scholarly journals Subtypes of Persistent Postural-Perceptual Dizziness

2021 ◽  
Vol 12 ◽  
Author(s):  
Chihiro Yagi ◽  
Yuka Morita ◽  
Meiko Kitazawa ◽  
Tatsuya Yamagishi ◽  
Shinsuke Ohshima ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Factor Analysis ◽  
Visual Stimuli ◽  
Depression Scale ◽  
Active Motion ◽  
Passive Motion ◽  
Vestibular Tests ◽  
Space Motion ◽  
Demographical Data ◽  
Visual Vertigo

Background: Persistent postural-perceptual dizziness (PPPD) is a persistent chronic vestibular syndrome exacerbated by upright posture/walking, active or passive motion, and exposure to moving or complex visual stimuli. PPPD has four precursors: phobic postural vertigo, space-motion discomfort, visual vertigo, and chronic subjective dizziness. These four diseases share clinical features that form the basis of the diagnostic criteria for PPPD. Semiological similarities do not necessarily mean that PPPD is a single entity. However, if PPPD is not a single disorder but just a composite of four precursors, it may be subdivided according to the characteristics of each precursor.Objective: To test whether PPPD is a single disorder, we attempted a subtyping of PPPD.Methods: One-hundred-eight untreated patients with PPPD were enrolled in the study, who filled out the Niigata PPPD Questionnaire (NPQ) that consists of 12 questions on exacerbating factors for PPPD. A factor analysis of the patients' answers to the NPQ and a subsequent cluster analysis of the patients with PPPD using factors revealed by the factor analysis were performed. To validate our cluster classification, cluster differences were assessed using analysis of variance. Multiple comparison analyses were performed on demographical data, precipitating diseases, the Dizziness Handicap Inventory, the Hospital Anxiety and Depression Scale, and several vestibular tests to characterize each cluster.Results: Factor analysis revealed three underlying factors among the exacerbating factors in the NPQ. Exacerbation by visual stimuli (visual factor) accounted for 47.4% of total variance in the questionnaire. Exacerbation by walking/active motion (active-motion factor) and by passive motion/standing (passive-motion/standing factor) accounted for 12.0 and 7.67% of variance, respectively. Cluster analysis revealed three clusters: the visual-dominant subtype (n = 49); the active motion-dominant subtype (n = 20); and the mixed subtype (n = 39). The patients in the active motion-dominant subtype were significantly older than those in the visual-dominant subtype. There were no significant differences among the subtypes in other demographical data or conventional vestibular tests.Conclusions: The most common main exacerbating factor of PPPD was the visual factor. PPPD may be categorized into three subtypes. Conventional vestibular tests failed to point the characteristics of each subtype.

The French Version of the Revised Child Anxiety and Depression Scale (RCADS) in a Nonclinical Sample

2015 ◽  
Vol 74 (3) ◽  
pp. 119-127 ◽  
Author(s):  
Martine Bouvard ◽  
Anne Denis ◽  
Jean-Luc Roulin
Keyword(s):  
Factor Analysis ◽  
Anxiety Disorder ◽  
Confirmatory Factor Analysis ◽  
Generalized Anxiety Disorder ◽  
Child Anxiety ◽  
Depression Scale ◽  
Anxiety And Depression ◽  
Generalized Anxiety ◽  
French Version ◽  
Confirmatory Factor

This article investigates the psychometric properties of the Revised Child Anxiety and Depression Scale (RCADS). A group of 704 adolescents completed the questionnaires in their classrooms. This study examines potential confirmatory factor analysis factor models of the RCADS as well as the relationships between the RCADS and the Screen for Child Anxiety Related Emotional Disorders-Revised (SCARED-R). A subsample of 595 adolescents also completed an anxiety questionnaire (Fear Survey Schedule for Children-Revised, FSSC-R) and a depression questionnaire (Center for Epidemiological Studies Depression Scale, CES-D). Confirmatory factor analysis of the RCADS suggests that the 6-factor model reasonably fits the data. All subscales were positively intercorrelated, with rs varying between .48 (generalized anxiety disorder-major depression disorder) and .65 (generalized anxiety disorder-social phobia/obsessive-compulsive disorder). The RCADS total score and all the RCADS scales were found to have good internal consistency (> .70). The correlations between the RCADS subscales and their SCARED-R counterparts are generally substantial. Convergent validity was found with the FSSC-R and the CES-D. The study included normal adolescents aged 10 to 19. Therefore, the findings cannot be extended to children under 10, nor to a clinical population. Altogether, the French version of the RCADS showed reasonable psychometric properties.

