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Li W, Tian Y, Chen C, Li H, Chen H, Liu J, Chen X, Tang H, Zhou J, Wang S, Wang X, Cai W, Zhou J. Mapping Violent Behaviors and Psychiatric Symptoms Among Male Psychiatric Inpatients from a Network Perspective. Psychiatr Q 2023; 94:705-719. [PMID: 37831344 DOI: 10.1007/s11126-023-10056-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/02/2023] [Indexed: 10/14/2023]
Abstract
Psychiatric symptoms are common risk factors of violent behaviors among psychiatric patients. This study explored the interrelationship between violence and psychiatric symptoms in male psychiatric inpatients. This is a cross-sectional survey conducted in 2019. All patients admitted to the Male Psychiatry Unit of the Second Xiangya Hospital were consecutively recruited. The presence of five violent behaviors and eleven psychiatric symptoms were collected by reviewing medical records and were included as categorical variable in the network analyses. A total of 673 participants were included. The most central symptoms were "flight of ideas", "property-oriented violence", "emotional high", "verbal violence", "physical violence attempt", and "physical violence" in the network of psychiatric symptoms and violent behaviors. The bridge symptoms connecting violence and psychiatric symptoms were "verbal violence", "property-oriented violence", "hyperbulia", and "emotional high" according to the indices of bridge expected influence. The directed acyclic graph analysis revealed that "emotional high" and "hyperbulia" were the key psychiatric symptoms triggering violence, while "verbal violence" and "property-oriented violence" were the most upstream violent behavior. Verbal and property-oriented violence should be addressed in the risk assessment among male psychiatric inpatients. In addition, emotional high and hyperbulia are the potential treatment targets for violent behaviors.
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Affiliation(s)
- Wen Li
- Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Shanghai Forensic Service Platform, Ministry of Justice, Academy of Forensic Science, Shanghai, 200063, China
| | - Yusheng Tian
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
- Clinical Nursing Teaching and Research Section, The second Xiangya Hospital of Central South University, Changsha, China
| | - Chen Chen
- Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Shanghai Forensic Service Platform, Ministry of Justice, Academy of Forensic Science, Shanghai, 200063, China
| | - Haozhe Li
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
| | - Hui Chen
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
| | - Jiali Liu
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
| | - Xianliang Chen
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
| | - Huajia Tang
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
| | - Jiawei Zhou
- Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Shanghai Forensic Service Platform, Ministry of Justice, Academy of Forensic Science, Shanghai, 200063, China
| | - Shujian Wang
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China
| | - Xiaoping Wang
- Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Shanghai Forensic Service Platform, Ministry of Justice, Academy of Forensic Science, Shanghai, 200063, China
| | - Weixiong Cai
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, the Second Xiangya Hospital of Central South University, Changsha, China.
| | - Jiansong Zhou
- Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Shanghai Forensic Service Platform, Ministry of Justice, Academy of Forensic Science, Shanghai, 200063, China.
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Lauriola M, D'Onofrio G, Ciccone F, Torre AL, Angelillis V, Germano C, Cascavilla L, Greco A. Vascular Schizophrenia-like Psychosis in Older Adults. J Clin Med 2023; 12:4831. [PMID: 37510946 PMCID: PMC10381626 DOI: 10.3390/jcm12144831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/05/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND The aims of this study were to analyze prevalence and severity of vascular risk factors in older patients referred to our clinic due to onset of Very Late-Onset Schizophrenia-Like Psychosis (VLOSLP) and to create a specific phenotype based on pathophysiological insight rather than age of onset. METHODS In a longitudinal study, 103 (M = 39, F = 64; mean age of 80.32 ± 7.65 years) patients were evaluated with cognitive, neuropsychiatric, and functional assessment scales. Blood concentration of hemoglobin (Hb), mean corpuscular volume (MCV), platelets, total protein test (TPT), creatinine, azotemia, glycemia, total cholesterol (TC), triglycerides (TG), uric acid (UA), sodium (Na), potassium (K), chlorine (Cl), calcium (Ca), folate, vitamin B12 (Vit-B12), and homocysteine were measured. Presence/absence of tobacco use, alcohol consumption, psychoactive substance use, hypertension, hyperlipidemia, diabetes mellitus, and history of vascular disease were collected. RESULTS Females were more apathetic than males (NPI-Apathy: p = 0.040). Males had a significantly higher level of Hb (p = 0.019) and UA (p = 0.001), and a lower level of platelets (p = 0.004) and Ca (p = 0.003), and used more tobacco (p = 0.046) and alcohol (p = 0.024) than females. Comparing patients < 80 and ≥80 years, we found differences in frequency of vascular risk factors among men (p = 0.027). In total, 102 patients were treated for psychosis (59.16% of them were using atypical antipsychotics). CONCLUSIONS The results of this study could be useful for a progressive demonstration of the causal relationship between cardiac and cerebral vascular events and VLOSLP.
