas real-life behaviour appears more complex, requiring the integration of different factors including symptoms, with a major role of empathy. Results thus support a divergence between the two constructs of functioning and their underlying components and highlight the need to target both dimensions through individualized sequential rehabilitation programs in order to optimize functional outcome.

Prediction of conversion to psychosis in individuals with an at-risk mental state: a brief update on recent developments

PURPOSE OF REVIEW

So far, only little more than one-third of individuals classified as being at-risk for psychosis have been shown to actually convert to frank psychosis during follow-up. There have therefore been enormous efforts to improve the accuracy of predicting this transition. We reviewed the most recent studies in the field with the aim to clarify whether accuracy of prediction has been improved by the different research endeavors and what could be done to further improve it, and/or what alternative goals research should pursue.

RECENT FINDINGS

A total of 56 studies published between May 2015 and December 2016 were included, of which eight were meta-analyses. New meta-analytical evidence confirms that established instruments for checking clinical risk criteria have an excellent clinical utility in individuals referred to high-risk services. Within a such identified group of ultra-high-risk (UHR) individuals, especially Brief Limited Intermittent Psychotic Symptoms and Attenuated Psychotic Symptoms seem to predict transition. Further assessments should be performed within the UHR individuals, as risk of transition seems particularly high in those with an even higher severity of certain symptoms such as suspiciousness or anhedonia, in those with lower global or social functioning, poor neurocognitive performance or cannabis abuse. Also, electroencephalography, neuroimaging and blood biomarkers might contribute to improving individual prediction. The most promising approach certainly is a staged multidomain assessment. Risk calculators to integrate all data for an individualized prediction are being developed.

SUMMARY

Prediction of psychosis is already possible with an excellent prognostic performance based on clinical assessments. Recent studies show that this accuracy can be further improved by using multidomain approaches and modern statistics for individualized prediction. The challenge now is the translation into the clinic with a broad clinical implementation.

Potentially important periods of change in the development of social and role functioning in youth at clinical high risk for psychosis

The developmental course of daily functioning prior to first psychosis-onset remains poorly understood. This study explored age-related periods of change in social and role functioning. The longitudinal study included youth (aged 12-23, mean follow-up years = 1.19) at clinical high risk (CHR) for psychosis (converters [CHR-C], n = 83; nonconverters [CHR-NC], n = 275) and a healthy control group (n = 164). Mixed-model analyses were performed to determine age-related differences in social and role functioning. We limited our analyses to functioning before psychosis conversion; thus, data of CHR-C participants gathered after psychosis onset were excluded. In controls, social and role functioning improved over time. From at least age 12, functioning in CHR was poorer than in controls, and this lag persisted over time. Between ages 15 and 18, social functioning in CHR-C stagnated and diverged from that of CHR-NC, who continued to improve (p = .001). Subsequently, CHR-C lagged behind in improvement between ages 21 and 23, further distinguishing them from CHR-NC (p < .001). A similar period of stagnation was apparent for role functioning, but to a lesser extent (p = .007). The results remained consistent when we accounted for the time to conversion. Our findings suggest that CHR-C start lagging behind CHR-NC in social and role functioning in adolescence, followed by a period of further stagnation in adulthood.

Neuroanatomical Predictors of Functional Outcome in Individuals at Ultra-High Risk for Psychosis

Most individuals at ultra-high risk (UHR) for psychosis do not transition to frank illness. Nevertheless, many have poor clinical outcomes and impaired psychosocial functioning. This study used voxel-based morphometry to investigate if baseline grey and white matter brain densities at identification as UHR were associated with functional outcome at medium- to long-term follow-up. Participants were help-seeking UHR individuals (n = 109, 54M:55F) who underwent magnetic resonance imaging at baseline; functional outcome was assessed an average of 9.2 years later. Primary analysis showed that lower baseline grey matter density, but not white matter density, in bilateral frontal and limbic areas, and left cerebellar declive were associated with poorer functional outcome (Social and Occupational Functioning Assessment Scale [SOFAS]). These findings were independent of transition to psychosis or persistence of the at-risk mental state. Similar regions were significantly associated with lower self-reported levels of social functioning and increased negative symptoms at follow-up. Exploratory analyses showed that lower baseline grey matter densities in middle and inferior frontal gyri were significantly associated with decline in Global Assessment of Functioning (GAF) score over follow-up. There was no association between baseline grey matter density and IQ or positive symptoms at follow-up. The current findings provide novel evidence that those with the poorest functional outcomes have the lowest grey matter densities at identification as UHR, regardless of transition status or persistence of the at-risk mental state. Replication and validation of these findings may allow for early identification of poor functional outcome and targeted interventions.

