Chronobiological study about the effect of mobile phone dependence on sleep rhythm and depression among university students

• Project/Area Number: 15K01682
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied health science
• Research Institution: Shimane University
• Principal Investigator: EZOE Satoko 島根大学, 学術研究院教育研究推進学系, 教授 (40232954)
• Co-Investigator(Kenkyū-buntansha): 井上 顕 高知大学, 教育研究部医療学系臨床医学部門, 教授 (40469036) ; 飯田 忠行 県立広島大学, 保健福祉学部(三原キャンパス), 教授 (50290549)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: スマートフォン依存 / 睡眠 / 抑うつ / 大学生 / クロノタイプ / 質問紙調査 / Actiwatch / 信頼性 / 妥当性 / うつ / 因子分析

Outline of Final Research Achievements

We administered a self-report questionnaire to 149 university students and developed Japanese version of Smartphone Dependence Scale (J-SDS). According to exploratory factor analysis, the final scale consisted of 5 factors:1) craving and withdrawal, 2)overuse and tolerance, 3)virtual life orientation, 4)disturbance of concentration in classs, and 5)physical symptoms. Cronbach's alpha value for the J-SDS was 0.92. The J-SDS score became significantly higher with longer hours of smartphone use. Our results suggest that the J-SDS is a reliable and valid scale for screening university students who may be at risk of developing smartphone dependence. Furthermore, results of multivariate logistic regression analysis indicated that scores for the J-SDS and the Pittsburgh Sleep Quality Index (PSQI) were significantly related to Beck Depression Inventory (BDI) score. Our results suggest that smartphone dependence and poor sleep quality are associated with depressive state in students in Japan.

Academic Significance and Societal Importance of the Research Achievements

青少年におけるスマートフォン（以下スマホ）依存は、わが国において非常に重要な問題になっているが、それを評価する信頼性及び妥当性のある尺度はほとんど開発されていない。そこで、今回信頼性及び妥当性のあるスマホ依存スケールを開発したことは、今後のスマホ依存研究にとって有意義なことだと考えられる。また、スマホ依存は睡眠と抑うつに関連している可能性があり、大学生を対象にして、他の要因の影響をコントロールした上で、スマホ依存と睡眠の質が抑うつと有意に関連していることを示すことができたことは、大学生のメンタルヘルス向上のための施策を立てる上で意義があると思われる。

Research Products

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• [Journal Article] Important measures for dealing with future urban earthquakes in Japan: Lessons from the 2018 northern Osaka Prefecture Earthquake. (2019)
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• [Journal Article] Ongoing efforts coordinated by personnel in numerous areas and disciplines to encourages local children to lead healthy lifestyles during early childhood, later childhood, and early adolescence. (2019)
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• [Journal Article] Discussion of several aspects of panic disorder and further research of that disorder in the future. (2019)
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• [Journal Article] A systematic summary of "social anxiety disorder" and the need for detailed examination of approaches in the future. (2019)
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  • Journal Title: J St Mar Med Ins Volume: 19 Pages: 32-35
  • NAID: 40021879407
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• [Journal Article] A discussion of approaches to dealing with neurodevelopmental disorders with a focus on autism spectrum disorder and attention-deficit/hyperactivity disorder. (2019)
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  • Journal Title: J St Mar Med Ins Volume: 19 Pages: 36-39
  • NAID: 40021879447
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• [Journal Article] The need to develop a strategy with an evidence-based guideline for the prevention of gambling disorder. (2019)
  • Author(s): Hashioka, S, Inoue, K, Takeshita H, Kamura, M, Fujita, Y
  • Journal Title: Asia pac J Public Health Volume: 印刷中
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• [Journal Article] Influence of a program combining amusement and exercise on subjective well-being: Six-month intervention study with a complex-type program for community-dwelling elderly subjects. (2018)
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  • Journal Title: Open J Prev Med Volume: 8 Pages: 266-281