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Affiliation(s)
- Michele Lauriola
- Complex Unit of Geriatrics, Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Grazia D'Onofrio
- Clinical Psychology Service, Health Department, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Filomena Ciccone
- Clinical Psychology Service, Health Department, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Annamaria la Torre
- Laboratory of Gerontology and Geriatrics, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Valentina Angelillis
- Complex Unit of Geriatrics, Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Carmela Germano
- Complex Unit of Geriatrics, Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Leandro Cascavilla
- Complex Unit of Geriatrics, Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
| | - Antonio Greco
- Complex Unit of Geriatrics, Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013 Foggia, Italy
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Yan H, Li Y, Li S, Zhou C, Wei S, Li J, Zhang XY. Sex differences in the prevalence and clinical correlates of diabetes in Chinese patients with chronic schizophrenia. Heliyon 2023; 9:e14183. [PMID: 36950609 PMCID: PMC10025886 DOI: 10.1016/j.heliyon.2023.e14183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 02/12/2023] [Accepted: 02/24/2023] [Indexed: 03/06/2023] Open
Abstract
Sex differences have been noted in schizophrenia (SCZ) and diabetes mellitus (DM); however, the effect of sex on SCZ patients with DM remains unknown. We aimed to investigate sex differences in the prevalence, demographic and clinical correlates of DM in Chinese patients with chronic SCZ. A total of 988 Han Chinese SCZ patients (male/female: 638/350) were recruited from two psychiatric hospitals in China. We used the Positive and Negative Syndrome Scale (PANSS) to evaluate the psychopathological symptoms of the patients. In addition, serum glucose and lipid levels were assayed. The prevalence of DM in female patients (57/350, 16.29%) was higher than that in male patients (79/638, 12.38%). Binary logistic regression analyses confirmed that the prevalence of DM in female patients was higher than that in male patients (P < 0.001, OR = 4.62, 95% CI = 2.11-10.11). Moreover, female patients had significantly higher positive symptoms than male patients (P = 0.003, OR = 1.08, 95% CI = 1.03-1.14). Further, higher body mass index (BMI) and higher triglyceride (TG) were significantly associated with DM in men (both P < 0.05). Decreased high density lipoprotein (HDL) was significantly associated with DM in both male and female patients (both P < 0.01). Comorbid DM is more common in female SCZ patients, and there are sex-specific correlates of DM in SCZ.
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Affiliation(s)
- Huiming Yan
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Yanzhe Li
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Shen Li
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Chi Zhou
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
| | - Shuochi Wei
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Jie Li
- Laboratory of Biological Psychiatry, Institute of Mental Health, Tianjin Anding Hospital, Mental Health Center of Tianjin Medical University, Tianjin, China
- Corresponding authorTianjin Anding Hospital, Tianjin Medical University, 13 Liulin Road, Hexi District, Tianjin, 300222, China.
| | - Xiang-Yang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
- Corresponding authorInstitute of Psychology, Chinese Academy of Sciences, 16 Lincui Road, Chaoyang District, Beijing, 100101, China.
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Sex and gender differences in symptoms of early psychosis: a systematic review and meta-analysis. Arch Womens Ment Health 2022; 25:679-691. [PMID: 35748930 DOI: 10.1007/s00737-022-01247-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 06/12/2022] [Indexed: 11/02/2022]
Abstract
First-episode psychosis (FEP) can be quite variable in clinical presentation, and both sex and gender may account for some of this variability. Prior literature on sex or gender differences in symptoms of psychosis have been inconclusive, and a comprehensive summary of evidence on the early course of illness is lacking. The objective of this study was to conduct a systematic review and meta-analysis of the literature to summarize prior evidence on the sex and gender differences in the symptoms of early psychosis. We conducted an electronic database search (MEDLINE, Scopus, PsycINFO, and CINAHL) from 1990 to present to identify quantitative studies focused on sex or gender differences in the symptoms of early psychosis. We used random effects models to compute pooled standardized mean differences (SMD) and risk ratios (RR), with 95% confidence intervals (CI), for a range of symptoms. Thirty-five studies met the inclusion criteria for the systematic review, and 30 studies were included in the meta-analysis. All studies examined sex differences. Men experienced more severe negative symptoms (SMD = - 0.15, 95%CI = - 0.21, - 0.09), whereas women experienced more severe depressive symptoms (SMD = 0.21, 95%CI = 0.14, 0.27) and had higher functioning (SMD = 0.16, 95%CI = 0.10, 0.23). Women also had a lower prevalence of substance use issues (RR = 0.65, 95%CI = 0.61, 0.69). Symptoms of early psychosis varied between men and women; however, we were limited in our ability to differentiate between biological sex and gender factors. These findings may help to inform early detection and intervention efforts to better account for sex and gender differences in early psychosis presentation.
