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Objective@#This narrative review aims to provide a comprehensive assessment of the existing literature on the relationship between hypnotics and dementia, considering both potential link and inconclusive or lack of association. @*Methods@#Data from studies that investigate the association between hypnotic medications and dementia were reviewed. Studies included both cohort studies and systematic reviews, participants with various type of dementia and hypnotics including benzodiazepines (BZDs) and Z-drugs (ZDs). @*Results@#The existing literatures presents conflicting evidence regarding the association between hypnotics, including BZDs and ZDs, and the risk of dementia. Some studies suggest a potential link between prolonged use of hypnotics and an increased risk of dementia. However, other studies indicate inconclusive or lacking evidence regarding this association. Factors such as study design, sample characteristics, and control of confounding variables contribute to the variability in findings. @*Conclusion@#The relationship between hypnotics and dementia remains complex and controversial. While some studies suggest a potential association, others find inconclusive or conflicting evidence. Future research should focus on addressing methodological limitations, considering classifying dementia subtypes, and try to adjust medication lag time.
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Objective@#We investigated the differences in suicidality between young people and older adults with depression over the course of 12-week naturalistic treatment with antidepressants. @*Methods@#A total of 565 patients who had moderate to severe depression (Hamilton Depression Rating Scale [HAM-D] score ≥14) and significant suicidal ideation (Beck Scale for Suicide Ideation [SSI-B] score ≥6) were recruited from 18 hospitals. Participants were classified into two groups: the younger group (13–24 years of age, n=82) and the older group (≥25 years of age, n=483). Total scores over time on the SSI-B, HAM-D, and Hamilton Anxiety Rating Scale (HAM-A) were assessed and compared between the two groups. @*Results@#At baseline, the younger group had lower HAM-D scores (21.0 vs. 22.2; p=0.028) but higher SSI-B scores (19.4 vs. 15.6; p<0.001) compared with the older group. The overall 12-week proportion of patients with resolved suicidality was 44.1% in the younger group and 69.2% in the older group. Although the improvement in the HAM-D and HAM-A scores did not differ between the groups, suicidal ideation in the younger group remained more severe than in the older group throughout the treatment. The ratio of the subjects who achieved HAM-D remission or response but did not achieve SSI-B remission was significantly higher in the younger group than in the older group. @*Conclusion@#These data suggest that in depressed youths, suicide risk is a serious concern throughout the course of depression even when favorable treatment outcomes are obtained.
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Objective@#Antipsychotic drugs are known as the major cause of non-neoplastic hyperprolactinemia. This study aimed to investigate the levels of serum prolactin depending on the use of antipsychotic drugs in patients through the Clinical Data Warehouse (CDW). @*Methods@#We conducted a cohort search in the CDW application and got 260 patients’ medical records diagnosed with schizophrenia, schizotypal and delusional disorders, manic episodes, and bipolar affective disorders who were taking one of risperidone, blonanserin, amisulpride, and olanzapine. After that, we reviewed the medical data and used the ANCOVA analysis and the post hoc test to compare serum prolactin levels among four antipsychotic drug groups. @*Results@#Among the 117 subjects included in the analysis, the mean serum prolactin level was 64.6 ± 54.6 ng/ml. Serum prolactin levels were significantly higher in subjects taking risperidone or amisulpride compared to blonanserin and olanzapine. The female subjects who took blonanserin, olanzapine, and risperidone had significantly higher prolactin levels, but there was no difference in serum prolactin levels between sex in the subjects who took amisulpride. @*Conclusion@#This study suggests the need for regular monitoring of serum prolactin levels in patients who are taking antipsychotics, especially in female patients. And we showed that there is a possibility to conduct more effective and simpler big data research using the CDW. Further studies on the subjects with controlled confounding variables and larger sample groups are needed.
