Publications by authors named "Oluyomi Esan"

Aims: Mental disorders characterized by preoccupation with distressing bodily symptoms and associated functional impairment have been a target of major reconceptualization in the ICD-11, in which a single category of Bodily Distress Disorder (BDD) with different levels of severity replaces most of the Somatoform Disorders in ICD-10. This study compared the accuracy of clinicians' diagnosis of disorders of somatic symptoms using either the ICD-11 or ICD-10 diagnostic guidelines in an online study.

Methods: Clinically active members of the World Health Organization's Global Clinical Practice Network (N = 1065) participating in English, Spanish, or Japanese were randomly assigned to apply ICD-11 or ICD-10 diagnostic guidelines to one of nine pairs of standardized case vignettes.

View Article and Find Full Text PDF

Background: There is evidence of an association between life events and psychosis in Europe, North America and Australasia, but few studies have examined this association in the rest of the world.

Aims: To test the association between exposure to life events and psychosis in catchment areas in India, Nigeria, and Trinidad and Tobago.

Method: We conducted a population-based, matched case-control study of 194 participants in India, Nigeria, and Trinidad and Tobago.

View Article and Find Full Text PDF

Background: Antepartum depression is the most common mental health disorder in pregnancy and it is also a risk factor for adverse perinatal outcomes. Low and middle income countries like Nigeria bear a higher burden of antepartum depression compared with high income countries. Prioritizing mental health issues among pregnant women is crucial to achieving the Sustainable Development Goals.

View Article and Find Full Text PDF

Background: Bipolar disorder is highly under-researched in Africa. Existing studies show that racial/ethnic disparities exist for sleep quality. Poor sleep quality in bipolar disorder causes significant morbidity and mortality even during periods of euthymia.

View Article and Find Full Text PDF

Background: The aim of the current study was to explore the effect of gender, age at onset, and duration on the long-term course of schizophrenia.

Methods: Twenty-nine centers from 25 countries representing all continents participated in the study that included 2358 patients aged 37.21 ± 11.

View Article and Find Full Text PDF

Background: Few Nigerian studies have examined BMI in people with schizophrenia. The aims of the present study were to assess the prevalence and distribution of obesity in Nigerians with schizophrenia and to examine the clinical correlates of BMI and obesity.

Methods: A total of 207 people with schizophrenia met the inclusion criteria and were evaluated for BMI.

View Article and Find Full Text PDF

Background: Traditional and faith healers (TFH) provide care to a large number of people with psychosis in many sub-Saharan African countries but they practise outside the formal mental health system. We aimed to assess the effectiveness and cost-effectiveness of a collaborative shared care model for psychosis delivered by TFH and primary health-care providers (PHCW).

Methods: In this cluster-randomised trial in Kumasi, Ghana and Ibadan, Nigeria, we randomly allocated clusters (a primary care clinic and neighbouring TFH facilities) 1:1, stratified by size and country, to an intervention group or enhanced care as usual.

View Article and Find Full Text PDF

Background: Neurocognitive impairments (NCI) are common in patients with bipolar I disorder. However, reports about the affected domains, outcomes and magnitude have been inconsistent. The aim of this study was to compare the magnitude (severity) and specificity (domains), of (NCI) in euthymic Bipolar I Disorder (BD) patients with a demographically and educationally matched sample of patients with schizophrenia in remission (SC) and healthy controls (HC).

View Article and Find Full Text PDF

Background: The aim of the current study was to explore the changing interrelationships among clinical variables through the stages of schizophrenia in order to assemble a comprehensive and meaningful disease model.

Methods: Twenty-nine centers from 25 countries participated and included 2358 patients aged 37.21 ± 11.

View Article and Find Full Text PDF

Background: Persons of African ancestry are thought to carry a higher risk for extrapyramidal syndromes (EPS) in schizophrenia.

Aim: We investigated the phenomenon of spontaneous and treatment-emergent EPS in a sample comprising Xhosa (South Africa) and Yoruba (Nigeria) Africans with first-episode schizophrenia and first exposure to antipsychotics.

Methods: The Extrapyramidal Symptom Rating Scale (ESRS) and a variety of validated tools were used for the assessment of participants before, and two-weekly after treatment with low dose flupenthixol decanoate.

View Article and Find Full Text PDF

In addition to the stresses common to medical school training, medical students in Nigeria face additional peculiar contemporary social problems due to income inequality, poverty, insecurity and political instability. These have a direct impact on their mental health and wellbeing. The aim of this study was to systematically review articles reporting on the epidemiology of psychiatric disorders among medical students in Nigeria.

View Article and Find Full Text PDF

Introduction: A specific clinically relevant staging model for schizophrenia has not yet been developed. The aim of the current study was to evaluate the factor structure of the PANSS and develop such a staging method.