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Sex differences in P50 inhibition defects with psychopathology and cognition in patients with first-episode schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2021; 111:110380. [PMID: 34111493 DOI: 10.1016/j.pnpbp.2021.110380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/19/2021] [Accepted: 06/04/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND A large number of studies have shown that the pathophysiology of schizophrenia may be involved in sensory gating that appears to be P50 inhibition. However, few studies have investigated the relationship between clinical symptoms, cognitive impairment and sensory gating disorders in patients with first-episode schizophrenia. The purpose of this study was to explore the sex differences in the relationship between clinical symptoms, cognitive impairment and P50 inhibition defects in patients with first-episode schizophrenia, which has not been reported. METHODS 130 patients with first-episode schizophrenia (53 males and 77 females) and 189 healthy controls (87 males and 102 females) participated in the study. Positive and Negative Syndrome Scale (PANSS) was used to evaluate the patients' psychopathological symptoms, and the 64-channel electroencephalogram (EEG) system was used to record the P50 inhibition. RESULTS Male patients had higher PANSS negative symptom, general psychopathology, cognitive factor and total scores than female patients (all p < 0.01). The S1 amplitude was smaller in male than female patients (all p < 0.05). Multiple regression analysis showed that in male patients, S1 latency was contributor to negative symptoms, while S1 latency, S2 latency, age, and smoking status were contributors to cognitive factor (all p < 0.05). In female patients, no P50 component was found to be an independent contributor to PANSS scores (all p > 0.05). CONCLUSIONS Our results indicate that there is a sex difference in the relationship between clinical symptoms, cognitive impairment and P50 inhibition defects in Chinese Han patients with first-episode schizophrenia.
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Evaluation of an educational wellness program by sex differences in community-dwelling Japanese patients with schizophrenia. Arch Psychiatr Nurs 2021; 35:450-456. [PMID: 34561058 DOI: 10.1016/j.apnu.2021.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 05/10/2021] [Accepted: 06/12/2021] [Indexed: 11/22/2022]
Abstract
This study was a 24-week non-randomized controlled trial aimed at investigating the effects of lifestyle education by sex in patients with schizophrenia. The data was collected and analyzed for 75 subjects at five facilities in Aomori, Japan. Mean weight and BMI decreased in both biologically male and female subjects over a 24-Week study period in the Intervention group, but were maintenance or increase in the control Group. Although, when compared with the control group by ANCOVA (Analysis of Covariance), there were significant differences in body weight, BMI, and body fat percentage in the biologically male participants in the Intervention group, but not in the females. For the biologically males in the Intervention group, sex differences were speculated to affect weight loss strategies, such as using a pedometer to incorporate walking into their daily routine. Thus, when implementing lifestyle improvement education program, it is recommended to implement a program that considers sex differences.
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Yeh TP, Lin YW, Liu HY, Yang TC, Yen WJ, Ma WF. Gender Differences in the Attitudes of Parents Living with Adult Children with Schizophrenia. Healthcare (Basel) 2021; 9:healthcare9070836. [PMID: 34356215 PMCID: PMC8306192 DOI: 10.3390/healthcare9070836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/28/2021] [Accepted: 06/28/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND This paper explored the gender differences in the attitudes of parents toward taking care of their adult daughters or sons with schizophrenia, and focused on how parents define and think about the roles of their children, and how they cope with fulfilling the expected roles. METHODS Qualitative research design and purpose sampling were used to enroll parents who had adult patients with schizophrenia at a medical center in central Taiwan. Semi-structured in-depth interviews were conducted and content analysis was used to analyze the data. RESULTS Seven main themes emerged from the data provided by ten parents living with adult children with schizophrenia. Three themes that focused on gender difference are listed: parents continue to expect their sons with schizophrenia to carry on the family name; society as a whole expects males to be the "head of the family"; male family members are supposed to assume the responsibility of caring for siblings with schizophrenia. CONCLUSIONS The results of the study could help clinical professionals to understand and have greater empathy with regard to the difficulties for families and the concerns of parents taking care of their children with schizophrenia in the specific context of Chinese culture, and to provide more efficient and responsive assistance.
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Affiliation(s)
- Tzu-Pei Yeh
- School of Nursing, China Medical University, Taichung 406040, Taiwan;
- Nursing Department, China Medical University Hospital, Taichung, 404332, Taiwan
| | - Ying-Wen Lin
- Department of Nursing, National Cheng Kung University Hospital Dou-Liou Branch, Yunlin 701401, Taiwan;
| | - Hsing-Yu Liu
- Department of Nursing, Tsaotun Psychiatric Center, Ministry of Health and Welfare, Nantou 54249, Taiwan;
| | - Tzu-Ching Yang
- Department of Nursing, Changhua Christian Hospital, Changhua 53336, Taiwan;
| | - Wen-Jiuan Yen
- Department of Nursing, Chung-Shan Medical University, Taichung 40201, Taiwan;
| | - Wei-Fen Ma
- School of Nursing, China Medical University, Taichung 406040, Taiwan;
- Nursing Department, China Medical University Hospital, Taichung, 404332, Taiwan
- Program for Health Science and Industry, China Medical University, Taichung 406404, Taiwan
- Correspondence: ; Tel.: +886-04-2205-3366 (ext.7107); Fax: +886-04-2205-3748
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Shi H, Guan XN, Liu DY, Zhu L, Wu ZW, Luo GZ, Wang J, Xiu MH, Zhang XY. Sex-specific Association of Antipsychotic-induced Weight Gain and Treatment Response for Antipsychotic-Naive First Episode Schizophrenia Patients: A Prospective 8-week Longitudinal Study. PHARMACOPSYCHIATRY 2021; 54:68-74. [PMID: 33626593 DOI: 10.1055/a-1353-6544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Patients with antipsychotic-naïve first-episode (ANFE) schizophrenia (SZ) can help clarify many confounding factors in determining sex differences in antipsychotic drug induced weight gain and its association with symptom improvement. METHODS This 8-week longitudinal trial of ANFE patients with SZ enrolled 526 patients and 313 healthy controls. We evaluated bodyweight and the efficacy of antipsychotics on the Positive and Negative Syndrome Scale (PANSS) at baseline and at the end of week 8. RESULTS Males and females after treatment showed no sex difference in weight gain, BMI increase, and percentage of weight gain. However, at baseline, male patients had more positive symptoms than female patients, and decreases in positive symptoms, general psychopathology, and total PANSS scores were less in male than female patients. Adjusting for confounding factors using multiple linear regression confirmed that weight gain was significantly associated with these decreases in PANSS symptoms only in men not women. CONCLUSIONS The relationship between weight gain and symptom reduction after 8 weeks of antipsychotic treatment exists only in male patients with ANFE SZ and not in female patients.