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Objective@#The objectives of this study were to investigate the suicide risk in diabetes patients and evaluate the variations in suicide risk by the duration of diabetes using a large population sample in South Korea. @*Methods@#Data from 6,296 adults in the 2019 Korea National Health and Nutrition Examination Survey were included. The suicidal ideation, suicide plans, and suicidal behavior of diabetes patients were compared to the general population. After classifying the patients into ≤1 year, 2 to 9 years, and ≥10 years of diabetes duration, we evaluated the relationship between the duration of diabetes and the suicide risk. @*Results@#Diabetes patients had higher prevalences of suicidal ideation (9.1%, p<0.001) and suicide plans (3.6%, p<0.001) than the general population. After adjusting for potential confounding factors, suicide plans (adjusted odds ratio [aOR]=2.926, 95% confidence interval [CI]=1.325–6.463) were significantly associated with diabetes. In the 2 to 9 years group of diabetes patients, we found an increase in the risk of suicidal ideation (aOR=2.035, 95% CI=1.129–3.670), suicide plans (aOR=3.507, 95% CI=1.538–7.996), and suicidal behavior (aOR=7.130, 95% CI=2.035–24.978) after adjusting for the covariates. However, no increases in suicide risk were observed ≤1 year and ≥10 years after diabetes diagnosis. @*Conclusion@#In adults, diabetes is associated with an increase in suicide risk. Suicide risk in diabetes patients showed an inverted U-shaped depending upon the duration of diabetes.
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Objective@#Recently data has been accumulated regarding the role of coping strategies in the relationship between stress and sleep quality. Therefore, we set out to identify the mediating effects of coping strategies between stress and sleep quality. @*Methods@#A online-based cross-sectional study was performed using the Perceived Stress Scale-10, the Pittsburgh Sleep Quality Index, and a simplification of the 60-item Coping Orientation to Problems Experienced (Brief COPE) inventory in the nonclinical adult sample. The 24 items of Brief COPE were categorized into four factors (social support, problem solving, avoidance, positive thinking). Then, we used the PROCESS macro to conduct the multiple mediation analysis for the four coping styles as potential mediators in the relationship between stress and sleep quality, and an additional subgroup analysis was examined to identify a gender difference for the mediation effect. @*Results@#As a group, four coping styles mediated significantly the association between perceived stress and poor sleep quality. And avoidance has maintained its significance thought all regression analyses. Finally, this results remained as same in the females. @*Conclusion@#The effect of perceived stress on poor sleep quality was mediated by coping strategies, especially by avoidance. Thus, further research should consider the coping styles of individuals to reduce the influence of stress on sleep quality.
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Background@#This study aimed to assess the clinical characteristics of patients with major depressive disorder who were rehospitalized within 1 year and to determine whether the 1-year rehospitalization rate varied depending on the type of medication and treatment method. @*Methods@#Clinical characteristics of 531 patients hospitalized for major depressive disorder were assessed. The use and type of antidepressants, antipsychotics, mood stabilizers, and hypnotics were also evaluated. @*Results@#Of the 531 subjects, 68 (12.8%) were rehospitalized within a year. The number of past depressive episodes (1.56±2.67 vs. 0.90±1.18) (p=0.048) and the number of previous psychiatric hospitalizations (0.82±1.93 vs. 0.29±0.83 times) (p=0.029) were high in the 1-year rehospitalization group. The rate of family history of mood disorder (25.0% vs. 13.6%) (p=0.014) and the rate of comorbid personality disorder (16.2% vs. 8.6%) (p=0.049) were also high in the 1-year rehospitalization group. Multiple logistic regression analysis showed that the number of previous psychiatric hospitalizations affected the rate of 1-year rehospitalization (p=0.003). @*Conclusion@#The number of previous psychiatric hospitalizations could be used to predict rehospitalizations of patients with major depressive disorder within 1 year. In addition, family history of mood disorders and comorbidity of personality disorders may affect rehospitalization of such patients.
