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Yagi C, Kimura A, Horii A. Persistent postural-perceptual dizziness: A functional neuro-otologic disorder. Auris Nasus Larynx 2024; 51:588-598. [PMID: 38552422 DOI: 10.1016/j.anl.2023.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/24/2023] [Accepted: 12/27/2023] [Indexed: 05/12/2024]
Abstract
Persistent postural-perceptual dizziness (PPPD) is a functional neuro-otologic disorder that is the most frequent cause of chronic vestibular syndrome. The core vestibular symptoms include dizziness, unsteadiness, and non-spinning vertigo, which are exacerbated by an upright posture or walking, active or passive motion, and exposure to moving or complex visual stimuli. PPPD is mostly precipitated by acute or episodic vestibular diseases; however, its symptoms cannot be accounted for by its precipitants. PPPD is not a diagnosis of exclusion, but may coexist with other structural diseases. Thus, when diagnosing PPPD, the patient's symptoms must be explained by PPPD alone or by PPPD in combination with a structural illness. PPPD is most frequently observed at approximately 50 years of age, with a female predominance. Conventional vestibular tests do not reveal any specific signs of PPPD. However, the head roll-tilt subjective visual vertical test and gaze stability test after exposure to moving visual stimuli may detect the characteristic features of PPPD, that is, somatosensory- and visually-dependent spatial orientation, respectively. Therefore, these tests could be used as diagnostic tools for PPPD. Regarding the pathophysiology of PPPD, neuroimaging studies suggest shifts in interactions among visuo-vestibular, sensorimotor, and emotional networks, where visual inputs dominate over vestibular inputs. Postural control also shifts, leading to the stiffening of the lower body. To treat PPPD, selective serotonin reuptake inhibitors/serotonin noradrenaline reuptake inhibitors, vestibular rehabilitation, and cognitive behavioral therapy are used alone or in combination.
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Affiliation(s)
- Chihiro Yagi
- Department of Otolaryngology Head and Neck Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata City 951-8510, Japan
| | - Akira Kimura
- Department of Otolaryngology Head and Neck Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata City 951-8510, Japan
| | - Arata Horii
- Department of Otolaryngology Head and Neck Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata City 951-8510, Japan.
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Nomura K, Itakura Y, Minamizono S, Okayama K, Suzuki Y, Takemi Y, Nakanishi A, Eto K, Takahashi H, Kawata Y, Asakura H, Matsuda Y, Kaibara N, Hamanaka S, Kodama H. The Association of Body Image Self-Discrepancy With Female Gender, Calorie-Restricted Diet, and Psychological Symptoms Among Healthy Junior High School Students in Japan. Front Psychol 2021; 12:576089. [PMID: 34675829 PMCID: PMC8523782 DOI: 10.3389/fpsyg.2021.576089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 09/06/2021] [Indexed: 11/29/2022] Open
Abstract
Background: Body image self-discrepancy reflects a preference for weight loss regardless of normal body size and is a distorted cognition that may be a precursor to eating disorders. The aim of this study was to investigate factors associated with body image self-discrepancy among healthy junior high school students in Japan. Method: This cross-sectional study was conducted at one junior high school in Saitama, Japan, in December 2016. After excluding obese participants (defined as 20% above their ideal weight), 304 students (mean age, 13.9years; n=181 girls, 59.5%) who fell into underweight (n=22, 7.2%) and normal weight categories were selected. Body image self-discrepancy was measured using the Contour Drawing Rating Scale which includes eight separate figures representing body sizes. We then calculated the difference by subtracting ideal from current body sizes and defined body image self-discrepancy if the difference >1. Results: Girls constituted 92% (n=49) of the 53 students with body image self-discrepancy. In all students, multivariable stepwise models demonstrated that female gender (OR, 6.92, 95% CI: 2.33–20.51), a calorie-restricted diet (OR, 5.18, 95% CI: 2.22–12.05), and psychological symptoms (OR, 1.47, 95% CI: 1.15–1.87) were significantly associated with an increased risk of body image self-discrepancy. Specifically for girls, an increased risk of body image self-discrepancy was associated with calorie-restricted suppers and psychological symptoms. Conclusion: Body image self-discrepancy among healthy adolescents in Japan was found to be closely linked to being a girl, having a calorie-restricted diet, and having psychological symptoms.