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Affiliation(s)
- Hui Shi
- Department of Clinical Psychology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xiao Ni Guan
- Peking University Hui Long Guan Clinical Medical School, Beijing Hui Long Guan Hospital, Beijing, China
| | - Dian Ying Liu
- Department of Psychiatry, The Third People's Hospital of Ganzhou, Ganzhou, Jiangxi, China
| | - Lin Zhu
- Department of Psychiatry, The Third People's Hospital of Ganzhou, Ganzhou, Jiangxi, China
| | - Zhi Wei Wu
- Department of Psychiatry, Shenzhen Kangning Hospital, Shenzhen, Guangdong, China.,Shenzhen Mental Health center. Shenzhen, Guangdong, China
| | - Guo Zhi Luo
- Department of Psychiatry, Shenzhen Kangning Hospital, Shenzhen, Guangdong, China.,Shenzhen Mental Health center. Shenzhen, Guangdong, China
| | - Jun Wang
- Peking University Hui Long Guan Clinical Medical School, Beijing Hui Long Guan Hospital, Beijing, China
| | - Mei Hong Xiu
- Peking University Hui Long Guan Clinical Medical School, Beijing Hui Long Guan Hospital, Beijing, China
| | - Xiang Yang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
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Sile L, Bezina K, Kvartalovs D, Erts R, Kikuste S, Sapele I, Rancans E. Naturalistic follow-up study of rehospitalization rates and assigned disability status of patients with first-episode schizophrenia spectrum psychosis in South East Latvia: preliminary results. Nord J Psychiatry 2021; 75:87-96. [PMID: 32729764 DOI: 10.1080/08039488.2020.1799429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Patients with first-episode schizophrenia spectrum psychosis (FEP) are at risk of not visiting an out-patient psychiatrist and are assigned disability status within a short period after diagnosis. OBJECTIVE The aim of this study was to conduct a naturalistic follow-up of FEP patients to explore their use of mental healthcare services and the rate of assigned disability status after FEP. METHODS This was the first study in Latvia to include all consecutive patients with FEP admitted to the largest regional hospital in South East Latvia, Daugavpils Psychoneurological Hospital (DPNH). Patients received standard treatment in a real-world environment. The mean follow-up time was 33 months (Min = 20 months, Max = 40 months). RESULTS From the 94 consecutive FEP patients admitted to DPNH (1 January 2016 to 31 December 2017), 68 participated and provided informed consent to be followed up. During the first 12 months after discharge from the acute psychiatric ward, 23% (n = 14) never visited a psychiatrist, and 6.5% (n = 4) had a single visit to get prescription for medication. Furthermore, 36.1% (n = 22) had a rehospitalization during the first 12 months. At the end of follow-up period, 34.4% (n = 21) of patients were assigned disability status within a median time of 8 months (IQR 4.5‒20.0). CONCLUSION Approximately, one-third of patients did not continue treatment as out-patients after FEP. One-third of FEP patients were assigned disability status. We suggest that Latvia needs improved treatment options for FEP patients, such as early intervention.
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Affiliation(s)
- Liene Sile
- Department of Doctoral Studies, Riga Stradins University, Riga, Latvia.,Department of Mental Health Care, Daugavpils Psychoneurological Hospital, Daugavpils, Latvia
| | - Karina Bezina
- Department of Mental Health Care, Daugavpils Psychoneurological Hospital, Daugavpils, Latvia
| | - Dmitrijs Kvartalovs
- Department of Mental Health Care, Daugavpils Psychoneurological Hospital, Daugavpils, Latvia
| | - Renars Erts
- Faculty of Medicine, University of Latvia, Riga, Latvia
| | - Sarmite Kikuste
- Department of Mental Health Care, Daugavpils Psychoneurological Hospital, Daugavpils, Latvia
| | - Inna Sapele
- Department of Mental Health Care, Daugavpils Psychoneurological Hospital, Daugavpils, Latvia
| | - Elmars Rancans
- Department of Psychiatry and Narcology, Riga Stradins University, Riga, Latvia
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Giordano GM, Bucci P, Mucci A, Pezzella P, Galderisi S. Gender Differences in Clinical and Psychosocial Features Among Persons With Schizophrenia: A Mini Review. Front Psychiatry 2021; 12:789179. [PMID: 35002807 PMCID: PMC8727372 DOI: 10.3389/fpsyt.2021.789179] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/03/2021] [Indexed: 01/10/2023] Open
Abstract
An extensive literature regarding gender differences relevant to several aspects of schizophrenia is nowadays available. It includes some robust findings as well as some inconsistencies. In the present review, we summarize the literature on gender differences in schizophrenia relevant to clinical and social outcome as well as their determinants, focusing on clinical variables, while gender differences on biological factors which may have an impact on the outcome of the disorder were not included herewith. Consistent findings include, in male with respect to female patients, an earlier age of illness onset limited to early- and middle-onset schizophrenia, a worse premorbid functioning, a greater severity of negative symptoms, a lower severity of affective symptoms and a higher rate of comorbid alcohol/substance abuse. Discrepant findings have been reported on gender differences in positive symptoms and in social and non-social cognition, as well as in functional outcome and rates of recovery. In fact, despite the overall finding of a more severe clinical picture in males, this does not seem to translate into a worse outcome. From the recent literature emerges that, although some findings on gender differences in schizophrenia are consistent, there are still aspects of clinical and functional outcome which need clarification by means of further studies taking into account several methodological issues.