Multivariate consumption profiling (MCP) for intelligent meter systems: a methodology to define categories and levels

2010 ◽  
Vol 10 (5) ◽  
pp. 710-720 ◽  
Author(s):  
J. L. Solanas ◽  
M. R. Cussó
Keyword(s):  
Cluster Analysis ◽  
Factor Analysis ◽  
Multivariate Analysis ◽  
Discriminant Analysis ◽  
Reference Population ◽  
Statistical Analyses ◽  
Conceptual Schema ◽  
Data Variability ◽  
Water Companies ◽  
Analyse Data

Multivariate Consumption Profiling (MCP) is a methodology to analyse the readings made by Intelligent Meter (IM) systems. Even in advanced water companies with well supported IM, full statistical analyses are not performed, since no efficient methods are available to deal with all the data items. Multivariate Analysis has been proposed as a convenient way to synthesise all IM information. MCP uses Factor Analysis, Cluster Analysis and Discriminant Analysis to analyse data variability by categories and levels, in a cyclical improvement process. MCP obtains a conceptual schema of a reference population on a set of classifying tables, one for each category. These tables are quantitative concepts to evaluate consumption, meter sizing, leakage and undermetering for populations and groupings and individual cases. They give structuring items to enhance “traditional” statistics. All the relevant data from each new meter reading can be matched to the classifying tables. A set of indexes is computed and thresholds are used to select those cases with the desired profiles. The paper gives an example of a MCP conceptual schema for five categories, three variables, and five levels, and obtains its classifying tables. It shows the use of case profiles to implement actions in accordance with the operative objectives.

scholarly journals Validation of the Japanese Version of the Center for Epidemiologic Studies Depression Scale—Revised: A Preliminary Analysis

2021 ◽  
Vol 11 (8) ◽  
pp. 107
Author(s):  
Hirohito Tsuboi ◽  
Yui Takakura ◽  
Hiromasa Tsujiguchi ◽  
Sakae Miyagi ◽  
Keita Suzuki ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Depressive Symptoms ◽  
Native Speakers ◽  
Depression Scale ◽  
Japanese Version ◽  
Population Based ◽  
Epidemiologic Studies ◽  
Community Dwelling ◽  
Two Factors ◽  
Study Population

To make the Japanese version of the CESD-R—a revised version of the Center for Epidemiologic Studies depression scale (CES-D)—in the assessment of depressive symptoms in a general population. The English version of CESD-R was translated into Japanese, and back-translated into English by three native speakers of Japanese and English; then, we selected the version most completely consistent with the original items. The CESD-R was applied to 398 community-dwelling people (191 men: 48.0%, and 207 women: 52.0%) who were over 40 years old. The Japanese version of the CES-D was also carried out in the same population. Factor analysis was performed. Additionally, the correlations between the CESD-R and CES-D results were identified. The CESD-R scores showed a significantly positive correlation with CES-D scores (r = 0.74, p < 0.0005). Analysis of the CESD-R yielded a Cronbach’s alpha result of 0.90. Factor analysis revealed one principal factor in the CESD-R, whereas the original CES-D had two factors because of reversed items. The Japanese version of the CESD-R appears to have the reliability to be applicable for assessing depressive symptoms in population-based samples. However, because the Japanese expressions for some items might be unusual, our study population was also limited; further studies on other populations and on incorporating improved Japanese terminology will be needed.

scholarly journals A systematic review of the latent structure of the Center for Epidemiologic Studies Depression Scale (CES-D) amongst adolescents

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Joanna M. Blodgett ◽  
Chantelle C. Lachance ◽  
Brendon Stubbs ◽  
Melissa Co ◽  
Yu-Tzu Wu ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Cultural Differences ◽  
Factor Structure ◽  
English Language ◽  
Depression Scale ◽  
Epidemiologic Studies ◽  
Latent Structure ◽  
Future Research ◽  
Primary Analysis ◽  
The Usa