Methods: Twenty-nine centers from 25 countries contributed 2358 patients aged 37.

View Article and Find Full Text PDF

Background: Specific phobia (SP) is a relatively common disorder associated with high levels of psychiatric comorbidity. Because of its early onset, SP may be a useful early marker of internalizing psychopathology, especially if generalized to multiple situations. This study aimed to evaluate the association of childhood generalized SP with comorbid internalizing disorders.

View Article and Find Full Text PDF

Background: Depressive disorders are common among those with bipolar affective disorder (BAD) and may necessitate the use of antidepressants. This has been suggested to precipitate manic episodes in some patients.

Objectives: This study aims to determine the prevalence of and factors associated with manic switch in patients with BAD being treated with antidepressants.

View Article and Find Full Text PDF

Background: Traditional and faith healers constitute an important group of complementary and alternative mental health service providers (CAPs) in sub-Sahara Africa. Governments in the region commonly express a desire to integrate them into the public health system. The aim of the study was to describe the profile, practices and distribution of traditional and faith healers in three sub-Saharan African countries in great need for major improvements in their mental health systems namely Ghana, Kenya and Nigeria.

View Article and Find Full Text PDF

Information about patterns of expression of neurological soft signs (NSS) in schizophrenia among individuals belonging to the same genetic ancestry may provide new insight for the understanding of the disease's genetic functions. This study aimed to investigate whether patterns of NSS expression in first episode schizophrenia are comparable in populations with dissimilar genetic ancestry. A sample of 207 patients with first episode schizophrenia were examined using the Neurological Evaluation Scale before they were exposed to anti-psychotics.

View Article and Find Full Text PDF

Very little is known about the relationship between spontaneous and treatment-induced motor syndromes in Africans with first episode schizophrenia. We investigated the association between spontaneous NSS and EPS, with treatment-induced EPS in a homogenous sample of Black Africans with first episode schizophrenia. We examined Xhosa (South Africa) and Yoruba (Nigeria) patients, using the Neurological Evaluation Scale and extrapyramidal symptoms scale before and at 3 months after exposure to low dose flupenthixol decanoate.

View Article and Find Full Text PDF

Psychotic experiences (PEs) are associated with a range of mental and physical disorders, and disability, but little is known about the association between PEs and aspects of health-related quality of life (HRQoL). We aimed to investigate the association between PEs and five HRQoL indicators with various adjustments. Using data from the WHO World Mental Health surveys (n = 33,370 adult respondents from 19 countries), we assessed for PEs and five HRQoL indicators (self-rated physical or mental health, perceived level of stigma (embarrassment and discrimination), and social network burden).

View Article and Find Full Text PDF

Sexual functioning has received little attention as an important aspect of patient care for those suffering from schizophrenia. In Nigeria, cultural and religious factors often prevent patients from talking with their clinician about their sexual life. The aim of our study was to assess the frequency and nature of sexual dysfunction in patients with schizophrenia and assess the determinants of sexual dysfunction in such patients.

View Article and Find Full Text PDF

Background: Psychotic disorders are a group of severe mental disorders that cause considerable disability to sufferers and a high level of burden to families. In many low- and middle-income countries (LMIC), traditional and faith healers are the main providers of care to affected persons. Even though frequently canvassed as desirable for improved care delivery, collaboration between these complementary alternative health providers (CAPs) and conventional health providers has yet to be rigorously tested for feasibility and effectiveness on patient outcomes.

View Article and Find Full Text PDF

We examined the scope of collaborative care for persons with mental illness as implemented by traditional healers, faith healers, and biomedical care providers. We conducted semistructured focus group discussions in Ghana, Kenya, and Nigeria with traditional healers, faith healers, biomedical care providers, patients, and their caregivers. Transcribed data were thematically analyzed.

View Article and Find Full Text PDF

Objective: Over half of patients with psychiatric disorders are first seen by primary care physicians before referral to the psychiatrist. An efficient referral system is, therefore, important to offering quality care to such patients. Communication between physicians is often sub-optimal and referral letters to specialists sometimes provide inadequate information.

View Article and Find Full Text PDF

Objective: This paper addresses price elasticity of demand (PED) in a region where most patients make payments for consultations out of pocket. PED is a measure of the responsiveness of the quantity demanded of goods or services to changes in price. The study was done in the context of an outpatient psychiatric clinic in a sub -Saharan African country.

View Article and Find Full Text PDF

Background: In order to facilitate case identification of incident (untreated and recent onset) cases of psychosis and controls in three sites in India, Nigeria and Trinidad, we sought to understand how psychoses (or madness) were conceptualized locally. The evidence we gathered also contributes to a long history of research on concepts of madness in diverse settings.

Methods: We conducted focus group discussions and individual interviews to collect information about how informants in each site make sense of and respond to madness.

View Article and Find Full Text PDF