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• [Journal Article] Effects of lemon beverages on bone metabolism and bone mineral density in postmenopausal women: A double-blind, controlled intervention study with Ca-supplemented and unsupplemented lemon beverages (2018)
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  • Journal Title: Open J Prev Med Volume: 8 Pages: 301-314
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• [Journal Article] 地域在住高齢者を対象としたアミューズメントと有酸素運動を併用した認知症予防プログラムの効果～12ヶ月間の介入による検討～ (2018)
  • Author(s): 國重雅史、石附智奈美、飯田忠行、川畑なみ、福田浩士、橋本弘子、原田俊英、宮口英樹
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• [Journal Article] Implications of Systemic Inflammation and Periodontitis for Major Depression. (2018)
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• [Journal Article] The mutual development of universities and areas in Semey and three prefectures in Japan: Continuing educational and research activities, clinical practice, and cooperation and new proposals based on our history with international exchanges. (2018)
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• [Journal Article] Effects of Psychological Stress from a National License Examination on the Urine 8-Hydroxy-Deoxyguanosine Levels in Young Female Students, Taking into Account the Menstrual Cycle (2018)
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  • DOI: 10.4236/ojpm.2018.82003
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• [Journal Article] Association between the Profile of Mood States and autonomic nervous system activity during sleep in female students (2018)
  • Author(s): Iida T, Kunishige M, Ito Y, Tatsumi A, Nagaoka K, Ezoe S, Harada T
  • Journal Title: International Medical Journal Volume: 25 Pages: 66-66
  • Peer Reviewed
• [Journal Article] A discussion of current circumstances that need to be studied based on suicide trends in Japan and Ukraine (2018)
  • Author(s): Inoue K, Parnysta O, Noso Y, Takeichi N, Hoshi M, Moriwaki S, Tamara Z
  • Journal Title: J St Mar Med Ins Volume: 18 Pages: 50-52
  • NAID: 40021519073
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• [Journal Article] Systematic report on panic disorder from various perspectives (2018)
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  • NAID: 40021519035
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• [Journal Article] Suggesting new outlooks with the potential to facilitate futute studies of suicide in Japan (2018)
  • Author(s): Inoue K, Tabuchi, Matsui R, Moriwaki S, Fukunaga T
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• [Journal Article] The importance of ascertaining what suicide prevention campaignes have been conducted at the national and local level and understanding, based on those campaignes, approaches that are needed to devise future preventive measures at the municipal level (2018)
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• [Journal Article] Urgent need for more effective measures to prevent drug abuse by regular stimulant users in Japan: The need for coordinated efforts to prevent drug abuse (2018)
  • Author(s): Inoue K, Fukunaga T, Fujita Y, Takashita H, Takinami Y, Okazaki Y
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  • NAID: 40021519094
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• [Journal Article] Endothelial dysfunction in rectal cancer patients chronically exposed to ionizing radiation (2017)
  • Author(s): Rakhypbekov Tolebay、Inoue Ken、Pak Laura、Kawano Noriyuki、Takeichi Nobuo、Hoshi Masaharu、Noso Yoshihiro、Chaizhunusova Nailya、Manambayeva Zukhra、Khozhayev Arman、Molgazhdarov Maulen、Olzhaev Sayakhat、Tokanova Sholpan、Madiyeva Madina
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  • DOI: 10.1007/s00411-017-0695-4
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• [Journal Article] Cytogenetic abnormalities of the descendants of permanent residents of heavily contaminated East Kazakhstan (2017)