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Affiliation(s)
| | - Paola Bucci
- Department of Psychiatry, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Armida Mucci
- Department of Psychiatry, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Pasquale Pezzella
- Department of Psychiatry, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Silvana Galderisi
- Department of Psychiatry, University of Campania Luigi Vanvitelli, Naples, Italy
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Gao J, Xiu MH, Liu DY, Wei CW, Zhang X. Interactive effect of MTHFR C677T polymorphism and sex on symptoms and cognitive functions in Chinese patients with chronic schizophrenia. Aging (Albany NY) 2020; 12:10290-10299. [PMID: 32497019 PMCID: PMC7346048 DOI: 10.18632/aging.103248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/20/2020] [Indexed: 12/23/2022]
Abstract
The etiology of schizophrenia is still unknown, and the MTHFR gene has been shown to be associated with SCZ. Previous studies have shown that patients with schizophrenia exhibit sex differences in symptoms and cognitive function. However, no study has been conducted to investigate the sex difference in the association between C677T polymorphism and symptoms and cognitive impairment in Chinese patients with schizophrenia. The C677T polymorphism was genotyped in 957 patients with schizophrenia and 576 controls. Patients were also rated on the Positive and Negative Syndrome Scale (PANSS) and the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). The results showed that there were significant differences in MTHFR C677T genotype and allele distributions between male patients and male controls (both p<0.05), while there was no significant difference between female patients and female controls (both p>0.05). Further analysis showed that there were significant sex differences in the association between C677T genotype and negative symptoms, immediate memory or attention index score in schizophrenia (p<0.05). This study suggests that the complex interactive effect between MTHFR C677T polymorphism and sex plays an important role in some clinical characteristics of patients with schizophrenia.
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Affiliation(s)
- Jie Gao
- Department of Cardiac Surgery, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China
| | - Mei Hong Xiu
- Beijing HuiLongGuan Hospital, Peking University HuiLongGuan Clinical Medical School, Beijing, China
| | - Dian Ying Liu
- Department of Psychiatry, The Third People's Hospital of Ganzhou, Ganzhou, Jiangxi, China
| | - Chang Wei Wei
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xiangyang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
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Wei CW, Chen YQ, Ma M, Xiu MH, Zhang XY. Sex differences in the association of body mass index with symptoms and cognitive deficits in Chinese patients with chronic schizophrenia. Transl Psychiatry 2020; 10:18. [PMID: 32066717 PMCID: PMC7026182 DOI: 10.1038/s41398-020-0717-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/19/2019] [Accepted: 11/28/2019] [Indexed: 12/17/2022] Open
Abstract
Accumulating studies have revealed gender differences in many aspects of schizophrenia (SZ), including obesity and cognitive function. The relationship between obesity and cognitive impairment in SZ has been studied before; however, the results are inconsistent. This study was designed to examine the sex differences in the relationship between body mass index (BMI) and cognitive deficits in Chinese patients with chronic SZ, which have not been investigated yet. 176 chronic patients with SZ (male/female = 108/68) and 200 controls (male/female = 120/80) were enrolled to compare the sex differences in cognitive functions measured by the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS), BMI, and their associations. The clinical symptoms were evaluated using the positive and negative syndrome scales (PANSS). Our results showed that male patients had lower BMI and more negative symptoms but fewer positive symptoms than female patients (all p < 0.05). However, there was no significant sex difference in RBANS scores. In male patients, BMI was correlated with age of onset, PANSS general psychopathology, total score, negative symptom, together with RBANS language, visuospatial/construction, and attention. Further regression analysis showed that in male patients, BMI was significantly associated with RBANS language, PANSS general psychopathology, PANSS total score, and age of onset, with adjusted R2 = 0.22. These findings revealed significant sex differences in BMI, cognitive dysfunctions and their association in SZ. Nonetheless, these results should only be considered as preliminary because of the cross-sectional design, which will deserve further replication in first-episode patients using a prospective longitudinal design.
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Affiliation(s)
- Chang Wei Wei
- grid.24696.3f0000 0004 0369 153XDepartment of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, P. R. China
| | - Ying Qi Chen
- grid.24696.3f0000 0004 0369 153XDepartment of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, P. R. China
| | - Mi Ma
- grid.452792.fQingdao Mental Health Center, Qingdao, P. R. China
| | - Mei Hong Xiu
- Peking University HuiLongGuan Clinical Medical School, Beijing HuiLongGuan Hospital, Beijing, P. R. China.
| | - Xiang Yang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, P. R. China. .,Department of Psychology, University of Chinese Academy of Sciences, Beijing, P. R. China.
