Psychometric evaluation of the Czech Beck Depression Inventory-II in a sample of depressed patients and healthy controls.

OBJECTIVE: The goal of this study was to explore reliability and validity of the Czech revised Beck Depression Inventory (BDI-II) and to identify the best cut-off for a correct identification of a potentially depressed individual. METHOD: Two groups of adult participants entered the study. The first group consisted of 177 patients with depression (F32x or F33x according to the ICD-10). Furthermore, there were 767 healthy controls. Each participant filled in BDI-II. A part of the patients also completed the Beck Anxiety Inventory (BAI), the Dissociative Experiences Scale (DES), and the subjective Clinical Global Impression scale (CGI). A part of the controls filled in the Adult Dispositional Hope Scale (ADHS) and the Satisfaction with Life Scale (SWLS). RESULT: The average patients' BDI-II score was 30.8±10.3, the mean controls' score was 7.2±6.8. The internal consistency of the inventory was excellent (the ordinal alpha coefficient was 0.90 for the patients and 0.93 for the controls). The stability in time, measured two weeks apart, was also good (intra-class correlation coefficient r=0.83 for the patients and 0.77 for the controls). The exploratory factor analysis of the patients showed a three-factor solution, while the analysis of the controls' data identified two factors. As expected, BDI-II significantly positively correlated with BAI, DES, and CGI and was negatively connected to ADHS and SWLS. The cut-off score with the best sensitivity and specificity was 17. CONCLUSION: The Czech BDI-II shows adequate psychometric characteristics.

Microstructural, Mechanical and Corrosion Characteristics of Degradable PM Biomaterials Made from Copper-Coated Iron Powders.

Copper-containing iron-based materials have recently been recognized as potential biomaterials possessing antimicrobial ability. Since then, iron-copper systems have been prepared by different methods and investigated. This article is focused on PM materials made from composite powders. The powders, each particle of which consisted of an iron core and a copper shell, were prepared by electroplating. Test-pieces with copper contents of 0, 3.2, and 8 wt.% were fabricated by pressing and sintering from iron and composite powders. Some microstructural, mechanical, and corrosion characteristics of test-pieces were examined. Microstructures were composed of pores and iron grains with alloyed peripheral regions and copper-free cores. As the copper content in test-pieces was increased, their density and Young's modulus decreased, and macrohardness, corrosion potential and corrosion current density increased. Likely causes of density and Young's modulus reduction were higher porosity, low enough copper content, and compliant inclusions in stiff matrix. The increase in macrohardness was attributed to the precipitation hardening which prevailed over softening induced by pores. The increase in corrosion potential and corrosion current density was most likely due to the presence of more noble phase providing surfaces for a faster cathodic reaction.

Positive Self-Relation Scale - development and psychometric properties.

PURPOSE: Self-relation is a profound connection that influences one's life. As such, it presents an important topic for various areas of research and psychotherapy. The goal of this study was to develop and evaluate a brief scale that would assess positive aspects of self-relation. SAMPLE AND METHODS: The Positive Self-Relation Scale (PSRS) consists of 16 items divided into 4 subscales - Self-Acceptance, Self-Confidence, Authenticity and Assertiveness, and Fulfilled Experience. Two samples were used for the evaluation of its content and factor structure. The final sample's data used for validation assessment. This sample consisted of 1234 adults from a general population (mean age 34.8±14.2 years, 70.8% women). All participants completed PSRS. Subgroups also filled in Rosenberg Self-Esteem Scale (RSES), Adult Dispositional Hope Scale (ADHS), Beck Depression Inventory-II (BDI-II), Liebowitz Social Anxiety Scale (LSAS), and Dissociative Experiences Scale (DES). RESULTS: Differences in scores among demographic groups were small to none. Internal consistency was good (Composite Reliability Coefficients - the whole scale: 0.93; the subscales: 0.73-0.80). Temporal stability, assessed 2 weeks apart, was satisfactory (intraclass correlation coefficients - the whole scale: 0.86, the subscales: 0.60-0.82). Factor loadings in confirmatory factor analysis were 0.45-0.80, fit indices mostly showed an adequate model. The correlation coefficients between PSRS and RSES/ADHS were strong (r=0.79/0.55). The scale also strongly correlated with LSAS, BDI-II, and DES (r=-0.61/-0.48/-0.30, all ps<0.001). CONCLUSION: PSRS showed adequate psychometric properties in the general population. Future studies should include clinical samples. The areas of application lie mainly in research and psychotherapy.