Kitamura Institute of Mental Health Tokyo

Tokyo, Japan

Kitamura Institute of Mental Health Tokyo

Tokyo, Japan
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Matsunaga A.,National Institute of Mental Health | Matsunaga A.,Kitamura Institute of Mental Health Tokyo | Takauma F.,Okayama University | Tada K.,National Hospital Organization | And 2 more authors.
Early Human Development | Year: 2017

Background Difficulty of maternal bonding towards a baby is widely recognised. It is unclear whether this phenomenon is dimensional or categorical. If categorical, an optimal cut-off score of a screening instrument is needed in clinical settings. Aims In this study, we investigated whether maternal bonding is dimensional or categorical phenomenon and try to set optimal cut-off score of screening instruments. Methods Self-report questionnaire studies were conducted in a general hospital and four antenatal clinics. Two-step cluster analysis was conducted for the Mother-to-Infant Bonding Scale (MIBS) subscale scores in 723 mothers of neonates. ROC curves and optimal cut-off points of the MIBS scores were calculated based on cluster-analysis derived groups. Results A 2-cluster structure appeared: “normal” (n = 619) vs. “pathological maternal bonding” (n = 104). Mothers of the latter category scored significantly higher in terms of postnatal depression and neonatal abuse than those of the former category. AUC of the ROC curve by the total MIBS scores both 5 days and 1 month after childbirth were > 0.9. The optimal cut off scores were 3/4 at 5 days, and 4/5 at 1 month, after childbirth. Conclusions There was a group of mothers with high MIBS scores discretely different from those with low MIBS scores. MIBS may be a useful tool to identify mothers with a severe bonding disorder that needs clinical intervention. © 2017 Elsevier B.V.

Lu X.,Kumamoto University | Lu X.,Kitamura Institute of Mental Health Tokyo | Watanabe J.,Kumamoto University | Watanabe J.,Kitamura Institute of Mental Health Tokyo | And 8 more authors.
Computers in Human Behavior | Year: 2011

Unhealthy use of the Internet and mobile phones is a health issue in Japan. We solicited participation in this questionnaire-based study from the employees of a city office in Kumamoto. A total of 92 men and 54 women filled in the Internet Addiction Questionnaire (IAQ), the Self-perception of Text-message Dependency Scale (STDS), and the Hospital Anxiety and Depression Scale (HADS). The prevalence of "light Internet addiction" and "severe Internet addiction" were 33.7% and 6.1% for men whereas they were 24.6% and 1.8% for women. The prevalence of "light mobile phone text-message addiction" was 3.1% for men and 5.4% for women. There were no cases of "sever text-message addiction". We found a two-factor structure for the IAQ and a three-factor structure for the STDS. We also performed an EFA of the IAQ and STDS subscales, and this revealed a two-factor structure - Internet Dependency and Text-message Dependency. An STDS subscale, Relationship Maintenance, showed a moderate factor loading of the factor that reflected unhealthy Internet use. In a path analysis, Depression was associated with both Internet Dependency and Text-message Dependency whereas Anxiety was associated negatively with Text-message Dependency. These results suggest applicability of the IAQ and STDS and that Internet and Text-message Dependences are factorially distinct. © 2011 Elsevier Ltd. All rights reserved.

Lu X.,Kumamoto University | Katoh T.,Kumamoto University | Chen Z.,Chengdu Medical College | Nagata T.,Kyushu University of Nursing and Social Welfare | And 2 more authors.
Psychiatry Research | Year: 2014

Text messaging may be excessive and young people may be dependent on it. We distributed the Self-perception of Text-message Dependency Scale (STDS), Hospital Anxiety and Depression Scale (HADS), Temperament and Character Inventory (TCI), and Relationship Questionnaire (RQ) to 223 Japanese university students in a two-wave study, separated by a 5-month interval. The STDS yielded a three-factor structure. The STDS scores across the two measurement occasions were stable across time (except for the Relationship Maintenance subscale). A hierarchical cluster analysis suggested a three-class structure interpreted as Normal Users, Excessive Users, and Dependent Users. Excessive Users and Dependent Users were characterized by a young age at initial mobile phone use, more frequent use of text messaging, higher Novelty Seeking, and better Other-Model patterns of adult attachment. Unlike Excessive Users, Dependent Users were characterized by lower Self-directedness, poorer Self-Model of adult attachment, and higher anxiety and depression. The Excessive Users, but not the Dependent Users, were characterized by high Reward Dependence and Co-operativeness. The present study demonstrated that the STDS has a robust factor structure, good construct validity, and temporal stability (except for Relationship Maintenance subscale); students could be classified into normal, excessive, and Dependent Users of the text messaging; and Dependent Users were characterized by Excessive Use and personality immaturity. © 2013 Elsevier Ireland Ltd.