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Affiliation(s)
- Kyoko Nomura
- Department of Environmental Health Science and Public Health, Akita University Graduate School of Medicine, Akita, Japan
| | - Yuki Itakura
- Faculty of Human Development and Culture, Fukushima University, Fukushima, Japan
| | - Sachiko Minamizono
- Department of Environmental Health Science and Public Health, Akita University Graduate School of Medicine, Akita, Japan
| | - Kazuyo Okayama
- Major in Health and Dietetics, School of Health Science, Teikyo Heisei University, Tokyo, Japan
| | - Yumiko Suzuki
- Hiroshima University Graduate School of Humanities and Social Sciences, Hiroshima, Japan
| | - Yukari Takemi
- Department of Nutrition Sciences, Kagawa Nutrition University, Saitama, Japan
| | - Akemi Nakanishi
- Department of Nutrition Sciences, Kagawa Nutrition University, Saitama, Japan
| | - Kumi Eto
- Department of Nutrition Sciences, Kagawa Nutrition University, Saitama, Japan
| | - Hitoshi Takahashi
- Hiroshima University Graduate School of Humanities and Social Sciences, Hiroshima, Japan
| | - Yuki Kawata
- Department of Health and Physical Education, Kokugakuin University, Kanagawa, Japan
| | - Hitomi Asakura
- Department of Nutrition, Teikyo University Hospital, Tokyo, Japan
| | - Yorika Matsuda
- Major in Health and Dietetics, School of Health Science, Teikyo Heisei University, Tokyo, Japan
| | - Naoko Kaibara
- Department of Health and Nutrition University of Human Arts and Sciences, Saitama, Japan
| | - Sakiko Hamanaka
- Major in Health and Dietetics, School of Health Science, Teikyo Heisei University, Tokyo, Japan
| | - Hiroko Kodama
- Major in Health and Dietetics, School of Health Science, Teikyo Heisei University, Tokyo, Japan
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Kim HA, Bisdorff A, Bronstein AM, Lempert T, Rossi-Izquierdo M, Staab JP, Strupp M, Kim JS. Hemodynamic orthostatic dizziness/vertigo: Diagnostic criteria. J Vestib Res 2020; 29:45-56. [PMID: 30883381 PMCID: PMC9249281 DOI: 10.3233/ves-190655] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 02/25/2019] [Indexed: 11/15/2022]
Abstract
This paper presents the diagnostic criteria for hemodynamic orthostatic dizziness/vertigo to be included in the International Classification of Vestibular Disorders (ICVD). The aim of defining diagnostic criteria of hemodynamic orthostatic dizziness/vertigo is to help clinicians to understand the terminology related to orthostatic dizziness/vertigo and to distinguish orthostatic dizziness/vertigo due to global brain hypoperfusion from that caused by other etiologies. Diagnosis of hemodynamic orthostatic dizziness/vertigo requires: A) five or more episodes of dizziness, unsteadiness or vertigo triggered by arising or present during upright position, which subsides by sitting or lying down; B) orthostatic hypotension, postural tachycardia syndrome or syncope documented on standing or during head-up tilt test; and C) not better accounted for by another disease or disorder. Probable hemodynamic orthostatic dizziness/vertigo is defined as follows: A) five or more episodes of dizziness, unsteadiness or vertigo triggered by arising or present during upright position, which subsides by sitting or lying down; B) at least one of the following accompanying symptoms: generalized weakness/tiredness, difficulty in thinking/concentrating, blurred vision, and tachycardia/palpitations; and C) not better accounted for by another disease or disorder. These diagnostic criteria have been derived by expert consensus from an extensive review of 90 years of research on hemodynamic orthostatic dizziness/vertigo, postural hypotension or tachycardia, and autonomic dizziness. Measurements of orthostatic blood pressure and heart rate are important for the screening and documentation of orthostatic hypotension or postural tachycardia syndrome to establish the diagnosis of hemodynamic orthostatic dizziness/vertigo.
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Affiliation(s)
- Hyun Ah Kim
- Department of Neurology, Keimyung University Dongsan Hospital, Daegu, South Korea
| | - Alexandre Bisdorff
- Department of Neurology, Centre Hospitalier Emile Mayrisch, Esch-sur-Alzette, Luxembourg
| | - Adolfo M. Bronstein
- Department of Neuro-otology, Division of Brain Sciences, Imperial College London, Charing Cross Hospital Campus, London, UK
| | - Thomas Lempert
- Department of Neurology, Schlosspark-Klinik, Berlin, Germany
| | | | - Jeffrey P. Staab
- Departments of Psychiatry and Psychology and Otorhinolaryngology – Head and Neck Surgery, Mayo Clinic, Rochester, MN, USA
| | - Michael Strupp
- Department of Neurology and German Center for Vertigo and Balance Disorders, Ludwig Maximilians University, Munich, Germany
| | - Ji-Soo Kim
- Department of Neurology, Seoul National University College of Medicine, Dizziness Center, Seoul National University Bundang Hospital, Seongnam, South Korea
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Bouhaddani SE, van Domburgh L, Schaefer B, Doreleijers TAH, Veling W. Psychotic experiences and trauma predict persistence of psychosocial problems in adolescence. Eur Child Adolesc Psychiatry 2019; 28:1597-1606. [PMID: 30972580 DOI: 10.1007/s00787-019-01321-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 03/20/2019] [Indexed: 10/27/2022]
Abstract
Psychosocial problems during adolescence are heterogenic, rather common, and unstable. At the same time, they are associated with an elevated risk of developing psychiatric disorders later in life. We aimed to describe the trajectories of psychosocial problems during adolescence and examine potential markers of persistence as compared to remission of these problems. At baseline, 1841 adolescents (51.4% female) were included. Of these adolescents, 1512 (mean age = 12.6 [range 11-14 years]; 52.8% female) completed the first and second self-report questionnaires on psychosocial problems (measured with the Strengths and Difficulties Questionnaire), psychotic experiences, trauma, self-esteem and somatic symptoms at two time points over a 1-year period. Regression analyses were used to examine the association between potential predictors and the trajectory of psychosocial problems (remitting versus persistent). Four trajectories were distinguished: 75.6% of the sample showed no problems (the 'none' trajectory), 11.9% were in a 'remitting' trajectory, 9.7% were in an 'incident' trajectory and 2.8% were in the 'persistent' trajectory. Hallucinatory experiences and trauma at baseline were significantly associated with persistence of psychosocial problems compared to those with remitting psychosocial problems. Low rather than high self-esteem was associated with lower risk for persistent problems. Risk of persistence of psychosocial problems increased with accumulation of predictors. Psychotic, especially hallucinatory, experiences and trauma predict persistence of psychosocial problems in adolescents. This underlines the need to assess psychotic experiences and trauma in mental health screening programs.