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Objective@#Sleep affects systemic inflammation and amyloid deposition, and sleep disturbance is known to be a risk factor for cognitive decline. To date, literatures on the relationship between peripheral inflammatory markers and sleep in Alzheimer’s de-mentia and mild cognitive impairment patients have been scarce. The aim of this study was to determine the correlation between sleep and C-reactive protein (CRP) in Alzheimer’s dementia and amnestic mild cognitive impairment patients. @*Methods@#A total of 81 patients were divided in to four groups: amyloid negative healthy control, amyloid negative amnestic mild cognitive impairment, amyloid positive amnestic mild cognitive impairment, and amyloid positive Alzheimer’s dementia.Demographic data and cognitive measurement through the Consortium to Establish a Registry for Alzheimer’s Disease were conducted. Amyloid positivity status was attained through positron emission tomography scans using [18F]-flutemetamol. The quality of sleep was evaluated by the sleep item of Korean Neuropsychiatric Inventory (K-NPI-SLEEP), and peripheral blood tests were conducted to measure CRP. @*Results@#There was no statistically difference in CRP levels or K-NPI-SLEEP scores among four groups. Moreover, there was no association between K-NPI-SLEEP and CRP in four groups. @*Conclusion@#Since K-NPI-SLEEP score shows overall, subjective sleep problems, further follow-up studies in consideration for objective sleep studies to unravel the relationship of peripheral inflammatory markers and sleep in amnestic mild cognitive impairment and Alzheimer’s dementia patients.
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Background@#The purpose of this study was to measure several mental health variables according to HbA1c level and examine their relationship among diabetic patients. @*Methods@#Total 89 outpatients who attended diabetes education program at St. Vincent’s Hospital, The Catholic University of Korea College of Medicine, were enrolled this study. The Beck Depression Inventory (BDI), State-Trait Anxiety Inventory, Stress Response Inventory (SRI), abbreviated version of World Health Organization Quality of Life assessment instrument (WHOQOL-BREF), Insomnia Severity Index, and Epworth Sleepiness Scale (ESS) were administered to all patients. Significant differences between groups were assessed by t-test and chi-squared test. Pearson correlation and multiple linear regression analyses were used to identify the variables that affect HbA1c levels. @*Results@#The well-controlled group had a significantly lower BDI score than the poorly controlled group. The wellcontrolled group also showed significantly lower SRI and ESS. HbA1c, BDI, SRI, and ESS were positively correlated. Duration and BDI were the only variables affecting HbA1c levels. @*Conclusion@#Emphasis should be given to the identification and management of mental health problems, including especially depressive symptoms in patients with diabetes.
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OBJECTIVES@#The purpose of this study was to investigate the distinctive features of bodily panic symptoms and the predisposing conditions in Korean patients with panic disorder.@*METHODS@#This was a retrospective chart review study and the data were collected from twelve university-affiliated hospitals in Korea. The patients selected met the diagnostic criteria for panic disorder, were older than 20 years of age, and had initially visited a psychiatry department. The assessments included the chief complaints related to bodily panic symptoms, recent stressors, recent history of alcohol and sleep problems, and time to visit an outpatient clinic.@*RESULTS@#A total of 814 participants were included in the study. The most commonly experienced symptoms were cardiovascular and respiratory symptoms, which were observed in 63.9% and 55.4% of participants, respectively. Just before the onset of a panic attack, 25.6% of participants experienced sleep-related problems. Episodic binge drinking was also frequently observed (13.2%) and was more prevalent in men than in women (22.6% vs. 4.9%, p<0.001). About 75% of participants experienced stressful life events just before panic onset. Work-related issues were more prevalent in men than in women (22.0% vs. 13.4%, p=0.001). Family-related issues (4.8% vs. 14.1%, p<0.001) and conflict with a spouse or partner (4.0% vs.11.7%, p<0.001) were more prominent in women than in men.@*CONCLUSION@#Our results suggest that cardiovascular symptoms are the most common bodily panic symptoms in Korean patients. Our results suggest that a substantial portion of the Korean patients experienced stressful life events, sleep problems, and/or episodic binge drinking just before the onset of panic disorder.