  • Author(s): Chaizhunusova Nailya、Madiyeva Madina、Tanaka Kimio、Hoshi Masaharu、Kawano Noriyuki、Noso Yoshihiro、Takeichi Nobuo、Rakhypbekov Tolebay、Urazalina Nailya、Dovgal Galina、Rymbaeva Tamara、Tokanova Sholpan、Beisengazina Meruert、Kembayeva Kulypash、Inoue Ken
  • Journal Title: Radiat Environ Biophys. Volume: 56 Issue: 4 Pages: 337-343
  • DOI: 10.1007/s00411-017-0717-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Comparison of clinical features of panic disorder patients with and without family history of psychiatric disorders (2017)
  • Author(s): Inoue K, Kaiya H, Hara N, Okazaki Y
  • Journal Title: Sci Healthcare Volume: 5 Pages: 67-75
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• [Journal Article] Age-dependent contributions of neck circumstance to indices of obesity among female college students aged 18 to 20 years (2017)
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  • Peer Reviewed
• [Journal Article] Influence of interaction among elderly through amusement on their physiological function: One-month introduction at a day care service center for the elderly (2017)
  • Author(s): Kawabata N, Miyaguchi H, Kunishige M, Ishizuki C, Ito Y, Harada T, Iida T
  • Journal Title: Asian J Occup Ther Volume: 13 Pages: 23-30
  • NAID: 130006887038
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• [Journal Article] Changes in biomarkers of psychological stress and bone resorption markers in young females with and without depressive symptoms during different menstrual phases (2017)
  • Author(s): Iida, T, Inoue, K, Ito, Y, Ishikawa, H, Kagiono, M, Chikamura, C, Nagaoka, K, Harada, T, Teradaira, R
  • Journal Title: International Medical Journal Volume: 24 Pages: 34-38
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Focus on oxidative stress markers as an index of mental health (2017)
  • Author(s): Iida, T, Inoue, K, Kawabata, N, Yamamura, Y, Sato, T, Miyagi, A, Ito, Y, Ishikawa, H, Nagaoka, K, Harada, T, Ezoe, S
  • Journal Title: Journal of St Marianna Medical Institute Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Development of Japanese version of Smartphone Dependence Scale (2016)
  • Author(s): Ezoe, S, Iida, T, Inoue, K, Toda, M
  • Journal Title: Open Journal of Preventive Medicine Volume: 6 Issue: 07 Pages: 179-185
  • DOI: 10.4236/ojpm.2016.67017
  • NAID: 120006841817
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Guidelines on suicide prevention measures for South Korea and Japan based on recent suicide trends: The need to utilize this approach to devise future suicide prevention measures for the rest of Asia and the rest of the world (2016)
  • Author(s): Inoue, K, Chayzhunusova, N, Hoshi, M, Noso, Y, Takeichi, N, Nargul, O, Timur, M, Zhanat, S, Akerke, K, Ulzhan, J, Sholpan, C, Alua, S, Dina, B, Rakhypbekov, TK
  • Journal Title: Science & Healthcare Volume: 2 Pages: 47-55
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A discussion of various aspects of panic disorder depending on presence or absence of agoraphobia (2016)
  • Author(s): Inoue, K, Kaiya, H, Hara, N, Okazaki, Y
  • Journal Title: Comprehensive Psychiatry Volume: 69 Pages: 132-135
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] The need for prompt measures to prevent people age 70 or over and juveniles and adolescents from going missing: The importance of devising specific measures to deal with behavior caused by dementia, other illness, of family problems (2016)
  • Author(s): Inoue, K, Fujita, Y, Takeshita, H, Yamamura, Y, Fujita, Y, Moriwaki, S, Iida, T, Sampei, M, Ezoe, S, Miyaoka, T, Horiguchi, J, Okazaki, Y, Fukunaga, T, Takeichi, N, Hoshi, M, Noso, Y
  • Journal Title: International Medical Journal Volume: 23 Pages: 641-643
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 社会医学・臨床医学の両側面からの研究を目指して (2016)
  • Author(s): 井上顕
  • Journal Title: The Kitakanto Medical Journal Volume: 66 Pages: 223-234
  • NAID: 130005249035
  • Open Access
• [Journal Article] 若年者における睡眠と気分との関連ー抑うつ、不安、気分プロフィールを用いて (2016)
  • Author(s): 飯田忠行、國重雅史、横川奈央、伊藤康宏、長岡芳、原田俊英
  • Journal Title: Bio Clinica Volume: 31 Pages: 62-65
• [Journal Article] A long-term study of the association between the relative poverty rate and suicide rate in Japan. (2016)