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Li W, Yang Y, Hong L, An FR, Ungvari GS, Ng CH, Xiang YT. Prevalence of aggression in patients with schizophrenia: A systematic review and meta-analysis of observational studies. Asian J Psychiatr 2020; 47:101846. [PMID: 31715468 DOI: 10.1016/j.ajp.2019.101846] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/15/2019] [Accepted: 10/15/2019] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Aggression is common in patients with schizophrenia and is clinically significant, but its prevalence is inconsistent across studies. This is a meta-analysis of the prevalence of aggression and its associated factors in patients with schizophrenia. METHODS PubMed, EMBASE, PsycINFO, the Cochrane Library, Medline and Web of Science databases were systematically searched. Studies that reported the prevalence of aggression in patients with schizophrenia using the Modified Overt Aggression Scale (MOAS) were included and analyzed using the random-effects model. RESULTS Fifteen studies with 4855 patients were initially included; of these, 13 studies with 3929 patients were pooled in the final meta-analysis. The pooled prevalence of aggression was 33.3% (95%CI: 21.5%-47.7%); specifically, the estimated prevalence of verbal, property-oriented, auto and physical aggression were 42.6% (95%CI: 17.0%-72.9%), 23.8% (95%CI: 10.1%-46.4%), 23.5% (95%CI: 6.5%-57.7%), and 23.7% (95%CI: 10.4%-45.3%), respectively. Subgroup analyses revealed that different MOAS cut-off values (P < 0.001) and source of patients (inpatients vs. community-dwelling patients) significantly moderated the results (P < 0.001). Meta-regression analyses found that studies published recently reported higher aggression rate, while higher quality assessment score was associated with lower aggression rate (both P < 0.01). CONCLUSIONS This meta-analysis confirmed that aggression is common in schizophrenia patients. Considering the significant clinical risk issues, appropriate treatments and effective management of aggression in this population need to be developed.
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Affiliation(s)
- Wen Li
- Unit of Psychiatry, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China; Center for Cognition and Brain Sciences, University of Macau, Macao SAR, China
| | - Yuan Yang
- Unit of Psychiatry, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China; Center for Cognition and Brain Sciences, University of Macau, Macao SAR, China; Department of Psychiatry and Psychology, Southern Medical University Nanfang Hospital, Guangdong, China
| | - Liu Hong
- Department of Psychiatry, WuZhongpei Memorial Hospital, Guangdong province, China; Graduate School of Guangdong Medical University, Guangdong province, China
| | - Feng-Rong An
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital & the Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Gabor S Ungvari
- University of Notre Dame Australia, Fremantle, Australia; Division of Psychiatry, School of Medicine, University of Western Australia, Perth, Australia
| | - Chee H Ng
- Department of Psychiatry, The Melbourne Clinic and St Vincent's Hospital, University of Melbourne, Richmond, Victoria, Australia
| | - Yu-Tao Xiang
- Unit of Psychiatry, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China; Center for Cognition and Brain Sciences, University of Macau, Macao SAR, China.
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Alberich S, Fernández-Sevillano J, González-Ortega I, Usall J, Sáenz M, González-Fraile E, González-Pinto A. A systematic review of sex-based differences in effectiveness and adverse effects of clozapine. Psychiatry Res 2019; 280:112506. [PMID: 31401291 DOI: 10.1016/j.psychres.2019.112506] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 08/01/2019] [Accepted: 08/02/2019] [Indexed: 12/17/2022]
Abstract
Clozapine is one of the most widely used antipsychotics for treating psychiatric illnesses such as schizophrenia and bipolar disorder. This drug, however, is associated with adverse effects such as weight gain, metabolic syndrome, and blood dyscrasias. The manifestations of mental illness may differ between men and women. Yet, there is little evidence on the influence of sex on treatment response or the occurrence of AEs. To fill this gap of knowledge, we carried out a systematic review of the literature on sex differences in the effectiveness and adverse effects of clozapine. Scant evidence has been published on differences in effectiveness of clozapine between men and women. Indeed, to the best of our knowledge, this issue has only been addressed in a published study. Regarding adverse effects, males have been reported to be more likely to develop metabolic abnormalities such as cholesterol or triglycerides, hypertension, and cardiovascular risk, while females are at a higher risk for gaining weight, developing diabetes, and needing laxatives. Nevertheless, given the scarcity of sex-based studies on this drug, further studies are needed to explore sex-based differences, as the results obtained may be crucial to clinical practice and help improve the quality of life of patients.