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OBJECTIVE: This study aimed to assess the anxiety and depression in patients undergoing hematopoietic stem cell transplantation (HSCT). METHODS: Eighty-seven adult patients with various hematologic diseases, who were scheduled to receive autologous or allogeneic HSCT, were enrolled. The M.D. Anderson Symptom Inventory and the Hospital Anxiety Depression Scale were applied prospectively at hospital admission (D-14), on the day of transplantation (D day), and at 7 (D7) and 14 days (D14) after transplantation. RESULTS: The severity of both anxiety and depressive symptoms increased over time, with a peak at D7, and then showed a downturn at D14. Physical distresses also started with mild intensity at base line, which were continuously aggravated until D7, and then a partial recovery afterwards. Approximately, 52% of the participants had significantly high anxiety or depression before the start of HSCT. The occurrence of aggravation of pain, nausea, shortness of breath, and lack of appetite was associated with the development of anxiety during isolation period. The patients with significant baseline anxiety had higher scores on fatigue and shortness of breath items at D7 compared to those without. CONCLUSION: Our finding suggests the importance of psychiatric approaches, including preventive measures, for the patients undergoing HSCT.
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Adult , Humans , Anxiety , Appetite , Depression , Dyspnea , Fatigue , Hematologic Diseases , Hematologic Neoplasms , Hematopoietic Stem Cell Transplantation , Hematopoietic Stem Cells , Hospitalization , Nausea , Prospective StudiesРеферат
OBJECTIVES: We aimed to investigate the discontinuation rate and reasons of doxepin base prescription pattern in insomnia outpatients of psychiatry department of a university hospital. METHODS: 534 patients prescribed doxepin were screened. 201 patients were included and reviewed for their medical records retrospectively. The discontinuation rate and reasons of doxepin after 2 months of prescription were investigated. Patients were divided into three groups according to the prescription patterns. The initial group, prescribed doxepin as the first hypnotic, the add-on group, prescribed doxepin while maintaining existing hypnotics, and the switching group, prescribed doxepin after discontinuation of existing hypnotics. RESULTS: The discontinuation rate after 2 months of prescription of doxepin was 56.2%. There were significant differences in the discontinuation rate among three groups. The initial group had the highest while the add-on group had the lowest (p=0.018). In reasons for discontinuation of doxepin among three groups, lack of efficacy (p < 0.001) and adverse events (p < 0.001) were significantly higher in the add-on group. In the initial group, patient's refusal (p=0.022) and unknown or loss to follow up (p < 0.001) were significantly higher. CONCLUSIONS: The results of this study suggested that add-on is superior than switching method and gradual reduction of existing hypnotics is necessary to maintain doxepin treatment and prevent adverse events. Additional large scale prospective studies are needed to evaluate various factors and risks of discontinuation of doxepin.
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Humans , Doxepin , Follow-Up Studies , Hypnotics and Sedatives , Medical Records , Methods , Outpatients , Prescriptions , Prospective Studies , Retrospective Studies , Sleep Initiation and Maintenance DisordersРеферат
Unfortunately, the corresponding author's affiliation was incorrect in the original publication of this article..
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Previous studies reported some relationships between donepezil treatment and hippocampus in Alzheimer's disease (AD). However, due to methodological limitations, their close relationships remain unclear. The aim of this study is to predict treatment response to donepezil by utilizing the automated segmentation of hippocampal subfields volumes (ASHS) in AD. Sixty four AD patients were prescribed with donepezil and were followed up for 24 weeks. Cognitive function was measured to assess whether there was a response from the donepezil treatment. ASHS was implemented on non-responder (NR) and responder (TR) groups, and receiver operator characteristic (ROC) analysis was conducted to evaluate the sensitivity, specificity, and accuracy of hippocampal subfields in predicting response to donepezil. The left total hippocampus and the CA1 area of the NR were significantly smaller than those of the TR group. The ROC curve analysis showed the left CA1 volumes showed highest area under curve (AUC) of 0.85 with a sensitivity of 88.0%, a specificity of 74.0% in predicting treatment response to donepezil treatment. We expect that hippocampal subfields volume measurements that predict treatment responses to current AD drugs will enable more evidence-based, individualized prescription of medications that will lead to more favorable treatment outcomes.