Psychosocial functioning in first-episode psychosis and associations with neurocognition, social cognition, psychotic and affective symptoms

AIM

Most studies on the determinants of psychosocial functioning in first-episode psychosis used few predictors. This study examines the effects of multiple cognitive domains and multiple symptoms on psychosocial functioning.

METHODS

A total of 162 patients with a first-episode psychosis were assessed within 3 months after referral to an early psychosis treatment department. Four psychopathological subdomains (positive and negative symptoms, depression and anxiety) and five subdomains of psychosocial functioning (work/study, relationships, self-care, disturbing behaviour and general psychosocial functioning) were measured. Neurocognitive and social cognitive factors were identified through principal component analyses (PCA) of a 15-measure cognitive battery. Stepwise backward regression models were computed to identify the determinants of psychosocial functioning.

RESULTS

The three neurocognitive and four social cognitive factors identified through PCA were largely independent of psychopathology. The strongest associations were between cognitive factors and anxiety. Higher levels of negative symptoms, poor general neurocognition and poor general social cognition showed strongest associations with impaired psychosocial functioning, followed by low verbal processing speed and low emotion processing speed. Together, these factors accounted for 39.4% of the variance in psychosocial functioning.

CONCLUSIONS

The results suggest that negative symptoms, impaired neurocognition and poor social cognition are related to psychosocial problems in patients with first-episode psychosis. None of the affective or positive symptoms had a marked impact on psychosocial functioning.

Examining the association between social cognition and functioning in individuals at ultra-high risk for psychosis

OBJECTIVE

Social and role functioning are compromised for the majority of individuals at ultra-high risk of psychosis, and it is important to identify factors that contribute to this functional decline. This study aimed to investigate social cognitive abilities, which have previously been linked to functioning in schizophrenia, as potential factors that impact social, role and global functioning in ultra-high risk patients.

METHOD

A total of 30 ultra-high risk patients were recruited from an established at-risk clinical service in Melbourne, Australia, and completed a battery of social cognitive, neurocognitive, clinical and functioning measures. We examined the relationships between all four core domains of social cognition (emotion recognition, theory of mind, social perception and attributional style), neurocognitive, clinical and demographic variables with three measures of functioning (the Global Functioning Social and Role scales and the Social and Occupational Functioning Assessment Scale) using correlational and multiple regression analyses.

RESULTS

Performance on a visual theory of mind task (visual jokes task) was significantly correlated with both concurrent role ( r = 0.425, p = 0.019) and global functioning ( r = 0.540, p = 0.002). In multivariate analyses, it also accounted for unique variance in global, but not role functioning after adjusting for negative symptoms and stress. Social functioning was not associated with performance on any of the social cognition tasks.

CONCLUSION

Among specific social cognitive abilities, only a test of theory of mind was associated with functioning in our ultra-high risk sample. Further longitudinal research is needed to examine the impact of social cognitive deficits on long-term functional outcome in the ultra-high risk group. Identifying social cognitive abilities that significantly impact functioning is important to inform the development of targeted intervention programmes for ultra-high risk individuals.

The prognostic value of formal thought disorder following first episode psychosis

BACKGROUND

Formal thought disorder (FTD) is associated with poor outcome in established psychotic illnesses and it can be assessed as a categorical or dimensional variable. However, its influence on functional outcome and hospitalisation patterns in early psychosis has not been investigated. We evaluated the relationship between FTD and these outcomes in a first episode psychosis (FEP) sample.