  • Author(s): Inoue, K, Fujita, Y, Takeshita, H, Abe, S, Fujihara, J, Ezoe, S, Sampei, M, Miyaoka, T, Horiguchi, J, Okazaki, Y, Fukunaga, T
  • Journal Title: J Forensic Sci Volume: 61 Issue: S1 Pages: 268-281
  • DOI: 10.1111/1556-4029.12998
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• [Journal Article] Pilot study of autonomic nervous system activity during sleep and after arousal in different mood states. (2016)
  • Author(s): Iida, T, Inoue, K, Kunishige, M, Kanazashi, M, Yamamura, Y, Kanaya, S, Shimizu, M, Ito, Y, Nagaoka, K, Harada, T, Ezoe, S
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• [Journal Article] 退院準備度評価尺度 (2016)
  • Author(s): 井上顕、西田淳志、西村幸香、原直美、岡崎祐士
  • Journal Title: 臨床精神医学 Volume: 44増刊 Pages: 597-608
• [Journal Article] 酸化ストレスマーカーと心理的ストレスの関連 (2015)
  • Author(s): 飯田忠行、伊藤康宏、原田俊英
  • Journal Title: 臨床化学 Volume: 44 Pages: 207-213
• [Presentation] 大学生のスマートフォン中毒及び睡眠の質と抑うつ状態との関係 (2019)
  • Author(s): 江副智子、飯田忠行、井上顕、戸田雅裕
  • Organizer: 第89回日本衛生学会学術総会
• [Presentation] Important viewpoints of suicide prevention: A Tokyo-based investigation of causative factors. (2018)
  • Author(s): Inoue, K, Moriwaki, S, Fujita, Y, Okazaki, Y, Fukunaga, T
  • Organizer: The 24th Congress of the International Academy of Legal Medicine
  • Int'l Joint Research
• [Presentation] 経済的事項と自殺との関連についての検討ー春季賃上げ率の動向が自殺推移の指標となる可能性があるのか (2018)
  • Author(s): 井上顕、藤田委由、竹下治男、橋岡禎征、和氣玲、宮岡剛、岡崎祐士、堀口淳
  • Organizer: 第114回日本精神神経学会学術総会
• [Presentation] A basic study on specific measures to prompte healthy lifestyles and mental and physical health among elementary and middle school students in a region of Shimane Prefecture: efforts involving school-related personnel and university personnnel ～ collaborative action from several fields to be conducted in Kazakhstan～. (2018)
  • Author(s): Inoue, K, Fujita, Y, Takeshita, H et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Further improving medicine in kazakhstan and Japan through an agreement on bilateral exchanges: fostering further collaboration among Semey, Kochi, Shimane, and Hiroshima. (2018)
  • Author(s): Inoue, K, ChayzhunuInternational Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical Universitysova, N, Noso, Y et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Study for measures against refuse to atttend school in Japanese students: important this research in Kazakhstan in the future. (2018)
  • Author(s): Inoue, K, Hashioka, S, Fujita, Y et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Was there the change of suicide methods in several periods? ～the nenecessity of such investigation and comparison in the world～. (2018)
  • Author(s): Inoue, K, Chayzhunusova, N, Miyaoka, T et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Implementation of concrete suicide prevention measures and activities at the national and regional level in Japan ～ in order to study of this viewpoint in Semey ～. (2018)
  • Author(s): Inoue, K, Chayzhunusova, N, Nishimura, M et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Some problems in urban earthquakes that became prominent in the earthquake of Northern Osaka Prefecture in Japan: things to consider in earthquakes in the world. (2018)
  • Author(s): Inoue, K, Hashioka, S, Fujita, Y et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Agreements on international exchanges between universities and facilitating exchanges with the prefectures and municipalities where they are located: In light of a short systematic review. (2018)
  • Author(s): Inoue, K, Chayzhunusova N, Hoshi, M et al.
  • Organizer: International Scientific and Practical Conference "Modern Innovative Methods in Modernization of Medical Education, Science and Practice" dedicated the the 65th Anniversary of Semey Medical University
  • Int'l Joint Research
• [Presentation] Psychiatric topic contents of Semipalantinsk Study in future based on the viewpoints in the present time (2018)
  • Author(s): Inoue K, Noso Y, Takeichi N, Wada Y, Moriwaki S, Seksenbaev N, Zhanat S, Timur M, Nurgul O, Bitebayeva D, Sharapiyeva A, Madiyeva M, Chayzhunusova N, Zhunussov Y, Hoshi M