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Humans , Alzheimer Disease , Area Under Curve , Cognition , Hippocampus , Prescriptions , ROC Curve , Sensitivity and SpecificityРеферат
OBJECTIVES: The Behavioral Activation of Depression Scale (BADS) has been reported to be a valid tool for assessing the different behavioral aspects of depression, such as activation, rumination or avoidance, and functional impairment. The aim of this study was to assess the reliability and validity of the Korean version of BADS (K-BADS). METHODS: A sample of 196 outpatients completed the K-BADS and the data were analyzed for internal consistency and factor structures. An additional 51 outpatients re-filled the K-BADS after two weeks for the test-retest reliability. To test for the validity, the Hospital Anxiety and Depression Scale (HADS), Working Alliance Inventory (WAI), Drug Attitude Inventory-10 (DAI-10), and Mindfulness Attention Awareness Scale (MAAS) were administered. RESULTS: Internal consistency of K-BADS was good (Cronbach's alpha=0.843) and principal component factor analysis revealed the four-factor structure. The K-BADS showed a reasonable test-retest reliability (r=0.863, p<0.001). The total score of K-BADS correlated significantly with the total scores of the HADS depression (r=−0.694) and HADS anxiety (r=−0.681). No correlations were found between the K-BADS and the K-WAI (r=0.170) and between the K-BADS and the K-DAI-10 (r=0.311). CONCLUSION: The K-BADS is a reliable and valid instrument for measuring the behavioral activation for depression in Korean patients with depressive symptoms.
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Humans , Anxiety , Depression , Mindfulness , Outpatients , Reproducibility of ResultsРеферат
Parkinson's disease dementia (PDD) is notorious for its debilitating clinical course and high mortality rates. Consequently, various attempts to investigate predictors of cognitive decline in Parkinson's disease (PD) have been made. Here we report a case of a 75-year-old female patient with PD who visited the clinic with complaints of recurrent visual hallucinations and cognitive decline, whose symptoms were ameliorated by the titration of rivastigmine. Imaging results showed pronounced diffuse cortical amyloid deposition evidenced by 18F-florbetaben amyloid positron emission tomography (PET) imaging. This observation suggests that pronounced amyloid deposition and visual hallucinations in PD patients could be clinically significant predictors of cognitive decline in PD patients. Future research should concentrate on accumulating more evidence for possible predictors of cognitive decline and their association with PD pathology that can enable an early intervention and standardized treatment in PDD patients.
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Aged , Female , Humans , Amyloid , Dementia , Early Intervention, Educational , Hallucinations , Mortality , Parkinson Disease , Pathology , Plaque, Amyloid , Positron-Emission Tomography , RivastigmineРеферат
OBJECTIVE: The present study aimed to evaluate the efficacy of low frequency (LF) repetitive transcranial magnetic stimulation (rTMS) over the right dorsolateral prefrontal cortex (DLPFC) for the treatment of obsessive-compulsive disorder (OCD). METHODS: Twenty-seven patients with treatment resistant OCD were randomly assigned to 3 week either active (n=14) or sham (n=13) rTMS. The active rTMS parameters consisted of 1 Hz, 20-minute trains (1,200 pulses/day) at 100% of the resting motor threshold (MT). OCD symptoms, mood, and anxiety were assessed at baseline and every week throughout the treatment period. RESULTS: A repeated-measures analysis of variance (ANOVA) was used to evaluate changes on the Yale-Brown Obsessive Compulsive Scale (YBOCS). Our results revealed a significant reduction in YBOCS scores in the active group compared with the sham group after 3 weeks. Similarly, a repeated-measures ANOVA revealed significant effect of time and time×group interaction on scores on the Hamilton Depression Rating Scale and the Clinical Global Impression-Severity scale. There were no reports of any serious adverse effects following the active and sham rTMS treatments. CONCLUSION: LF rTMS over the right DLPFC appeared to be superior to sham rTMS for relieving OCD symptoms and depression in patients with treatment-resistant OCD. Further trials with larger sample sizes should be conducted to confirm the present findings.
