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    Allan Keter

    Problem Statement. Thyroid disorders are prevalent in western Kenya, but the effects of disorders on thyroid hormones and hematological indices levels have not been documented. Study Population. Patients treated for thyroid disorders at... more
    Problem Statement. Thyroid disorders are prevalent in western Kenya, but the effects of disorders on thyroid hormones and hematological indices levels have not been documented. Study Population. Patients treated for thyroid disorders at the MTRH between January 2008 and December 2011. Objectives. To determine the thyroid hormones and hematological indices levels in thyroid disorders patients at the MTRH, western Kenya. Methodology. A retrospective study in which patient data and stored samples of patients, who presented with thyroid pathologies, underwent thyroidectomy, and histological examinations are done. Thyroid stimulating hormone (TSH), thyroxine (T4), and triiodothyronine (T3) blood levels, white blood cells (WBCs), red blood cells (RBCs), platelet counts, and hemoglobin (Hb) levels were analyzed. Results. Male : female ratio was 1 : 10.9 with female representing 368 (95%). The median age was 41 (IQR: 32–48) with a range of 14–89 years. HHormonal levels for immunological thy...
    Although patients with bipolar disorder have been shown to benefit from psychosocial interventions, the proportion that utilizes these interventions is unknown. We set out to clarify the determinants of psychosocial service utilization in... more
    Although patients with bipolar disorder have been shown to benefit from psychosocial interventions, the proportion that utilizes these interventions is unknown. We set out to clarify the determinants of psychosocial service utilization in adults with bipolar disorder. We investigated psychosocial service utilization among the first 500 patients admitted to the Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD). In the 3 months prior to enrollment in STEP-BD, a majority of the patients (54%) were engaged in at least one psychosocial service modality in addition to pharmacotherapy. In order of decreasing frequency, these were therapy with a psychologist, self-help group, therapy with a social worker, and therapy with another type of provider. Bipolar patients with personality disorders (80% vs 20%, p = 0.0002), alcohol/drug abuse disorders (76% vs 24%, p = 0.0022), and anxiety disorders (60% vs 40%, p = 0.0043) received more psychosocial services than those without. Poorer global functioning also increased the likelihood of receiving services, whereas being married decreased service utilization. Psychosocial service utilization by outpatients with bipolar disorder is strongly linked to greater severity/complexity of illness. Potential moderators, such as insurance status and availability of care, should be examined in future studies.
    Several lines of evidence suggest that ω-3 fatty acids may be important in the pathophysiology, treatment or prevention of bipolar disorder (BD). Electronic and manual searches were conducted in order to review the literature relevant to... more
    Several lines of evidence suggest that ω-3 fatty acids may be important in the pathophysiology, treatment or prevention of bipolar disorder (BD). Electronic and manual searches were conducted in order to review the literature relevant to the etiology and ...
    Objective: Understanding of mood disorders can be enhanced through assessment of temperamental traits. We explored temperamental commonalities and differences among euthymic bipolar (BP) and unipolar (MDD) mood disorder patients, creative... more
    Objective: Understanding of mood disorders can be enhanced through assessment of temperamental traits. We explored temperamental commonalities and differences among euthymic bipolar (BP) and unipolar (MDD) mood disorder patients, creative discipline ...
    Recently, two large, 3-week, randomised, double-blind, placebo-controlled trials using nearly identical protocols demonstrated that monotherapy with carbamazepine extended-release capsules (CBZ-ERC) was effective for the treatment of... more
    Recently, two large, 3-week, randomised, double-blind, placebo-controlled trials using nearly identical protocols demonstrated that monotherapy with carbamazepine extended-release capsules (CBZ-ERC) was effective for the treatment of acute mania in patients with bipolar I disorder. By pooling data from these two trials, a more highly powered analysis of the efficacy and safety of CBZ-ERC in bipolar I disorder could be conducted. Efficacy was assessed with the Young Mania Rating Scale (YMRS), the Clinical Global Impression (CGI)-Severity (CGI-S) scale, the CGI-Improvement (CGI-I) scale and the Hamilton Depression Rating Scale (HDRS). A sub-analysis of the data based on manic versus mixed presentation was performed, as well as sub-analyses by age, sex and ethnicity. Of the 443 randomised patients in the pooled population, 240 completed the studies. Forty-two percent of CBZ-ERC-treated patients did not complete the studies, compared with 50% of placebo-treated patients (p=0.087). Ten percent of patients given CBZ-ERC withdrew because of lack of efficacy, compared with 22% of patients given placebo (p<0.001). At endpoint, CBZ-ERC compared with placebo was associated with significant improvements in mean YMRS total scores in patients experiencing both manic (p<0.0001) and mixed (p<0.01) episodes, using last-observation-carried-forward analyses. CGI-I and CGI-S scores also showed significant improvements from baseline for both manic and mixed patients at endpoint. In patients with mixed episodes, at endpoint there was a mean improvement in HDRS total score of 4.8 points with CBZ-ERC, compared with 2.3 points with placebo (p<0.05). Ninety percent of patients given CBZ-ERC experienced an adverse event, compared with 64% of those patients given placebo. Discontinuation because of adverse events occurred in 10.8% of patients taking CBZ-ERC, compared with 5.5% of patients taking placebo. These results confirm previous findings that CBZ-ERC is effective in the treatment of bipolar I disorder patients with either acute manic or mixed episodes. These data suggest that further randomised controlled studies are warranted to delineate the effect of CBZ-ERC on depressive symptoms in patients with bipolar disorder.