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Affiliation(s)
| | - Lieke van Domburgh
- Department of Research and Development, Pluryn-Intermetzo, Nijmegen, The Netherlands.,Department of Child and Adolescent Psychiatry, VU Medical Centre, Amsterdam, The Netherlands
| | | | - Theo A H Doreleijers
- Department of Research and Development, Pluryn-Intermetzo, Nijmegen, The Netherlands
| | - Wim Veling
- Department of Psychiatry, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
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Raghuraman P, Balasundaram S, Sarkar S, Subramaniam E. A cross-sectional study of psychiatric morbidity and quality of life among participants utilizing the preventive health-care services of a tertiary hospital. Indian J Psychiatry 2019; 61:192-197. [PMID: 30992615 PMCID: PMC6425810 DOI: 10.4103/psychiatry.indianjpsychiatry_159_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND The burden of mental disorders has been increasingly recognized and 450 million people globally are suffering from mental illness. Mental-physical comorbidity has adverse effects on the overall outcome. Research is scarce with regard to mental health screening in the context of "preventive health care" in India. Thus, the study aimed to identify the prevalence of mental illness and the effect on quality of life (QOL) among participants attending preventive health-care unit (PHCU). SETTINGS AND DESIGN This was a cross-sectional study conducted in PHCU of a tertiary hospital in Puducherry. MATERIALS AND METHODS All consecutive participants (>18 years) attending PHCU were included in the study. The Standard for Clinicians' Interview in Psychiatry (SCIP) screening module, Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) Level 1 Cross-Cutting Symptom Measure, Mini-Cog, and Quality of Life Enjoyment and Satisfaction Questionnaire were administered. Relevant diagnostic modules of SCIP were applied to participants who screened positive on SCIP. Data analysis was performed using SPSS (version 17.0). RESULTS The mean age of participants was 43.38 ± 13.99 years. Of 203 participants enrolled, 28.1% screened positive and 26.1% were confirmed to have psychiatric disorder. About 4% screened positive for cognitive impairment. Most commonly diagnosed disorders were alcohol use disorder and major depressive disorder. The prevalence of depressive disorder was higher in patients with physical disorder. Participants with psychiatric disorder alone or with both psychiatric and physical disorders had significantly poorer QOL (F = 27.13; P < 0.001). CONCLUSION One-fourth of the participants attending preventive health-care services were found to have psychiatric disorders. The presence of psychiatric disorder was associated with significantly poorer QOL. This highlights the importance of routine mental health screening in this setting.
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Affiliation(s)
- Preethy Raghuraman
- Department of Psychiatry, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - Sivaprakash Balasundaram
- Department of Psychiatry, Mahatma Gandhi Medical College and Research Institute, Puducherry, India
| | - Sukanto Sarkar
- Department of Psychiatry, Mahatma Gandhi Medical College and Research Institute, Puducherry, India
| | - Eswaran Subramaniam
- Department of Psychiatry, Mahatma Gandhi Medical College and Research Institute, Puducherry, India
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Hamamura T, Mearns J. Depression and somatic symptoms in Japanese and American college students: Negative mood regulation expectancies as a personality correlate. INTERNATIONAL JOURNAL OF PSYCHOLOGY 2017; 54:351-359. [PMID: 29178129 DOI: 10.1002/ijop.12467] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 10/09/2017] [Indexed: 11/11/2022]
Abstract
This study clarified contradictory findings regarding whether depression and somatic symptoms are associated more strongly with each other in non-Western countries than in Western countries, by examining the relationships of the two variables with negative mood regulation expectancies (NMRE). NMRE are beliefs about one's ability to improve one's negative moods. Participants were 155 Japanese and 176 American undergraduates. They completed self-report measures of NMRE, coping, depression and somatic symptoms. Results showed that depression significantly correlated with somatic symptoms for both men and women in both countries, and there was no cultural difference in the relationship between depression and somatic symptoms. The relationships of depression and somatic symptoms with NMRE did not differ between cultures. NMRE explained variance in depression in both countries but variance in somatic symptoms only for women in both countries. The relationship of NMRE with depression and somatic symptoms paralleled that between depression and somatic symptoms for both cultures. These results were consistent with the previous literature that found no difference between cultures. Results support the cross-cultural validity of measuring NMRE in the context of coping and distress.
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Affiliation(s)
- Toshitaka Hamamura
- Division of Clinical Psychology, Department of Integrated Educational Sciences, University of Tokyo, Tokyo, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | - Jack Mearns
- Department of Psychology, California State University, Fullerton, CA, USA
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Staab JP, Eckhardt-Henn A, Horii A, Jacob R, Strupp M, Brandt T, Bronstein A. Diagnostic criteria for persistent postural-perceptual dizziness (PPPD): Consensus document of the committee for the Classification of Vestibular Disorders of the Bárány Society. J Vestib Res 2017; 27:191-208. [PMID: 29036855 PMCID: PMC9249299 DOI: 10.3233/ves-170622] [Citation(s) in RCA: 334] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 08/21/2017] [Indexed: 12/21/2022]
Abstract
This paper presents diagnostic criteria for persistent postural-perceptual dizziness (PPPD) to be included in the International Classification of Vestibular Disorders (ICVD). The term PPPD is new, but the disorder is not. Its diagnostic criteria were derived by expert consensus from an exhaustive review of 30 years of research on phobic postural vertigo, space-motion discomfort, visual vertigo, and chronic subjective dizziness. PPPD manifests with one or more symptoms of dizziness, unsteadiness, or non-spinning vertigo that are present on most days for three months or more and are exacerbated by upright posture, active or passive movement, and exposure to moving or complex visual stimuli. PPPD may be precipitated by conditions that disrupt balance or cause vertigo, unsteadiness, or dizziness, including peripheral or central vestibular disorders, other medical illnesses, or psychological distress. PPPD may be present alone or co-exist with other conditions. Possible subtypes await future identification and validation. The pathophysiologic processes underlying PPPD are not fully known. Emerging research suggests that it may arise from functional changes in postural control mechanisms, multi-sensory information processing, or cortical integration of spatial orientation and threat assessment. Thus, PPPD is classified as a chronic functional vestibular disorder. It is not a structural or psychiatric condition.