Тема - темы
Humans , Anxiety , Depression , Obsessive-Compulsive Disorder , Prefrontal Cortex , Sample Size , Transcranial Magnetic StimulationРеферат
OBJECTIVE: The purpose of the study was to compare cortical amyloid deposition using 18F-florbetaben and positron emission tomography (PET) in healthy controls and subjects with amnestic mild cognitive impairment (aMCI) and Alzheimer's disease (AD). METHODS: We investigated 25 patients : 10 age-matched healthy controls, 10 patients with aMCI and 5 with AD. All participants underwent PET after intravenous injection of 300 MBq of 18F-florbetaben. The 90 min post-injection brain PET data were analysed using statistical parametric mapping. RESULTS: When compared to healthy controls, amyloid deposition was significantly higher in frontal lobe medial frontal gyrus, limbic lobe posterior cingulate, parietal lobe precuneus, sub-loba insula, temporal lobe superior temporal gyrus, parietal lobe inferior parietal lobule, temporal lobe middle temporal gyrus, parietal lobe supramarginal gyrus, occipital lobe middle temporal gyrus of patient group (family wise error correction p<0.05). CONCLUSION: These results indicate 18F-florbetaben to be an efficacious β-amyloid-targeted tracer. Subjects with aMCI, AD could be easily differentiated from healthy controls by assessment of the PET data.
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Humans , Alzheimer Disease , Amyloid , Brain , Frontal Lobe , Gyrus Cinguli , Injections, Intravenous , Limbic Lobe , Cognitive Dysfunction , Occipital Lobe , Parietal Lobe , Plaque, Amyloid , Positron-Emission Tomography , Prefrontal Cortex , Temporal LobeРеферат
OBJECTIVE: Sleep problems are a prominent feature in children with attention-deficit/hyperactivity disorder (ADHD) and about 25-43% of ADHD patients were reported to have sleep problems including higher level of nocturnal activity, longer sleep latency, lower sleep efficiency, more frequent night awakenings and shorter total sleep time. However, the association between sleep and ADHD is poorly understood and their relationships to sleep structure are not consistent across studies. The aims of our study were to ascertain the nocturnal sleep disturbances in patients with ADHD by objective measure, polysomnography. METHODS: The subjects were 20 patients with ADHD and 21 control children (6-12 years). We tested them by polysomnography to get sleep variables and compare sleep disturbances. In addition, we tested ADHD group by neurocognitive function test and assessed the correlation between sleep variables and neurocognitive functions in ADHD group. RESULTS: In sleep variables by polysomnography, the total time in bed (509.73+/-24.56 min vs. 490.51+/-20.71 min, p=0.01), sleep latency (21.30+/-19.33 min vs. 10.72+/-7.26 min, p=0.031) and limb movement arousal (6.56+/-2.19 /hr vs. 5.98+/-1.38 /hr, p=0.043) were significantly increased in patients with ADHD compared with controls. And the slow wave sleep (24.59+/-4.73% vs. 28.45+/-5.63%, p=0.023) were significantly decreased in patients with ADHD compared with controls. There were no significant differences in sleep period time and sleep efficiency test. CONCLUSION: The patients with ADHD had more sleep problems and results of this study suggested that they have significantly increased the total time in bed, sleep latency and Limb movement arousal. And in the patients with ADHD, some sleep variables indicated poor sleep quality. However, further studies should repeatedly suggest consistent results about sleep problems in children with ADHD.