MATERIALS AND METHODS

A mixed diagnostic FEP cohort was recruited through an Early Intervention in Psychosis Service in Ireland. Participants were assessed at initial presentation and one year later with the MIRECC GAF to evaluate social and occupational functioning domains. Disorganisation (disFTD), verbosity (verFTD) and poverty (povFTD) dimensions of FTD were examined at both time points, as well as a unitary FTD construct. Analyses were controlled for demographic, clinical and treatment variables.

RESULTS

DisFTD was the only FTD dimension associated with functional outcome, specifically social functioning, on multivariate analysis (beta=0.13, P<0.05). The unitary FTD construct was not associated with functional outcome. DisFTD at FEP presentation predicted a greater number of hospitalisations (adjusted beta=0.24, P<0.001) and prolonged inpatient admission (adjusted OR=1.08, 95% CI 1.02-1.15, P<0.05) following FEP.

CONCLUSIONS

Longitudinal and dimensional evaluation of FTD has a clinical utility that is distinct from a cross-sectional or unitary assessment. Dimensions of FTD may map onto different domains of functioning. These findings are supportive of some of the changes in DSM-V with an emphasis on longitudinal and dimensional appraisal of psychopathology. Communication disorders may be considered a potential target for intervention in psychotic disorders.

The role of obsessive-compulsive symptoms in the perception of insincere speech in first-episode psychosis

OBJECTIVES

The aim of the present study was to investigate the effects of comorbid obsessive-compulsive symptoms (OCS) on the perception of insincere speech (e.g., sarcasm and white lies) in patients with first-episode psychosis.

DESIGN AND METHOD

Participants were 65 patients with nonaffective first-episode psychosis (FEP) and 47 healthy controls. The patient group was divided into two subgroups, those with (FEP+; n= 38) and those without OCS (FEP-; n = 27). The ability to process sarcasm and lie was assessed with the Perception of Social Inference Test (PESIT). Severity of psychotic symptoms and OCS was assessed with the Positive and Negative Syndrome Scale (PANSS) and the Yale-Brown Obsessive Compulsive Scale (Y-BOCS), respectively.

RESULTS

Deficits in the perception of sarcasm and lie were confirmed in patients with nonaffective first-episode psychosis compared to healthy controls. In patients, comorbidity with OCS was associated with worse performance on certain aspects of insincere speech (i.e., lie) compared to FEP- patients. Y-BOCS scores correlated significantly with the perception of lying. The cognitive factor of the PANSS predicted accuracy on the perception of sincere speech, paradoxical sarcasm, and white lies, while the presence of OCS predicted accuracy on the perception of sincere speech and white lies.

CONCLUSIONS

Our finding of impaired counterfactual information processing in patients with first-episode psychosis suggests that these deficits are already present at illness onset. Presence of OCS appears to have additional deleterious effects on the successful interpretation of intentional lying, further supporting that these patients are characterized by more extensive cognitive impairment.

Psychopathological Symptoms Assessed by a System-Specific Approach Are Related to Global Functioning in Schizophrenic Disorders

BACKGROUND

By mostly using a positive-negative approach, several studies have identified factors that influence day-to-day functioning. We applied a different, system-specific approach to expand the knowledge of this issue.

SAMPLING AND METHODS

We recruited a sample of 100 inpatients with a DSM-IV diagnosis of schizophrenia or schizoaffective disorder. Psychopathological characteristics were assessed with the Bern Psychopathology Scale (BPS) and functional characteristics with the Global Assessment of Functioning (GAF) scale. Linear regression analyses were performed with the GAF score as the dependent variable and the global values of the BPS subscores as independent variables. The model was controlled for confounding variables. Spearman rank correlation analyses were used to identify associations between the relevant BPS subdomains and global functioning.

RESULTS

Higher absolute global values of the BPS domains language (px2009; = x2009;0.038) and motor behavior (px2009; = x2009;0.049) were significantly associated with lower GAF scores. These findings remained stable after adjusting for potential confounding variables. A statistically significant negative correlation was found between both qualitative symptoms (rx2009; = x2009;-0.273, px2009; = x2009;0.006) and indirect signs (rx2009; = x2009;-0.269, px2009; = x2009;0.007) of the language domain and GAF scores. Also, quantitative (rx2009; = x2009;-0.211, px2009; = x2009;0.035) and qualitative symptoms (rx2009; = x2009;-0.214, px2009; = x2009;0.033) in the motor behavior domain were associated with poorer functioning.