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Affiliation(s)
- Jeffrey P. Staab
- Departments of Psychiatry and Psychology and Otorhinolaryngology – Head and Neck Surgery, Mayo Clinic, Rochester, MN, USA
| | | | - Arata Horii
- Department of Otorhinolaryngology, Niigata University, Niigata, Japan
| | - Rolf Jacob
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Michael Strupp
- Department of Neurology and German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Germany
| | - Thomas Brandt
- Department of Neurology and German Center for Vertigo and Balance Disorders, University Hospital, LMU Munich, Germany
| | - Adolfo Bronstein
- Neuro-Otology Unit, Division of Brain Sciences, Imperial College London, London, UK
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8
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Wong JYH, Tiwari A, Fong DYT, Bullock L. A Cross-Cultural Understanding of Depression Among Abused Women. Violence Against Women 2016; 22:1371-96. [PMID: 26796779 DOI: 10.1177/1077801215624791] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Little research has addressed depression in abused women across cultures. This review examines depression and intimate partner violence (IPV) by comparing and contrasting the IPV definitions, family dynamics, coping, and expressions of depression of women in China, Japan, India, and the United States. Findings reveal that depression is expressed differently across cultures. Somatization is commonly found in Asian countries, but it is not properly assessed by existing Westernized depression assessment tools. In addition, cultural factors were shown to shape abused women's ways of adaptive coping. Cultural awareness and sensitivity are fundamental for successful assessment and intervention for abused women with depression.
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Abstract
Behavioral factors have long been recognized as affecting spatial orientation and balance function. Neuroanatomic and neurophysiologic studies conducted worldwide over the last 30 years have substantially advanced our knowledge about the inherently strong connectivity among threat/anxiety, vestibular, visual, and somatosensory systems in the brain. Clinical investigations have shed greater light on the nature of functional and psychiatric disorders that manifest or magnify vestibular morbidity. Concepts of these syndromes have changed over 150 years. Even their nomenclature has had different meanings in different eras. This chapter will review functional and psychiatric vestibular disorders. Terminology will follow the International Classification of Diseases, 11th edition, beta draft and the International Classification of Vestibular Disorders. Anxiety plays a central role in behavioral vestibular morbidity. Anxiety, traumatic stress, obsessive, and depressive disorders may be primary causes of episodic and chronic vestibular symptoms or secondary complications of other vestibular disorders. These psychiatric illnesses affect 30-50% of patients who consult neurologists or otologists for vestibular symptoms. Coexisting psychiatric disorders adversely affect treatment for patients with structural vestibular diseases, especially when unrecognized. Persistent postural-perceptual dizziness is the leading cause of long-term vestibular disability. Fortunately, pharmacologic, psychotherapeutic, and rehabilitative treatments of these illnesses have improved in recent years.
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Affiliation(s)
- J P Staab
- Department of Psychiatry and Psychology, and Department of Otorhinolaryngology - Head and Neck Surgery, Mayo Clinic, Rochester, MN, USA.
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Nakao M, Takeuchi T. Clinical Characteristics and Referral Patterns of Outpatients Visiting a Japanese Psychosomatic Medicine Clinic. Int J Behav Med 2015; 23:580-8. [DOI: 10.1007/s12529-015-9520-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Associations between psychological distress and the most concerning present personal problems among working-age men in Japan. BMC Public Health 2015; 15:305. [PMID: 25885770 PMCID: PMC4389796 DOI: 10.1186/s12889-015-1676-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 03/23/2015] [Indexed: 11/24/2022] Open
Abstract
Background Personal problems are known to influence mental health among workers. The current study investigated the most concerning present personal problems which have the greatest impact on psychological distress among working-age Japanese men, rather than issues relating to work tasks or duties. Methods We obtained data from the 2010 Comprehensive Survey of Living Conditions conducted by the Ministry of Health, Labour and Welfare. The original survey interviewed 289,363 households in 5,150 randomly selected municipalities of Japan, from which 228,664 households agreed to participate. We analyzed the data pertaining to men who were 20 to 59 years of age and the head of a family. The questionnaire included occupation, employment status, the most concerning present personal problems, and a measure of psychological distress (the Kessler 6 scale). Multiple logistic regression analysis was conducted to delineate the association between present personal problems and psychological distress. Results A total of 76,950 males were included in the analysis, 27.7% of whom reported some type of psychological distress. Statistical analysis revealed that psychological distress was associated with bullying and harassment (Odds Ratio (OR): 2.05, 95% Confidence Interval (95% CI): 1.50-2.56), divorce (OR: 1.90, 95% CI: 1.53-2.26), concerns about one’s purpose in life (OR: 1.73, 95% CI: 1.59-1.88), personal relationships with family members (OR: 1.49, 95% CI: 1.37-1.60), personal relationships with others (OR: 1.38, 95% CI: 1.29-1.48), own diseases (OR: 1.24, 95% CI: 1.15-1.33), and financial difficulties (OR: 1.16, 95% CI: 1.12-1.20); when compared with problems related to work tasks or duties. Conclusions Several personal factors appear to have a greater impact on the mental health of Japanese men of working age, when compared to the influence of work tasks or duties. Asking workers directly about the problems that most concern them in life might help better identify those in need psychological support. Multidisciplinary interventions to address their life concerns will likely be necessary for solving these problems and reducing psychological distress.