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Child , Humans , Arousal , Extremities , PolysomnographyРеферат
OBJECTIVE: The purpose of the study is to compare treatment responses and side effects of antipsychotic medications in hospitalized delirium patients. METHODS: Among delirium patients hospitalized 23 less-sedating agent group and 26 sedating agent group were included in the study. Less sedating agents are haloperidol and risperidone, and sedating agents are olanzapine and quetiapine. All candidates underwent Clinical Global Impression Scale (CGI), Delirium Rating Scale-Revised 98 (DRS-R 98), and Extrapyramidal Symptom Rating Scale during the treatment period. At baseline, 1st day, 2nd day, 3rd day, 4th day, 5th day, 6th day, 7th day, 10th day, and 14th day, we compared treatment responses and side effect profiles between two groups. RESULTS: The remission defined as below 16 score of DRS-R 98, and the remission rate of both group were 78.3% at less-sedating agent group, and 80.8% at sedating agent group. They showed no difference each other. Time to remission of less-sedating group was significantly shorter than sedating group, they were 2.89+/-1.41 days at less-sedating agent group, and 5.76+/-4.45 days at sedating agent group (p=0.015). After 2 days of treatment, less-sedating agent group showed greater decrement of CGI-S score than sedating agent group, the score were 3.22+/-1.20 at less-sedating agent, and 4.00+/-1.22 at sedating agent group (p=0.030). And DRS-R 98 score after 2 days of treatment showed difference between both group, less-sedating agent group was 17.00+/-8.88, and sedating group was 22.72+/-8.49, they were different statistically (p=0.044). The mean dosage of each drugs were haloperidol 1.93 mg, risperidone 0.71 mg, olanzapine 3.75 mg, and quetiapine 46.09 mg. But there were no significant differences of rate of adverse effects. CONCLUSION: There were no differences of total remission rate and rate of adverse effects between two groups for 2 weeks. But less-sedating agent group showed shorter time to remission and shorter duration of medication than sedating agent group. This study suggests that less-sedating agents are more suitable for early days of delirium treatment.
Тема - темы
Humans , Antipsychotic Agents , Delirium , Haloperidol , Hypnotics and Sedatives , Risperidone , Quetiapine FumarateРеферат
OBJECTIVE: This study was designed to investigate the clinical characteristics of patients with major depressive disorder who were rehospitalized within a year in a naturalistic setting at a university hospital. METHODS: Inpatients with major depressive disorder patients were retrospectively investigated. Data on patients' demographic factors, clinical variables-age, sex, education year, socioeconomic state, marital state, illness duration, length of stay, severity of illness, presence of psychotic features, number of past depressive episodes and hospitalization, family history, comorbidity-were collected. Use of antidepressants, antipsychotics, mood stabilizers and hypnotics were investigated. RESULTS: A total of 238 patients participated in the study. No significant differences were observed between one-year rehospitalized group and the non-rehospitalized group in demographic factors and clinical variables except for the number of previous psychiatric hospitalizations. The mean number of previous psychiatric hospitalization was significantly higher in the one-year rehospitalized group than the non-rehospitalized group (0.41+/-0.83 times vs. 0.23+/-0.83 times) (p=0.048). No significant differences in rehospitalized rates were observed among the disparate treatment types. One-year rehospitalization rate was significantly higher in patients who discontinued antidepressants than the patients who continued the antidepressants (15.9% vs. 0%) (p=0.002). CONCLUSION: The present data suggest that the number of previous psychiatric hospitalizations is higher in patients who were rehospitalized within a year and the discontinuation of antidepressant might be an influencing factor. Further controlled studies are recommended to confirm our findings.