CONCLUSIONS

A system-specific approach can describe subgroups of patients with poor functioning. Identifying such subgroups could help to utilize targeted treatment opinions in a timely manner. Another goal of future research is to clarify the underlying neurobiological deficits.

Childhood maltreatment and transition to psychotic disorder independently predict long-term functioning in young people at ultra-high risk for psychosis

BACKGROUND

Individuals identified as at ultra-high risk (UHR) for psychosis are at risk of poor functional outcome regardless of development of psychotic disorder. Studies examining longitudinal predictors of poor functioning have tended to be small and report only medium-term follow-up data. We sought to examine clinical predictors of functional outcome in a long-term longitudinal study.

METHOD

Participants were 268 (152 females, 116 males) individuals identified as UHR 2-14 years previously. A range of clinical and sociodemographic variables were assessed at baseline. Functioning at follow-up was assessed using the Social and Occupational Functioning Assessment Scale (SOFAS).

RESULTS

Baseline negative symptoms, impaired emotional functioning, disorders of thought content, low functioning, past substance use disorder and history of childhood maltreatment predicted poor functioning at follow-up in univariate analyses. Only childhood maltreatment remained significant in the multivariate analysis (p < 0.001). Transition to psychosis was also significantly associated with poor functioning at long-term follow-up [mean SOFAS score 59.12 (s.d. = 18.54) in the transitioned group compared to 70.89 (s.d. = 14.00) in the non-transitioned group, p < 0.001]. Childhood maltreatment was a significant predictor of poor functioning in both the transitioned and non-transitioned groups.

CONCLUSIONS

Childhood maltreatment and transition to psychotic disorder independently predicted poor long-term functioning. This suggests that it is important to assess history of childhood maltreatment in clinical management of UHR individuals. The finding that transition to psychosis predicts poor long-term functioning strengthens the evidence that the UHR criteria detect a subgroup at risk for schizophrenia.

The relationship of attitudinal beliefs to negative symptoms, neurocognition, and daily functioning in recent-onset schizophrenia

BACKGROUND

In the early course of schizophrenia, premorbid functioning, negative symptoms, and neurocognition have been robustly associated with several domains of daily functioning. Research with chronic schizophrenia patients suggests that attitudinal beliefs may influence daily functioning. However, these relationships have not been examined in recent-onset schizophrenia patients.

METHODS

The sample consisted of recent-onset schizophrenia outpatients (n = 71) who were on average 21.7 (SD = 3.3) years old, had 12.5 (SD = 1.8) years of education, and 5.9 (SD = 6.3) months since psychosis onset. Patients were assessed for premorbid adjustment, positive and negative symptoms, neurocognition, attitudinal beliefs, and daily functioning. Normal controls (n = 20) were screened for psychopathology and demographically matched to the patients.

RESULTS

Comparisons indicated that recent-onset patients had higher levels of dysfunctional attitudes and lower self-efficacy compared to healthy controls (t = 3.35, P < .01; t = -4.1, P < .01, respectively). Dysfunctional attitudes (r = -.34) and self-efficacy (r = .36) were significantly correlated with daily functioning. Negative symptoms were found to mediate the relationship between self-efficacy and daily functioning (Sobel test, P < .01), as well as between dysfunctional attitudes and daily functioning (Sobel test, P < .05). Neurocognition was a significant mediator of the relationship between self-efficacy and daily functioning (Sobel test, P < .05).

DISCUSSION

Early course schizophrenia patients have significantly more dysfunctional attitudes and lower self-efficacy than healthy subjects. Both self-efficacy and dysfunctional attitudes partially contribute to negative symptoms, which in turn influence daily functioning. In addition, self-efficacy partially contributes to neurocognition, which in turn influences daily functioning.