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Wu RH, Feng C, Xu Y, Hua T, Liu XY, Fang M. Late-onset depression in the absence of stroke: associated with silent brain infarctions, microbleeds and lesion locations. Int J Med Sci 2014; 11:587-92. [PMID: 24782647 PMCID: PMC4003543 DOI: 10.7150/ijms.8025] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 03/25/2014] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Late-onset depression (LOD) is a frequent mood disorder among elderly. Previous studies have proved that LOD is associated with cerebral silent lesions especially white matter lesions (WML) and yielded the "vascular depression" hypothesis to explain the pathogenesis of LOD. However, there were relatively few studies about the association between silent brain infarctions (SBIs), microbleeds (MBs) and the prevalence of LOD. In this study we sought to evaluate the presence, accumulation and locations of SBIs and MBs, and explore the possible association between them and LOD. METHODS 65 patients of LOD diagnosed according to DSM-IV and 270 subjects of control group were enrolled and scanned by MRI to analyze the presence, numbers and locations of SBIs and MBs. Clinical and radiological characteristics were compared between LOD patients and control group. Logistic regression models were constructed to identify the independent risk factors for LOD. RESULTS LOD patients had higher prevalence and numbers of both SBIs and MBs. SBIs and MBs in the left hemisphere, SBIs in basal ganglia and lobar MBs were all independent risk factors for LOD. CONCLUSION The presence of both SBIs and MBs were associated with a higher rate LOD. Lesions in some specific locations might be critical for the presence of LOD.
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Affiliation(s)
- Ri-Han Wu
- 1. Department of Neurology, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Shanghai, China
| | - Chao Feng
- 1. Department of Neurology, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Shanghai, China
- 2. Yiwu Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, China
| | - Yu Xu
- 3. Department of Radiology, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Shanghai, China
| | - Ting Hua
- 3. Department of Radiology, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Shanghai, China
| | - Xue-Yuan Liu
- 1. Department of Neurology, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Shanghai, China
| | - Min Fang
- 1. Department of Neurology, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Shanghai, China
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13
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Nakao M, Ohara C. The perspective of psychosomatic medicine on the effect of religion on the mind-body relationship in Japan. JOURNAL OF RELIGION AND HEALTH 2014; 53:46-55. [PMID: 22434576 PMCID: PMC3929030 DOI: 10.1007/s10943-012-9586-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Shintoism, Buddhism, and Qi, which advocate the unity of mind and body, have contributed to the Japanese philosophy of life. The practice of psychosomatic medicine emphasizes the connection between mind and body and combines the psychotherapies (directed at the mind) and relaxation techniques (directed at the body), to achieve stress management. Participation in religious activities such as preaching, praying, meditating, and practicing Zen can also elicit relaxation responses. Thus, it is time for traditional religions to play an active role in helping those seeking psychological stability after the Great East Japan Earthquake and the ongoing crisis related to the nuclear accident in Fukushima, Japan, to maintain a healthy mind-body relationship.
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Affiliation(s)
- Mutsuhiro Nakao
- Division of Psychosomatic Medicine, Teikyo University Hospital, Teikyo University School of Medicine, 2-11-1, Kaga, Itabashi, Tokyo, 173-8605, Japan,
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14
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Bai YM, Chiou WF, Su TP, Li CT, Chen MH. Pro-inflammatory cytokine associated with somatic and pain symptoms in depression. J Affect Disord 2014; 155:28-34. [PMID: 24176538 DOI: 10.1016/j.jad.2013.10.019] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 09/23/2013] [Accepted: 10/10/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND More than two-thirds of depressed patients complain of somatic and pain symptoms, which are frequently regarded as a psychological reaction. Although there is a growing body of evidence showing that depression is related to immune abnormalities, few studies have investigated the association between inflammatory cytokines and somatic/pain symptoms. METHOD Patients with depressive disorder but without any medical disorders, and age/gender/body mass index (BMI)-matched healthy subjects were enrolled. All the subjects completed the self-rating scales of the Beck Depression Inventory-II and the Depression and Somatic Symptoms Scale, which was comprised of depressive, somatic, and pain subscales. Pro-inflammatory cytokines, including C-reactive protein (CRP), interleukin-2 receptor (sIL-2R), soluble interleukin 6 receptor (sIL-6R), soluble TNF-receptors (sTNF-R), soluble P-selectin (sP-selectin), monocyte chemotactic protein-1 (MCP-1), and adiponectin, were assessed by enzyme-linked immunosorbent assays. RESULTS In all, 109 patients with depressive disorder and 126 normal controls were enrolled. The patients with depressive disorder had significantly more severe depression, somatic and pain symptoms (all p<0.001), and higher levels of sIL-2R (p<0.0001), sTNF-R (p<0.001), and sP-selectin (p=0.005) than the normal control group. Using multivariate regression analysis with controlling of age, gender, BMI, and other pro-inflammatory cytokines, sIL-2R was the most significant predictor for depressive symptoms (p<0.0001); with further controlling of severity of depressive symptom, sP-selectin was the only predictor for somatic (p=0.002) and pain (p=0.059) symptoms. CONCLUSION The elevated sP-selectin associated with somatic symptoms in depression, may indicate early micro-vascular changes occur subtly, and provide neurobiological evidence for somatic and pain symptom in depression.