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Affiliation(s)
- Susana Alberich
- Biomedical Research Networking Centre in Mental Health (CIBERSAM), BioAraba Research Institute, OSI Araba-University Hospital, Department of Psychiatry, Olaguibel Street 29, 01004, Vitoria, Spain; National Distance Education University Spain (UNED), Vitoria, Spain.
| | - Jessica Fernández-Sevillano
- Biomedical Research Networking Centre in Mental Health (CIBERSAM), BioAraba Research Institute, OSI Araba-University Hospital, Department of Psychiatry, Olaguibel Street 29, 01004, Vitoria, Spain; University of the Basque Country (EHU/UPV), Spain
| | - Itxaso González-Ortega
- Biomedical Research Networking Centre in Mental Health (CIBERSAM), BioAraba Research Institute, OSI Araba-University Hospital, Department of Psychiatry, Olaguibel Street 29, 01004, Vitoria, Spain; National Distance Education University Spain (UNED), Vitoria, Spain
| | - Judith Usall
- Biomedical Research Networking Centre in Mental Health (CIBERSAM), University of Barcelona, Research Unit Parc Sanitari Sant Joan de Déu, Barcelona, Catalonia, Spain
| | - Marga Sáenz
- University of the Basque Country (EHU/UPV), Spain; Hospital Universitario Cruces, Biocruces, Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Bilbao, España
| | | | - Ana González-Pinto
- Biomedical Research Networking Centre in Mental Health (CIBERSAM), BioAraba Research Institute, OSI Araba-University Hospital, Department of Psychiatry, Olaguibel Street 29, 01004, Vitoria, Spain; University of the Basque Country (EHU/UPV), Spain
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15
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Sex difference in association of symptoms and white matter deficits in first-episode and drug-naive schizophrenia. Transl Psychiatry 2018; 8:281. [PMID: 30563964 PMCID: PMC6298972 DOI: 10.1038/s41398-018-0346-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 10/10/2018] [Accepted: 11/25/2018] [Indexed: 11/10/2022] Open
Abstract
Accumulating evidence shows that disruption of white matter (WM) may be involved in the pathophysiology of schizophrenia, even at the onset of psychosis. However, very few studies have explored sex difference in its association with psychopathology in schizophrenia. This study aims to compare sex differences in clinical features and WM abnormalities in first-episode and drug-naive (FEDN) schizophrenia among Han Chinese inpatients. The WM fractional anisotropy (FA) values of the whole-brain were determined using voxel-based diffusion tensor imaging (DTI) in 39 (16 males and 23 females) FEDN patients with schizophrenia and 30 healthy controls (13 males and 17 females) matched for gender, age, and education. Patient psychopathology was assessed using the Positive and Negative Syndrome Scale (PANSS).Our results showed that compared with the controls, the patients showed widespread areas of lower FA, including corpus callosum, brainstem, internal capsule, cingulate, and cerebellum (all adjusted p < 0.01). Further, male patients showed lower FA values in left cingulate (F = 4.92, p = 0.033), but higher scores on the PANSS total, positive, and general psychopathology subscale scores (all p < 0.01) than female patients. Multivariate regression analysis showed that for male patients, FA values in right corpus callosum were positively associated with the PANSS total (beta = 0.785, t = 3.76, p = 0.002) and the negative symptom scores (beta = 0.494, t = 2.20, p = 0.044), while for female patients, FA values in left cingulate were negatively associated with the PANSS positive symptom score (beta = -0.717, t = -2.25, p = 0.041). Our findings indicate sex difference in white matter disconnectivity and its association with psychopathological symptoms in an early course of schizophrenia onset.
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Sumich A, Anderson JD, Howard CJ, Heym N, Castro A, Baker J, Belmonte MK. Reduction in lower-alpha power during Ganzfeld flicker stimulation is associated with the production of imagery and trait positive schizotypy. Neuropsychologia 2018; 121:79-87. [DOI: 10.1016/j.neuropsychologia.2018.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 10/12/2018] [Accepted: 11/05/2018] [Indexed: 11/28/2022]
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Cariaga-Martinez A, Gutiérrez K, Alelú-Paz R. Rethinking schizophrenia through the lens of evolution: shedding light on the enigma. RESEARCH IDEAS AND OUTCOMES 2018. [DOI: 10.3897/rio.4.e28459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Schizophrenia refers to a complex psychiatric illness characterized by the heterogenic presence of positive, negative and cognitive symptoms occurring in all human societies. The fact that the disorder lacks a unifying neuropathology, presents a decreased fecundity of the affected individuals and has a cross-culturally stable incidence rate, makes it necessary for an evolutionary explanation that fully accounts for the preservation of “schizophrenic genes” in the global human genepool, explaining the potential sex differences and the heterogeneous cognitive symptomatology of the disorder and is consistent with the neuropsychological, developmental and evolutionary findings regarding the human brain. Here we proposed a new evolutionary framework for schizophrenia that is consistent with findings presented in different dimensions, considering the disorder as a form of brain functioning that allows us to adapt to the environment and, ultimately, maintain the survival of the species. We focus on the epigenetic regulation of thalamic interneurons as a major player involved in the development of the clinical picture characteristic of schizophrenia.