What drives poor functioning in the at-risk mental state? A systematic review

BACKGROUND

Transition to psychotic disorder has been the traditional outcome of interest for research in the at-risk mental state (ARMS). However, there is growing recognition that individuals with ARMS may function poorly regardless of whether they develop psychosis. We aimed to review the literature to determine whether there are specific factors associated with, or predictive of, functional impairment in the ARMS population.

METHOD

An electronic database search of MEDLINE, PsycINFO and Embase from inception until May 2014 was conducted using keyword search terms synonymous with the at-risk mental state and functioning. Eligible studies were original peer-reviewed English language research articles with populations that met validated at-risk diagnostic criteria and examined the cross-sectional or longitudinal association between any variable and a measure of functioning.

RESULTS

Seventy-two eligible studies were identified. Negative symptoms and neurocognitive impairment were associated with poor functioning in cross-sectional studies. Negative and disorganised symptoms, neurocognitive deficits and poor functioning at baseline were predictive of poor functional outcome in longitudinal studies. Positive symptoms were unrelated to functioning in both cross-sectional and longitudinal studies. Functional disability was persistent and resistant to current treatments.

CONCLUSIONS

Negative and disorganised symptoms and cognitive deficits pre-date frank psychotic symptoms and are risk factors for poor functioning. This is consistent with a subgroup of ARMS individuals potentially having neurodevelopmental schizophrenia. Treatments aimed at improving functioning must be considered a priority on par with preventing transition to psychosis in the development of future interventions in the ARMS group.

Development and preliminary validation of the First Episode Social Functioning Scale for early psychosis

The current study aimed at developing and conducting a preliminary validation a novel social functioning measure for people with early psychosis. The First Episode Social Functioning Scale (FESFS) was developed to cover many domains specific to this population in their contemporary reality. The self-report version of the FESFS was administered to 203 individuals receiving services in first episode clinics. Scores of the GAF, SOFAS, Social Functioning Scale and BPRS were also obtained for parts of the sample to calculate convergent and discriminant validity. A subgroup also answered the FESFS at several time points during treatment in order to determine sensibility to change. Principal component factor analyses and internal consistency analyses revealed the following nine factors with alphas ranging from 0.63 to 0.80: Friendships and social activities, Independent living skills, Interacting with people, Family, Intimacy, Relationships and social activities at work, Work abilities, Relationships and social activities at school, Educational abilities. Convergent and discriminant validity were demonstrated, as well as sensitivity to change. Clinical and research utility of the FESFS are discussed.

Psychotic symptoms, functioning and coping in adolescents with mental illness

BACKGROUND

Psychotic symptoms in the context of psychiatric disorders are associated with poor functional outcomes. Environmental stressors are important in the development of psychosis; however, distress may only be pathogenic when it exceeds an individual's ability to cope with it. Therefore, one interesting factor regarding poor functional outcomes in patients with psychotic symptoms may be poor coping. This paper aimed to address the question whether 1) psychotic symptoms are associated with poorer functioning and 2) whether poor coping moderated the association.

METHODS

In a clinical case-clinical control study of 106 newly-referred adolescent patients with non-psychotic psychiatric disorders, coping was investigated using the Adolescents Coping Scale. Severity of impairment in socio-occupational functioning was assessed with the Children's Global Assessment Scale.

RESULTS

Patients with non-psychotic psychiatric disorders and additional psychotic symptoms (N = 50) had poorer functioning and were more likely to use avoidance-oriented coping compared to patients with non-psychotic psychiatric disorders without psychotic symptoms (N = 56). No differences were found with respect to approach-oriented coping. When stratifying for poor/good coping, only those adolescent patients with psychotic symptoms who applied poor coping (i.e. less use of approach-oriented coping styles [OR 0.24, p < 0.015] and more use of avoidance-oriented coping [OR 0.23, p < 0.034]) had poorer functioning. However, these interactions were not significant.

CONCLUSIONS

Non-adaptive coping and poorer functioning were more often present in adolescents with non-psychotic psychiatric disorders and additional psychotic symptoms. Due to small subgroups, our analyses could not give definitive conclusions about the question whether coping moderated the association between psychotic symptoms and functioning. Improvement of coping skills may form an important target for intervention that may contribute to better clinical and functional outcomes in patients with psychotic symptoms.