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Affiliation(s)
- Ya-Mei Bai
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Psychiatry, College of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Wen-Fei Chiou
- National Research Institute of Chinese Medicine, Taipei, Taiwan; Institute of Life Science, National Taitung University, Taitung, Taiwan; Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Tung-Ping Su
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Psychiatry, College of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Cheng-Ta Li
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Psychiatry, College of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Mu-Hong Chen
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan
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15
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Takeuchi T, Nakao M. The relationship between suicidal ideation and symptoms of depression in Japanese workers: a cross-sectional study. BMJ Open 2013; 3:e003643. [PMID: 24293204 PMCID: PMC3845061 DOI: 10.1136/bmjopen-2013-003643] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVES The prevalence of suicidal ideation and predictors for suicidal ideation among Japanese workers is unknown, although a previous study reported a 30% prevalence rate of suicidal ideation in a psychosomatic clinical setting. Hence, we evaluated the prevalence of suicidal ideation and its relationship with depressive symptoms among Japanese workers. METHODS For this purpose, a cross-sectional design was used. Major depressive disorder (MDD) and suicidal ideation in 1266 workers (1100 men and 166 women, aged 20-69 years) were assessed through clinical interviews conducted in accordance with the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders. RESULTS A total of 34 and 70 participants were diagnosed with suicidal ideation and MDD, respectively. Suicidal ideation was especially prevalent in 40-year-olds to 49-year-olds. Six of the eight symptoms of MDD (depressive mood, loss of interest, weight loss, psychomotor agitation, worthlessness and concentration loss) were related to suicidal ideation. Depressive mood had the strongest relationship with suicidal ideation, followed by worthlessness and concentration loss. Worthlessness had the highest area under the curve in predicting suicidal ideation, followed by concentration loss and depressive mood. CONCLUSIONS We conclude that MDD symptoms-particularly depressive mood, worthlessness and concentration loss-are potential predictors of suicidal ideation in Japanese workers.
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Affiliation(s)
- Takeaki Takeuchi
- Department of Hygiene and Public Health and Division of Psychosomatic Medicine, Teikyo University School of Medicine, Tokyo, Japan
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16
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Relationship between the onset of depression and stress response measured by the Brief Job Stress Questionnaire among Japanese employees: a cohort study. PLoS One 2013; 8:e56319. [PMID: 23424656 PMCID: PMC3570457 DOI: 10.1371/journal.pone.0056319] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 01/08/2013] [Indexed: 11/19/2022] Open
Abstract
Background The proportion of Japanese workers experiencing intense worry or stress during working life is in excess of 60%, and the incidence of psychiatric disorders and suicide due to psychological burden from work duties is increasing. To confirm whether the stress response measured by the Brief Job Stress Questionnaire (BJSQ) can identify risk for depression, a cohort study was conducted to evaluate whether the stress response measured by BJSQ was associated with the onset of depression. Methods A total of 1,810 participants aged 20–70 years in 2005 completed the stress response of the BJSQ and were followed-up until August, 2007 by examining sick pay records. Depression was defined by a description in sick pay records that included “depression” or “depressive symptoms” as a reason for sick leave according to a physician's medical certificate. The participants were divided into quartiles (Ql, Q2, Q3, and Q4) according to the total stress response score of BJSQ at baseline. Furthermore, the participants were divided into a higher score category (Q4) and a lower score category (Q1–Q3). Risk ratios of the stress response of the BJSQ for onset of depression were calculated using a multivariable Cox proportional hazard model. Results Among 1,810 participants, 14 developed depression during a mean of 1.8 years of follow-up. The risk ratio was 2.96 (95% confidence interval [CI], 1.04–8.42, p for trend = 0.002) when the higher stress response score category of BJSQ was compared with the low stress response score category for sick leave due to depression. After adjusting for gender, age, marital status, and having children, the risk ratios were similar to no adjustment. Conclusions These findings suggest that the stress response measured by the BJSQ can demonstrate risk for the onset of depression.