    Suicide is one of the ten leading causes of death in the world, accounting for more than 400,000 deaths annually. The pattern of suicide and the incidence of suicide vary from country to country. Cultural, religious and social values play... more
    Suicide is one of the ten leading causes of death in the world, accounting for more than 400,000 deaths annually. The pattern of suicide and the incidence of suicide vary from country to country. Cultural, religious and social values play some role in suicide. Compared to the ...
    Results: With open olanzapine (15 adjunctive, 10 monotherapy), overall symptom severity (CGI-S) as well as mood elevation (Young Mania Rating Scale), depression (Hamilton and Montgomery-Asberg Depression Rating Scales), and anxiety... more
    Results: With open olanzapine (15 adjunctive, 10 monotherapy), overall symptom severity (CGI-S) as well as mood elevation (Young Mania Rating Scale), depression (Hamilton and Montgomery-Asberg Depression Rating Scales), and anxiety (Hamilton Anxiety Rating ...
    Data are emerging in bipolar disorder regarding mood across phases of the female reproductive life, yet information about mood during the menopausal transition remains limited. The menopausal transition in women without mood disorders is... more
    Data are emerging in bipolar disorder regarding mood across phases of the female reproductive life, yet information about mood during the menopausal transition remains limited. The menopausal transition in women without mood disorders is associated with an increase in depression. This study assesses mood course during the menopausal transition in women with bipolar disorder. We monitored mood episodes in 47 women with bipolar disorder ages 45-55 for 17.0+/-14.0 months with systematic treatment enhancement program for bipolar disorder (STEP-BD) standardized evaluations. Charts were additionally reviewed for menstrual status and menstrual history, as well as mood episode type, duration, frequency and history. During the menopausal transition 68% of women with bipolar disorder experienced at least one depressive episode. Depression (but not mood elevation) episode frequency significantly increased during the menopausal transition compared to reported frequency during patients' reproductive years. History of pre-menstrual and or post-partum mood instability did not predict perimenopausal mood episodes. Women with bipolar disorder experience a high frequency of depressive episodes during perimenopausal years and this frequency appears greater than during prior reproductive years. Prospective controlled studies are needed to better understand the course of mood episodes and to enhance the effectiveness of managing bipolar disorder during the menopausal transition.
    Traditional neuroleptics are often utilized clinically for the management of bipolar disorder. Although effective as antimanic agents, their mood stabilizing properties are less clear. Additionally, their acute clinical side effect... more
    Traditional neuroleptics are often utilized clinically for the management of bipolar disorder. Although effective as antimanic agents, their mood stabilizing properties are less clear. Additionally, their acute clinical side effect profile and long term risk of tardive dyskinesia, particularly in mood disorder patients, portend significant liability. This review focuses on the use of atypical antipsychotics in the treatment of bipolar disorder focusing on clozapine as the prototypical agent. Although, preclinical research and clinical experience suggest that the atypical antipsychotics are distinctly different from typical antipsychotics, they themselves are heterogeneous in profiles of neuropharmacology, clinical efficacy, and tolerability. The early clinical experience of clozapine as a potential mood stabilizer suggests greater antimanic than antidepressant properties. Conversely, very preliminary clinical experience with risperidone suggests greater antidepressant than antimanic properties and some liability for triggering or exacerbating mania. Olanzapine and sertindole are under investigation in psychotic mood disorders. The foregoing agents and future drugs with atypical neuroleptic properties should come to play an increasingly important role, compared to the older classical neuroleptics, in the acute and long term management of bipolar disorder.