Abstract Background The Centre for Epidemiologic Studies Depression Scale (CES-D) is a commonly used psychometric scale of depression. A four-factor structure (depressed affect, positive affect, somatic symptoms, and interpersonal difficulties) was initially identified in an American sample aged 18 to 65. Despite emerging evidence, a latent structure has not been established in adolescents. This review aimed to investigate the factor structure of the CES-D in adolescents. Methods We searched Web of Science, PsychINFO and Scopus and included peer-reviewed, original studies assessing the factor structure of the 20-item CES-D in adolescents aged ≤18. Two independent researchers screened results and extracted data. Results Thirteen studies met the inclusion criteria and were primarily from school-based samples in the USA or Asia. Studies that conducted confirmatory factor analysis (CFA; n = 9) reported a four-factor structure consistent with the original factor structure; these studies were primarily USA-based. Conversely, studies that conducted exploratory factor analysis (EFA) reported distinct two or three factor structures (n = 4) and were primarily based in Asia. Limitations Studies in a non-English language and those that included individuals aged > 18 years were excluded. Ethnic or cultural differences as well as different analytical methods impacted generalisability of results. The use of CFA as the primary analysis may have biased towards a four-factor structure. Conclusions A four-factor CES-D structure was an appropriate fit for adolescents in Western countries; further research is required to determine the fit in in Asian countries. This has important implications for clinical use of the scale. Future research should consider how cultural differences shape the experience of depression in adolescents.

scholarly journals Microscopic Object Classification through Passive Motion Observations with Holographic Microscopy

Life ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 793
Author(s):  
Devan Rouzie ◽  
Christian Lindensmith ◽  
Jay Nadeau
Keyword(s):  
Digital Holographic Microscopy ◽  
Resolution Limit ◽  
Entire Volume ◽  
Active Motion ◽  
Microscopic Object ◽  
Passive Motion ◽  
Large Numbers ◽  
Composition And Structure ◽  
Holographic Microscopy ◽  
Living Objects

Digital holographic microscopy provides the ability to observe throughout a volume that is large compared to its resolution without the need to actively refocus to capture the entire volume. This enables simultaneous observations of large numbers of small objects within such a volume. We have constructed a microscope that can observe a volume of 0.4 µm × 0.4 µm × 1.0 µm with submicrometer resolution (in xy) and 2 µm resolution (in z) for observation of microorganisms and minerals in liquid environments on Earth and on potential planetary missions. Because environmental samples are likely to contain mixtures of inorganics and microorganisms of comparable sizes near the resolution limit of the instrument, discrimination between living and non-living objects may be difficult. The active motion of motile organisms can be used to readily distinguish them from non-motile objects (live or inorganic), but additional methods are required to distinguish non-motile organisms and inorganic objects that are of comparable size but different composition and structure. We demonstrate the use of passive motion to make this discrimination by evaluating diffusion and buoyancy characteristics of cells, styrene beads, alumina particles, and gas-filled vesicles of micron scale in the field of view.

Perkutane, antegrade K-Draht-Osteosynthese bei Fingergrundgliedfrakturen: Vergleich zwischen frühfunktioneller und statischer Nachbehandlung

2021 ◽  
Vol 53 (05) ◽  
pp. 467-474
Author(s):  
Ines Ana Ederer ◽  
Johannes von Fraunberg ◽  
Jonas Kolbenschlag ◽  
Andreas Nusche ◽  
Adrien Daigeler ◽  
...  
Keyword(s):  
Postoperative Komplikationen ◽  
Retrospektive Studie ◽  
Dash Score ◽  
Active Motion ◽  
Fand Sich ◽  
Passive Motion ◽  
Total Active Motion