Chen Z.,Chengdu Medical College | Lu X.,Kumamoto University | Kitamura T.,Kitamura Institute of Mental Health Tokyo
Comprehensive Psychiatry | Year: 2013

Objective: To examine the factor structure of the 144-item Chinese version of the Temperament and Character Inventory (TCI) and its association with age and gender in a large non-clinical population. Method: We recruited 1966 non-clinical participants in China who completed the TCI Chinese version. They were randomly divided into two independent samples. One sample (n = 983) was used for exploratory factor analysis (EFA), and the other (n = 983) for confirmatory factor analysis (CFA). Results: An EFA suggested a four-factor structure for temperament domains and a three-factor structure for character domains. This was confirmed by a CFA. Women showed significantly higher scores on harm avoidance, reward dependence, co-operativeness, and self-transcendence than men. Age affected every subscale expect for reward dependence. Conclusion: The factor structure of the Chinese TCI was similar to the original factor structure, with some differences reflecting the culture of a Chinese population. © 2013 Elsevier Inc.

Chen Z.,Chengdu Medical College | Lu X.,Kumamoto University | Kitamura T.,Kitamura Institute of Mental Health Tokyo
Depression Research and Treatment | Year: 2011

Objective. To examine the relations between personality traits and syndromes of depression in a nonclinical Chinese population. Method. We recruited 469 nonclinical participants in China. They completed the Chinese version temperament and character inventory (TCI) and self-rating depression scale (SDS). A structural equation model was used to rate the relation between seven TCI scales and the three SDS subscale scores (based on Shafer's meta-analysis of the SDS items factor analyses). This was based on the assumption that the three depression subscales would be predicted by the temperament and character subscales, whereas the character subscales would be predicted by the temperament subscales. Results. The positive symptoms scores were predicted by low self-directedness (SD), cooperativeness (C), reward dependence (RD), and persistence (P) as well as older age. The negative symptoms scores were predicted only by an older age. The somatic symptoms scores were predicted by high SD. Conclusion. Syndromes of depression are differentially associated with temperament and character patterns. It was mainly the positive symptoms scores that were predicted by the TCI scores. The effects of harm avoidance (HA) on the positive symptoms scores could be mediated by low SD and C. © 2011 Zi Chen et al.

Lu X.,Kumamoto University | Chen Z.,Chengdu Medical College | Cui X.,Kumamoto University | Uji M.,Kumamoto University | And 6 more authors.
Depression Research and Treatment | Year: 2012

Objective. To examine the effects of temperament and character profiles on state and trait depression and anxiety in a Japanese youth population. Method. Japanese university students were solicited for participation in a two-wave study, with assessments performed at Time 1 (T1) and Time 2 (T2), separated by a five-month interval. A total of 184 students completed the Japanese version of the temperament and character inventory (TCI) at T1 and the Hospital Anxiety and Depression Scale (HADS) at T1 and T2. We posited two latent variables, trait depression and anxiety, composed of the T1 and T2 HADS depression and anxiety scores, respectively. We also posited that temperament domain traits would predict character domain traits, and that all the personality traits would be linked to trait depression and anxiety and also predict T2 depression and anxiety. Results. Structural regression modeling showed that (1) only high Novelty Seeking predicted T2 Anxiety score, (2) trait depression and anxiety were linked to high harm avoidance and low self-directedness, and (3) trait depression was linked to high self-transcendence whereas trait anxiety was linked to low reward dependence, persistence, and cooperativeness. Conclusion. The characteristic associations between TCI subscales and depression and anxiety were limited to the trait rather than state aspects of depression and anxiety. © 2012 Xi Lu et al.