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Congdon EE. Sex Differences in Autophagy Contribute to Female Vulnerability in Alzheimer's Disease. Front Neurosci 2018; 12:372. [PMID: 29988365 PMCID: PMC6023994 DOI: 10.3389/fnins.2018.00372] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/14/2018] [Indexed: 12/11/2022] Open
Abstract
Alzheimer's disease (AD) is the most common form of dementia, with over 5. 4 million cases in the US alone (Alzheimer's Association, 2016). Clinically, AD is defined by the presence of plaques composed of Aβ and neurofibrillary pathology composed of the microtubule associated protein tau. Another key feature is the dysregulation of autophagy at key steps in the pathway. In AD, disrupted autophagy contributes to disease progression through the failure to clear pathological protein aggregates, insulin resistance, and its role in the synthesis of Aβ. Like many psychiatric and neurodegenerative diseases, the risk of developing AD, and disease course are dependent on the sex of the patient. One potential mechanism through which these differences occur, is the effects of sex hormones on autophagy. In women, the loss of hormones with menopause presents both a risk factor for developing AD, and an obvious example of where sex differences in AD can stem from. However, because AD pathology can begin decades before menopause, this does not provide the full answer. We propose that sex-based differences in autophagy regulation during the lifespan contribute to the increased risk of AD, and greater severity of pathology seen in women.
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Affiliation(s)
- Erin E Congdon
- Neuroscience and Physiology, School of Medicine, New York University, New York City, NY, United States
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Wang Q, Dong X, Wang Y, Li X. Raloxifene as an adjunctive treatment for postmenopausal women with schizophrenia: a meta-analysis of randomized controlled trials. Arch Womens Ment Health 2018; 21:31-41. [PMID: 28849318 DOI: 10.1007/s00737-017-0773-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 08/21/2017] [Indexed: 12/21/2022]
Abstract
The aim of this study is to meta-analytically assess the efficacy and safety of adjunctive raloxifene for postmenopausal women with schizophrenia. Six studies with 440 patients, including 225 (51.14%) patients on raloxifene and 215 (48.86%) on placebo who completed 13.71 ± 5.09 weeks of treatment, were included in this study. Meta-analysis of Positive and Negative Syndrome Scale total scores and positive, negative, and general symptom scores [standard mean difference (SMD) -0.22 to -0.55, 95% confidence interval (CI) -1.01 to -0.02, p = 0.04-0.01; I 2 = 74-79%] revealed an advantage of adjunctive raloxifene treatment over placebo treatment. There was no significant difference regarding discontinuation rate [risk ratio (RR) = 1.38, p = 0.51] and adverse drug reactions (RR = 1.27, p = 0.57) between the two groups. This meta-analysis showed that adjunctive raloxifene appears to be efficacious and safe for postmenopausal women with schizophrenia. Moreover, raloxifene may be efficacious for patients with less severe symptoms. Future studies with a large sample size are needed to confirm these findings.
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Affiliation(s)
- Qi Wang
- Department of Psychiatry, The First Hospital of China Medical University, 155 Nanjingbei Street, Shenyang, Liaoning, 110001, China
| | - Xiaomei Dong
- Department of Psychiatry, The First Hospital of China Medical University, 155 Nanjingbei Street, Shenyang, Liaoning, 110001, China
| | - Yan Wang
- Department of Psychiatry, The First Hospital of China Medical University, 155 Nanjingbei Street, Shenyang, Liaoning, 110001, China
| | - Xiaobai Li
- Department of Psychiatry, The First Hospital of China Medical University, 155 Nanjingbei Street, Shenyang, Liaoning, 110001, China.
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Eugene AR, Masiak J. A pharmacodynamic modelling and simulation study identifying gender differences of daily olanzapine dose and dopamine D2-receptor occupancy. Nord J Psychiatry 2017; 71:417-424. [PMID: 28486094 PMCID: PMC5557349 DOI: 10.1080/08039488.2017.1314011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 03/17/2017] [Accepted: 03/26/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Gender differences in treatment response rates for patients treated with antipsychotics are known. However, the literature lacks a pharmacodynamic model to allow for gender-based clinical trial simulations from modelling parameters for Olanzapine and dopamine D2 receptor occupancy. Thus, the primary aim of this analysis is to test and quantify the effect of gender on the pharmacodynamics of Olanzapine. METHODS Population pharmacodynamic modelling was performed using non-linear mixed effects modelling in MONOLIX, while the Clinical Trial Simulations were performed using R for statistical programming. The pharmacometric analysis is based on a pooled data approach from three clinical studies where patients were diagnosed with schizophrenia and one clinical study where the patients were diagnosed with bipolar disorder. RESULTS Olanzapine D2RO was modelled using an Emax model in a study population of 70 patients. Population pharmacodynamic parameters were estimated to be: Emax = 85.6% (RSE = 3%), ED50-Men = 5.15 mg/day (RSE = 14) and ED50-Women = 2.38 mg/day (RSE = 34%), with the p-value = 0.037 for the gender-stratified ED50 results. CONCLUSION The pharmacometrics analysis and model-based dosing simulations suggest that, in order to achieve 70% D2RO, women require a 10 mg/day dose and men require approximately a 20 mg/day dose of Olanzapine. Further, clinical implications exist suggesting that clinicians should factor patient gender when considering both a starting dose, as well a, a maintenance dose for patients prescribed Olanzapine due to quantifiable gender-differences of striatal dopamine D2 receptor occupancy.
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Affiliation(s)
- Andy R. Eugene
- Division of Clinical Pharmacology, Department of Molecular Pharmacology and Experimental Therapeutics, Gonda 19, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Jolanta Masiak
- Neurophysiology Laboratory, Medical University of Lublin, ul. Gluska 1 (SPSK Nr 1), Lublin 20-439, Poland
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