Zusammenfassung Ziel Diese retrospektive Studie vergleicht die klinischen Ergebnisse der frühfunktionellen Nachbehandlung mit den Ergebnissen mittels 6-wöchiger Schienenruhigstellung nachbehandelter Fingergrundgliedfrakturen nach perkutaner, antegrader K-Draht-Osteosynthese. Patienten und Methoden Von insgesamt 90 Patienten, die zwischen 2010 und 2017 aufgrund einer isolierten Fingergrundgliedfraktur nach geschlossener Reposition mittels perkutaner, antegrader K-Draht-Osteosynthese operativ versorgt wurden, konnten 46 (17 Frauen und 29 Männer mit einem mittleren Alter von 42,8 Jahren) im Mittel nach 18,5 Monaten nachuntersucht werden. Bei 28 Patienten war eine frühfunktionelle, bei 18 eine statische Nachbehandlung erfolgt. Beide Gruppen unterschieden sich nicht statistisch signifikant bzgl. des Alters, der Geschlechtsverteilung, der Frakturlokalisation und -morphologie, des Unfallmechanismus und der Dauer der Operation. Bei der Nachuntersuchung wurde die aktive und passive Beweglichkeit des operierten Fingers (total active motion [TAM] und total passive motion [TPM], Fingerkuppen-Hohlhand-Abstand [FKHA], Nagelrand-verlängerter-Handrückenebenen-Abstand [NHREA]) und des korrespondierenden, unverletzten Fingers der Gegenseite gemessen und in Relation zueinander gesetzt (TAMrel, TPMrel). Des Weiteren wurde die Kraft bei verschiedenen Griffformen bestimmt und in Relation zur Kraft der unverletzten Gegenseite gesetzt. Intra- und postoperative Komplikationen, der DASH-Score und die Zeit bis zur Wiederaufnahme der Arbeitstätigkeit wurden erfasst. Ergebnisse Keine signifikanten Unterschiede zwischen den beiden Gruppen konnten bzgl. der Häufigkeit von Komplikationen und notwendiger Revisionen, der Fingerbeweglichkeit und Kraft festgestellt werden. Patienten mit aktiver Nachbehandlung kehrten im Vergleich zu Patienten mit statischer Nachbehandlung jedoch signifikant früher an ihre Arbeitsplätze zurück (2,5 vs. 9,0 Wochen nach operativer Versorgung, p = 0,035). Der DASH-Score in der Gruppe mit aktiver Nachbehandlung war mit 1,7 Punkten etwas niedriger als in der Gruppe mit statischer Nachbehandlung mit 2,5 Punkten (p = 0,269). Schlussfolgerung Patienten mit frühfunktioneller Nachbehandlung waren signifikant kürzer arbeitsunfähig. Zum Nachuntersuchungszeitpunkt fand sich kein Unterschied in der globalen Fingerbeweglichkeit beider Gruppen. Bei gegebener Compliance kann auf eine postoperative Ruhigstellung verzichtet werden.

scholarly journals “Why (Should) I Do Something for the Environment?” Profiles of Flemish Adolescents’ Motivation Toward the Environment

2018 ◽  
Vol 10 (7) ◽  
pp. 2579 ◽  
Author(s):  
Wanda Sass ◽  
Jelle Pauw ◽  
Vincent Donche ◽  
Peter Petegem
Keyword(s):  
Cluster Analysis ◽  
Factor Analysis ◽  
Secondary School ◽  
Secondary School Students ◽  
School Students ◽  
The North ◽  
Dutch Translation ◽  
Confirmatory Factor ◽  
Senior Secondary ◽  
Person Centered Approach

The Motivation Toward the Environment Scale (MTES), developed in Canada, measures people’s self-determined motivation for doing something for the environment. Answering the call by its original developers, this study further validated the MTES within a sample of 779 Dutch-speaking senior secondary school students, aged 17 to 19, in the north of Belgium. More specifically, reliability and construct validity of a Dutch translation of the MTES were verified. To this measure, confirmatory factor analysis was used, and the hypothesized simplex structure was tested through correlation analyses. Results confirmed the reliability of the MTES and a five-scale version of the MTES, excluding identified motivation, is introduced. This variable-centered approach was complemented by the adoption of a person-centered approach for identifying MTES profiles. Using cluster analysis, four meaningful MTES profiles emerged, with amotivation scoring medium to high in all but one. Theoretical implications of the findings and suggestions for interventions and further research are discussed.

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