Minatani M.,University of Tokyo | Minatani M.,Kitamura Institute of Mental Health Tokyo | Kita S.,University of Tokyo | Kita S.,Kitamura Institute of Mental Health Tokyo | And 6 more authors.
Depression Research and Treatment | Year: 2013

Background. To examine the effects of temperament and character domains on depression during pregnancy. Methods. We examined 601 pregnant women using a questionnaire that included the Edinburgh Postnatal Depression Scale (EPDS), the Temperament and Character Inventory (TCI), and demographic variables. Results. In a hierarchical regression analysis, severity of depression during pregnancy was predicted by the women's negative response towards the current pregnancy, low self-directedness, and high harm avoidance, persistence, and self-transcendence. Conclusion. Depression during pregnancy is predicted by personality traits as well as women's negative attitudes towards the current pregnancy. © 2013 Mariko Minatani et al.

PubMed | Kumamoto University, Aso Health Center and Kitamura Institute of Mental Health Tokyo
Type: Journal Article | Journal: Healthcare (Basel, Switzerland) | Year: 2016

Negative attitudes of mothers towards their infant is conceptualized as postpartum bonding disorder, which leads to serious health problems in perinatal health care. However, its measurement still remains to be standardized. Our aim was to examine and confirm the psychometric properties of the Postnatal Bonding Questionnaire (PBQ) in Japanese mothers. We distributed a set of questionnaires to community mothers and studied 392 mothers who returned the questionnaires at 1 month after childbirth. Our model was compared with three other models derived from previous studies. In a randomly halved sample, an exploratory factor analysis yielded a three-factor structure: Anger and Restrictedness, Lack of Affection, and Rejection and Fear. This factor structure was cross-validated by a confirmatory factor analysis using the other halved sample. The three subscales showed satisfactory internal consistency. The three PBQ subscale scores were correlated with depression and psychological abuse scores. Their test-retest reliability between day 5 and 1 month after childbirth was measured by intraclass correlation coefficients between 0.76 and 0.83. The Akaike Information Criteria of our model was better than the original four-factor model of Brockington. The present study indicates that the PBQ is a reliable and valid measure of bonding difficulties of Japanese mothers with neonates.

Takagishi Y.,Kumamoto University | Sakata M.,Yoshida Hospital | Kitamura T.,Kitamura Institute of Mental Health Tokyo
Industrial Health | Year: 2012

In Japan, mergers of cities, towns, and villages have occurred rapidly as a result of the Special Law on the Merger of Municipalities, enacted in 2005. These mergers may impact civil servants' psychological adjustment. We developed the Municipal Merger Stress Questionnaire (MMSQ) to measure the impact of the municipal mergers and collected responses from 570 employees who had experienced a municipal merger (Study 1). We examined the relationships among the impact of municipal merger, Stress Responses, Self-concept (self-esteem and interpersonal dependency), and Social Support (Study 2). Two factors (Increased Workload and Worthlessness) were derived from the MMSQ in Study 1. Additionally, a structural equation model showed that the impact of the loss of value of their job (Worthlessness) related to the psychological stress responses, while job discretion did not differentiate an entire stress situation in Study 2. The result implies that psychological aspects of interventions focused on worthlessness are required to maintain good mental health of public servants at workplaces. © 2012 National Institute of Occupational Safety and Health.

PubMed | Kumamoto Paediatric Association, Kitamura Institute of Mental Health Tokyo and University of Tokyo
Type: Journal Article | Journal: Pediatrics international : official journal of the Japan Pediatric Society | Year: 2015

Accuracy of temperament assessment is a prerequisite in research studies. To identify the extent to which parental assessment of child temperament is biased by their personal attributes, we proposed a new structural equation model, in which biases of parental attributes in their assessment of child temperament can be separated from the true (i.e. non-biased) associations between the two.We examined 234 father-mother pairs using questionnaires including Emotionality, Activity, Sociability, and Impulsivity; Social Desirability Scale; Hospital Anxiety and Depression Scale; Temperament and Character Inventory; and State-Trait Anger Expression Inventory.Paternal Depression and Persistence, maternal Trait Anger, and parental Novelty Seeking showed significant bias in assessment of Emotionality. Maternal Self-transcendence showed significant bias in assessment of child Impulsivity.Researchers should be cautious about biases in parental assessment of childrens Emotionality and Impulsivity, but other temperament traits may be free from such biases.

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