  • Organizer: 21th Hiroshima International Symposium: Studies on health effects of exposure to radioactive micro-particle
  • Int'l Joint Research
• [Presentation] The need for collaborative study in Ukraine and Japan of epidemiological and biological viewpoints about mental problem by disaster issues (2017)
  • Author(s): Inoue K, Noso Y, Takeichi N, Hoshi M
  • Organizer: Kiev International Symposium in 2017
  • Int'l Joint Research
• [Presentation] Thyroid and radiation exposure, Hiroshima, Chernobyl and Fukushima (2017)
  • Author(s): Takeichi N, Noso Y, Inoue K, Hoshi M
  • Organizer: Kiev International Symposium in 2017
  • Int'l Joint Research
• [Presentation] 摂食障害のある学生との面接過程 (2017)
  • Author(s): 上田規人、井上顕、岩崎泰正、渋谷恵子
  • Organizer: 第47回中国四国大学保健管理研究集会
• [Presentation] 不安症群におけるパニック症に焦点をあてた症状把握と対応の重要性～広場恐怖に関する内容も含めて～ (2017)
  • Author(s): 井上顕
  • Organizer: 第47回中国四国大学保健管理研究集会
• [Presentation] Aiming at epidemiological and statistical suicide investigations in Semey by cooperation of some fields based on the research experience in Shimane Prefecture (2017)
  • Author(s): Inoue K, Miyaoka T, Chayzhunusova N, Ezoe S, Hashioka S, Nagahama M, Nurgul O, Timur M, Zhanat S, Seksenbaev N, Bitebayeva D, Sharapiyeva A, Chegedekova S, Saimova A, Noso Y, Hoshi M, Takeichi N, Moriwaki S, Takinami Y, Takeshita H, Fujita Y, Horiguchi J
  • Organizer: XIII International Research and Practice Cinference
  • Int'l Joint Research
• [Presentation] 医療職を対象とした不安・ストレスの早期発見にむけてのpilot study: 医療に携わる多職種で検討する必要性 (2016)
  • Author(s): 井上顕、藤田委由、宮岡剛、矢野彰三、森田栄伸、石橋豊、鬼形和道、長妻久美子、天野宏紀、内田宏美、秦美恵子、江副智子、堀口淳
  • Organizer: 第112回日本精神神経学会学術総会
  • Place of Presentation: 千葉（幕張メッセ）
  • Year and Date: 2016-06-02
• [Presentation] 日本語版スマートフォン依存スケールの開発 (2016)
  • Author(s): 江副智子、飯田忠行、井上顕、戸田雅裕
  • Organizer: 第32回日本ストレス学会学術総会
  • Place of Presentation: 三鷹市（杏林大学）
• [Presentation] Factors and backgrounds in panic disorder - from several viewpoints of epidemiology and genetics - (2016)
  • Author(s): Inoue, K, Chayzhunusova, N, Nargul, O, Timur, M, Zhanat, S, Akerke, K, Ulzhan, J, Sholpan, C, Alua, S, Dina, B, Noso, Y, Takeichi, N, Hoshi, M, Takeshita, H, Takinami, Y, Rakhypbekov, TK
  • Organizer: XII International scientific-practical conference
  • Place of Presentation: セメイ、カザフスタン
  • Int'l Joint Research
• [Presentation] Necessity of measures from various sides in mental status and fatigue by disaster (2016)
  • Author(s): Inoue, K, Noso, Y, Takeichi, N, Chayzhunusova, N, Rakhypbekov, TK, Hoshi, M
  • Organizer: The 3rd Shimane-Semey International Symposium
  • Place of Presentation: 出雲市（島根大学）
  • Int'l Joint Research / Invited
• [Presentation] パニック症/パニック障害・ストレスチェックについての現況ー社会・医学の側面からー (2016)
  • Author(s): 井上顕
  • Organizer: 群馬大学社会情報学シンポジウム2016
  • Place of Presentation: 荒牧（群馬大学）
  • Invited
• [Presentation] 医学部学生の孤独感及び携帯電話依存とインターネット中毒との関係 (2015)
  • Author(s): 江副智子、戸田雅裕、飯田忠行、井上顕
  • Organizer: 第31回日本ストレス学会学術総会
  • Place of Presentation: 三鷹市（杏林大学）
  • Year and Date: 2015-11-07
• [Presentation] 女子大学生の抑うつ、不安、u-8-OHdGおよびu-5-HTに及ぼす国家試験の影響ー月経周期を考慮してー (2015)
  • Author(s): 飯田忠行、井上顕、江副智子
  • Organizer: 第31回日本ストレス学会学術総会
  • Place of Presentation: 三鷹市（杏林大学）
  • Year and Date: 2015-11-07
• [Presentation] The contents which should be grasped anxiety disoredrs - main viewpoint of panic disorder. (2015)
  • Author(s): Inoue, K, Kaiya, H, Hara, N, Okazaki, Y, Nishimura, Y
  • Organizer: XI International scientific-practical conference
  • Place of Presentation: セメイ、カザフスタン
  • Year and Date: 2015-08-29
  • Int'l Joint Research
• [Presentation] Report of depression therapy - focusing on pharmacotherapy - (2015)
  • Author(s): Inoue, K, Miyaoka, T, Okazaki, S, Nagahama, M, Horiguchi, J
  • Organizer: XI International scientific-practical conference
  • Place of Presentation: セメイ、カザフスタン
  • Year and Date: 2015-08-29
  • Int'l Joint Research
• [Book] Analyzing Human Behavior in Cyberspace (2018)
  • Author(s): Ezoe, S, Toda, M
  • Total Pages: 333
  • Publisher: IGI Global