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17
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Nakao M, Shinozaki Y, Nolido N, Ahern DK, Barsky AJ. Responsiveness of hypochondriacal patients with chronic low-back pain to cognitive-behavioral therapy. PSYCHOSOMATICS 2012; 53:139-47. [PMID: 22424162 DOI: 10.1016/j.psym.2011.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 09/15/2011] [Accepted: 09/15/2011] [Indexed: 11/16/2022]
Abstract
BACKGROUND Evidence has suggested that cognitive-behavioral therapy (CBT) is effective in reducing hypochondriacal symptoms, and another line of evidence has suggested that CBT is also effective in reducing pain and the psychological conditions associated with chronic low-back pain (CLBP). The purpose of this study was to examine the effectiveness of CBT among hypochondriacal patients with and without CLBP. METHODS A total of 182 hypochondriacal patients were randomly assigned to a CBT or control group. The Somatic Symptom Inventory was used to define CLBP, and the Symptom Checklist 90R (SCL90R) was used to assess psychological symptoms. The outcome measures for hypochondriasis, the Whiteley Index (WI) and the Health Anxiety Inventory (HAI) were administered before the intervention and at 6 and 12 months after completion of the intervention. RESULTS In the total sample, both WI and HAI scores were significantly decreased after treatment in the CBT group compared with the control group. Ninety-three (51%) patients had CLBP; the SCL90R scores for somatization, depression, phobic anxiety, paranoid ideation, and general severity were significantly higher in CLBP(+) group than in the CLBP(-) group at baseline. Although the WI and HAI scores were significantly decreased after treatment in the CLBP(-) group, such significant pre- to post-changes were not found in the CLBP(+) group. CONCLUSIONS CBT was certainly effective among hypochondriacal patients without CLBP, but it appeared to be insufficient for hypochondriacal patients with CLBP. The core psychopathology of hypochondriacal CLBP should be clarified to contribute to the adequate management of hypochondriacal symptoms in CLBP patients.
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Affiliation(s)
- Mutsuhiro Nakao
- Division of Psychosomatic Medicine, Teikyo University Hospital, Tokyo, Japan.
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18
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Jardri R, Maron M, Delion P, Thomas P. Pain as a confounding factor in postnatal depression screening. J Psychosom Obstet Gynaecol 2010; 31:252-5. [PMID: 20937012 DOI: 10.3109/0167482x.2010.521271] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Postnatal depression (PND) is one of the most serious complications following delivery in developed countries today. Thus, early screening strategies by first-line healthcare workers are of primary importance. Pain following childbirth has been proposed as a possible risk-marker for later depressive disorder. We tested this assumption and explored the possible link between pain and overestimation of PND risk in routine clinical screenings. METHODS We assessed 320 women between the third and fifth day after delivery as well as at 8 weeks post-partum (PP). Midwives were asked to evaluate the risk of later PND upon discharge from the maternity unit; additionally, pain measurements were obtained using the Visual Analogic Scale (VAS) over the same time period. A stepwise logistic regression analysis was performed to identify the risk markers linked to a positive depressive disorder diagnosis (according to the MINI-DSM-IV) at 8 weeks PP. RESULTS AND DISCUSSION Multivariate risk analysis showed no statistical link between physical pain shortly after childbirth and subsequent PND diagnosis at 8 weeks PP. However, VAS measurements for pain were significantly higher for women that the midwives estimated to be at risk for PND (|Z| = 2.78, p = 0.005), suggesting the routine clinical screening for PND is susceptible for false-positives. Psychiatrists should encourage midwives to have an empathetic approach, to increase the detection as well as treatment of mental and physical suffering in early postpartum. At the same time, adequate education programmes for early PND screening should be proposed to non-psychiatric staffs to demonstrate that women at risk of PND often show minimal physical symptoms.
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Affiliation(s)
- Renaud Jardri
- Perinatal Psychiatry Unit, Department of Adult Psychiatry, Lille University Medical Centre, Fontan Hospital, Lille F-59037, France.
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Hung CI, Liu CY, Wang SJ, Juang YY, Yang CH. Somatic symptoms: an important index in predicting the outcome of depression at six-month and two-year follow-up points among outpatients with major depressive disorder. J Affect Disord 2010; 125:134-40. [PMID: 20064663 DOI: 10.1016/j.jad.2009.12.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2009] [Revised: 12/14/2009] [Accepted: 12/14/2009] [Indexed: 11/27/2022]
Abstract
BACKGROUND Few studies have simultaneously compared the ability of depression, anxiety, and somatic symptoms to predict the outcome of major depressive disorder (MDD). This study aimed to compare the MDD outcome predictive ability of depression, anxiety, and somatic severity at 6-month and 2-year follow-ups. METHODS One-hundred and thirty-five outpatients (men/women=34/101) with MDD were enrolled. Depression and anxiety were evaluated by the Hamilton Depression Rating Scale, Hospital Anxiety and Depression Scale, and depression subscale of the Depression and Somatic Symptoms Scale (DSSS). Somatic severity was evaluated by the somatic subscale of the DSSS. Subjects undergoing pharmacotherapy in the follow-up month were categorized into the treatment group; the others were categorized into the no-treatment group. Multiple linear regressions were used to identify the scales most powerful in predicting MDD outcome. RESULTS Among the 135 subjects, 119 and 106 completed the 6-month and 2-year follow-ups, respectively. Somatic severity at baseline was correlated with the outcomes of the three scales at the two follow-ups. After controlling for demographic variables, somatic severity independently predicted most outcomes of the three scales at the two follow-ups in the no-treatment group and the cost of pharmacotherapy and DSSS score at the 6-month follow-up in the treatment group. LIMITATIONS Division of the subjects into treatment and no-treatment groups was not based on randomization and bias might have been introduced. CONCLUSIONS Somatic severity was the most powerful index in predicting MDD outcome. Psychometric scales with appropriate somatic symptom items may be more accurate in predicting MDD outcome.
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Affiliation(s)
- Ching-I Hung
- Department of Psychiatry, Chang-Gung Memorial Hospital at Linkou and Chang-Gung University School of Medicine, Taiwan.