    Summary: Previous independent EEG and PET studies suggest that administration of intravenous procaine hydrochloride selectively activates limbic brain structures. To further elucidate procaine's effects and explore the relationship... more
    Summary: Previous independent EEG and PET studies suggest that administration of intravenous procaine hydrochloride selectively activates limbic brain structures. To further elucidate procaine's effects and explore the relationship between quantitative EEG (qEEG) and regional ...
    Bupropion (BUP) may be less likely than other antidepressants to cause switches into mania and rapid cycling, suggesting utility in bipolar disorder.The combination of BUP with the mood-stabilizing anticonvulsants carbamazepine (CBZ) or... more
    Bupropion (BUP) may be less likely than other antidepressants to cause switches into mania and rapid cycling, suggesting utility in bipolar disorder.The combination of BUP with the mood-stabilizing anticonvulsants carbamazepine (CBZ) or valproate (VPA) is a strategy ...
    One emerging hypothesis regarding psychiatric illnesses is that they arise from the dysregulation of normal circuits or neuroanatomical patterns. In order to study mood disorders within this framework, we explored normal metabolic... more
    One emerging hypothesis regarding psychiatric illnesses is that they arise from the dysregulation of normal circuits or neuroanatomical patterns. In order to study mood disorders within this framework, we explored normal metabolic associativity patterns in healthy volunteers as a prelude to examining the same relationships in affectively ill patients (Part II).We applied correlational analyses to regional brain activity as measured with FDG-PET during an auditory continuous performance task (CPT) in 66 healthy volunteers. This simple attention task controlled for brain activity that otherwise might vary amongst affective and cognitive states. There were highly significant positive correlations between homologous regions in the two hemispheres in thalamic, extrapyramidal, orbital frontal, medial temporal and cerebellar areas. Dorsal frontal, lateral temporal, cingulate, and especially insula, and inferior parietal areas showed less significant homologous associativity, suggesting more specific lateralized function. The medulla and bilateral thalami exhibited the most diverse interregional associations. A general pattern emerged of cortical regions covarying inversely with subcortical structures, particularly the frontal cortex with cerebellum, amygdala and thalamus.These analytical data may help to confirm known functional and neuroanatomical relationships, elucidate others as yet unreported, and serve as a basis for comparison to patients with psychiatric illness.
    Background High attrition rates, which occur frequently in longitudinal clinical trials of interventions for bipolar disorder, limit the interpretation of results. Purpose The aim of this article is to present design approaches that... more
    Background High attrition rates, which occur frequently in longitudinal clinical trials of interventions for bipolar disorder, limit the interpretation of results. Purpose The aim of this article is to present design approaches that limited attrition in the Lithium Treatment – Moderate dose Use Study (LiTMUS) for bipolar disorder. Methods LiTMUS was a 6-month randomized, longitudinal multisite comparative effectiveness trial that enrolled bipolar participants who were at least mildly ill. Participants were randomized to either low to moderate doses of lithium or no lithium; other treatments needed for mood stabilization were administered in a guideline-informed, empirically supported, and personalized fashion to participants in both treatment arms. Results Components of the study design that may have contributed to low attrition (16%) among 283 participants randomized included the use of (1) an intent-to-treat design, (2) a randomized adjunctive single-blind design, (3) participant reimbursement, (4) assessment of intent to attend the next study visit (included a discussion of attendance obstacles when intention was low), (5) quality care with limited participant burden, and (6) target windows for study visits. Limitations The relationships between attrition and effectiveness and tolerability of treatment have not been analyzed yet. Conclusions These components of the LiTMUS design may have limited attrition and may inform the design of future randomized comparative effectiveness trials among similar patients and those from other difficult-to-follow populations.
    ... Volume: Volume; Issue: Publication Date: 2011; Pages: S3 - S4; Authors: GS Bloomfield; JW Hogan; A. Keter; E. Sang; EJ Carter; EJ Velazquez; S. Kimaiyo; ISSN: 16800745; Abstract: Hypertension among HIV-seropositive patients in western... more
    ... Volume: Volume; Issue: Publication Date: 2011; Pages: S3 - S4; Authors: GS Bloomfield; JW Hogan; A. Keter; E. Sang; EJ Carter; EJ Velazquez; S. Kimaiyo; ISSN: 16800745; Abstract: Hypertension among HIV-seropositive patients in western Kenya; Read this article. ...
    Background: Treatment-emergent mania is a potential risk when patients with bipolar disorder are treated with antidepressant agents. These subanalyses compare treatment-emergent mania rates in bipolar I depressed patients treated with... more
    Background: Treatment-emergent mania is a potential risk when patients with bipolar disorder are treated with antidepressant agents. These subanalyses compare treatment-emergent mania rates in bipolar I depressed patients treated with olanzapine, placebo, or olanzapine/ ...