Measuring community functioning in schizophrenia with the Social Behaviour Schedule

BACKGROUND

Current emphasis on community integration requires reliable and valid measures of social behaviour; existing assessments largely overlap with symptoms or provide little detail on functioning. This study aims to re-assess the Social Behaviour Schedule (SBS) to fulfil this measurement role.

METHODS

Internal consistency, construct validity and test-retest reliability were investigated in 421 community out-patients with schizophrenia. Concurrent validity was assessed against the Life Skill Profile (LSP), in 143 additional patients.

RESULTS

A 17-item SBS supported the construct validity of four factors: Antisocial Behaviour, Depressed Behaviour, Social Withdrawal and Thought Disturbance. It showed good test-retest reliability and rated significant social behaviour in a community sample. Weak correlations were observed with positive and negative symptoms. With the exception of Depressed Behaviour, the SBS factors showed strong correlations with the LSP.

CONCLUSION

SBS-17 is a valid measure assessing relevant community social functioning factors with relatively few items. The SBS could be useful both in research and in clinical settings.

Early life stress disrupts social behavior and prefrontal cortex parvalbumin interneurons at an earlier time-point in females than in males

Early life stress exposure (ELS) yields risk for psychiatric disorders that might occur though a population-specific mechanism that impacts prefrontal cortical development. Sex differences in ELS effects are largely unknown and are also essential to understand social and cognitive development. ELS can cause dysfunction within parvalbumin (PVB)-containing inhibitory interneurons in the prefrontal cortex and in several prefrontal cortex-mediated behaviors including social interaction. Social behavior deficits are often the earliest observed changes in psychiatric disorders, therefore the time-course and causation of social interaction deficits after ELS are important to determine. PVB interneuron dysfunction can disrupt social behavior, and has been correlated in males with elevated markers of oxidative stress and inflammation, such as cyclooxygenase-2 after ELS. Here, we measured the effects of maternal separation ELS on social interaction behaviors in males and females. Prefrontal cortex PVB and cyclooxygenase-2 were also measured in juveniles and adolescents using Western blots. ELS led to social interaction alterations earlier in females than males. Sexually dimorphic behavioral changes were consistent with prefrontal cortex PVB loss after ELS. PVB levels were decreased in ELS-exposed juvenile females, while males exposed to ELS do not display parvalbumin decreases until adolescence. Early behavioral and PVB changes in females did not appear to be mediated through cyclooxygenase-2, since levels were not affected in ELS females. Therefore, these data suggest that ELS affects males and females differently and with distinct developmental profiles.

Validating a strategy for psychosocial phenotyping using a large corpus of clinical text

OBJECTIVE

To develop algorithms to improve efficiency of patient phenotyping using natural language processing (NLP) on text data. Of a large number of note titles available in our database, we sought to determine those with highest yield and precision for psychosocial concepts.

MATERIALS AND METHODS

From a database of over 1 billion documents from US Department of Veterans Affairs medical facilities, a random sample of 1500 documents from each of 218 enterprise note titles were chosen. Psychosocial concepts were extracted using a UIMA-AS-based NLP pipeline (v3NLP), using a lexicon of relevant concepts with negation and template format annotators. Human reviewers evaluated a subset of documents for false positives and sensitivity. High-yield documents were identified by hit rate and precision. Reasons for false positivity were characterized.

RESULTS

A total of 58 707 psychosocial concepts were identified from 316 355 documents for an overall hit rate of 0.2 concepts per document (median 0.1, range 1.6-0). Of 6031 concepts reviewed from a high-yield set of note titles, the overall precision for all concept categories was 80%, with variability among note titles and concept categories. Reasons for false positivity included templating, negation, context, and alternate meaning of words. The sensitivity of the NLP system was noted to be 49% (95% CI 43% to 55%).

CONCLUSIONS

Phenotyping using NLP need not involve the entire document corpus. Our methods offer a generalizable strategy for scaling NLP pipelines to large free text corpora with complex linguistic annotations in attempts to identify patients of a certain phenotype.