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20
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Nakao M, Sato M, Nomura K, Yano E. Benzodiazepine prescription and length of hospital stay at a Japanese university hospital. Biopsychosoc Med 2009; 3:10. [PMID: 19818119 PMCID: PMC2765986 DOI: 10.1186/1751-0759-3-10] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Accepted: 10/09/2009] [Indexed: 12/04/2022] Open
Abstract
Background The relationship between bed days and benzodiazepine prescription (BDZ) in Western countries is inconclusive, and no hospital-based report has documented this phenomenon in Japan. This study was done to assess the association between bed days and BDZ in a Japanese hospital. Methods 21,489 adult patients (55.1% men, mean age 59.9 years old) hospitalized between April, 2005 and December, 2006 were enrolled in the study. Patient age, sex, ICD-10 diagnosis, prescription profile, and days of hospital stay were assessed in 13 non-psychiatric departments using a computer ordering system. Patients prescribed a benzodiazepine during hospitalization were defined as positive. Results Of the total sample, 19.9% were allocated to the benzodiazepine (+) group. Female sex and older age were significant factors associated with benzodiazepine prescription. The median number of bed days was 13, and the likelihood of BDZ significantly increased with the number of bed days, even after controlling for the effects of age, gender, and ICD-10 diagnosis. For example, when the analysis was limited to patients with 50 bed days or longer, the percentage of BDZ (32.7%) was equivalent to that of a report from France. Conclusion Irrespective of department or disease, patients prescribed benzodiazepine during their hospital stay tended to have a higher number of bed days in the hospital. The difference in the prevalence of BDZ between this study and previous Western studies might be attributed to the relatively short length of hospital stay in this study. Because BDZs are often reported to be prescribed to hospitalized patients without appropriate documentation for the indications for use, it is important to monitor the rational for prescriptions of benzodiazepine carefully, for both clinical and economical reasons.
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Affiliation(s)
- Mutsuhiro Nakao
- Department of Hygiene and Public Health, Teikyo University School of Medicine, Tokyo, Japan.
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Nakao M, Takeuchi T, Yoshimasu K. A proposed approach to suicide prevention in Japan: the use of self-perceived symptoms as indicators of depression and suicidal ideation. Environ Health Prev Med 2008; 13:313-21. [PMID: 19568891 PMCID: PMC2698228 DOI: 10.1007/s12199-008-0048-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2008] [Accepted: 08/14/2008] [Indexed: 11/24/2022] Open
Abstract
The incidence of suicide in Japan has increased markedly in recent years, making suicide a major social problem. Between 1997 and 2006, the annual number of suicides increased from 24,000 to 32,000; the most dramatic increase occurred in middle-aged men, the group showing the greatest increase in depression. Recent studies have shown that prevention campaigns are effective in reducing the total number of suicides in various areas of Japan, such as Akita Prefecture. Such interventions have been targeted at relatively urban populations, and national data from public health and clinical studies are still needed. The Japanese government has established the goal of reducing the annual number of suicides to 22,000 by 2010; toward this end, several programs have been proposed, including the Mental Barrier-Free Declaration, and the Guidelines for the Management of Depression by Health Care Professionals and Public Servants. However, the number of suicides has not declined over the past 10 years. Achieving the national goal during the remaining years will require extensive and consistent campaigns dealing with the issues and problems underlying suicide, as well as simple screening methods for detecting depression. These campaigns must reach those individuals whose high-risk status goes unrecognized. In this review paper, we propose a strategy for the early detection of suicide risk by screening for depression according to self-perceived symptoms. This approach was based on the symposium Approach to the Prevention of Suicide in Clinical and Occupational Medicine held at the 78th Conference of the Japanese Society of Hygiene, 2008.
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Affiliation(s)
- Mutsuhiro Nakao
- Department of Hygiene and Public Health, Teikyo University School of Medicine, 2-11-1, Itabashi, Tokyo, 173-8605, Japan,
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Symptomatology of depressive state in the workplace. A 20-year cohort study. Soc Psychiatry Psychiatr Epidemiol 2008; 43:343-8. [PMID: 18224266 DOI: 10.1007/s00127-008-0306-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Accepted: 12/23/2007] [Indexed: 10/22/2022]
Abstract
Authors investigated symptomatology of depressive state among workers in a 20-year study. A cohort of 167 men of a company in Japan, aged 18-40 years old at baseline in 1985 was researched as a study sample. Depressive symptoms were assessed by the Zung's self-rating depression scale (SDS) consisting of 6 somatic- and 14 psychological-symptom items. In a logistic regression analysis, sleep disturbance and fatigue, and total somatic-symptom scores were related to both future and long-term depressive state (all P < 0.05), after adjusting age and other variables. Although many unrecognized cases of depression exist, they may report somatic symptoms as potential depressive state.
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Nomura K, Nakao M, Sato M, Ishikawa H, Yano E. The Association of the Reporting of Somatic Symptoms with Job Stress and Active Coping among Japanese White‐collar Workers. J Occup Health 2007; 49:370-5. [DOI: 10.1539/joh.49.370] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Kyoko Nomura
- Department of Hygiene and Public HealthTeikyo University School of MedicineJapan
| | - Mutsuhiro Nakao
- Department of Hygiene and Public HealthTeikyo University School of MedicineJapan
| | - Mikiya Sato
- Department of Hygiene and Public HealthTeikyo University School of MedicineJapan
| | - Hirono Ishikawa
- Department of Hygiene and Public HealthTeikyo University School of MedicineJapan
| | - Eiji Yano
- Department of Hygiene and Public HealthTeikyo University School of MedicineJapan
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