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Structural equation modeling

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https://www.readbyqxmd.com/read/28214784/cross-cultural-relevance-of-the-interpersonal-theory-of-suicide-across-korean-and-u-s-undergraduate-students
#1
Sooyeon Suh, Chad K Ebesutani, Christopher R Hagan, Megan L Rogers, Melanie A Hom, Fallon B Ringer, Rebecca A Bernert, Soohyun Kim, Thomas E Joiner
: This study investigated the cross-cultural relevance and validity of the Interpersonal Theory of Suicide (ITS) utilizing young adult samples from South Korea (n =554) and the United States (U.S.; n =390). To examine the ITS, all participants completed self-report questionnaires measuring Thwarted Belongingness, Perceived Burdensomeness, and Capability for Suicide. We examined whether each construct significantly predicted the severity of suicidal risk in both samples. We also determined whether the strength of the effects of Thwarted Belongingness and Perceived Burdensomeness on suicidal ideation differed between the two samples due to the greater degree of importance placed on interpersonal relationships in collectivistic cultures such as South Korea...
February 3, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28214619/transition-from-non-fickian-to-fickian-longitudinal-transport-through-3-d-rough-fractures-scale-in-sensitivity-and-roughness-dependence
#2
Lichun Wang, M Bayani Cardenas
Understanding transport in rough fractures from non-Fickian to Fickian regimes and the prediction of non-Fickian transport is critical for the development of new transport theories and many practical applications. Through computational experiments that fall within the macrodispersion regime, we first simulated and analyzed solute transport through synthetic rough fractures with stationary geometrical properties (i.e., fracture roughness σb/〈b〉 and correlation length λ, where b refers to aperture with its standard deviation σb and arithmetic mean 〈b〉) across increasing fracture longitudinal transport domain length L, with L/λ ranging from 2...
February 4, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28214436/impact-of-child-maltreatment-on-meaning-in-life-in-psychiatric-patients
#3
Sébastien Weibel, Sonia Vidal, Emilie Olié, Roland Hasler, Catherine Torriani, Paco Prada, Philippe Courtet, Sébastien Guillaume, Nader Perroud, Philippe Huguelet
Child maltreatment (CM) worsens prognosis and quality of life in several psychiatric conditions. Meaning in life is a construct which relates to the sense of purpose that one can perceive in life, and is a key aspect of recovery in psychiatric patients. The lasting impact of CM on meaning in life and its mediating variables have not been studied in patients with chronic persistent psychiatric conditions. One hundred and sixty-six patients with bipolar disorder (N=35), psychotic disorder (N=73), anorexia nervosa (N=30) or borderline personality disorder (N=28) were assessed for meaning in life (revised version of the Life Regard Index (LRI-R)), for CM (Childhood Trauma Questionnaire (CTQ)) and for internalized/externalized psychopathology...
February 13, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28211963/a-parametric-model-of-the-brain-vascular-system-for-estimation-of-the-arterial-input-function-aif-at-the-tissue-level
#4
Siamak P Nejad-Davarani, Hassan Bagher-Ebadian, James R Ewing, Douglas C Noll, Tom Mikkelsen, Michael Chopp, Quan Jiang
In this paper, we introduce a novel model of the brain vascular system, which is developed based on laws of fluid dynamics and vascular morphology. This model is used to address dispersion and delay of the arterial input function (AIF) at different levels of the vascular structure and to estimate the local AIF in DCE images. We developed a method based on the simplex algorithm and Akaike information criterion to estimate the likelihood of the contrast agent concentration signal sampled in DCE images belonging to different layers of the vascular tree or being a combination of different signal levels from different nodes of this structure...
February 17, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28211961/an-extended-vascular-model-for-less-biased-estimation-of-permeability-parameters-in-dce-t1-images
#5
Siamak P Nejad-Davarani, Hassan Bagher-Ebadian, James R Ewing, Douglas C Noll, Tom Mikkelsen, Michael Chopp, Quan Jiang
One of the key elements in dynamic contrast enhanced (DCE) image analysis is the arterial input function (AIF). Traditionally, in DCE studies a global AIF sampled from a major artery or vein is used to estimate the vascular permeability parameters; however, not addressing dispersion and delay of the AIF at the tissue level can lead to biased estimates of these parameters. To find less biased estimates of vascular permeability parameters, a vascular model of the cerebral vascular system is proposed that considers effects of dispersion of the AIF in the vessel branches, as well as extravasation of the contrast agent (CA) to the extravascular-extracellular space...
February 17, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28210994/factors-related-to-the-quality-of-life-of-older-prisoners
#6
Stefaan De Smet, Liesbeth De Donder, Denis Ryan, Sofie Van Regenmortel, Dorien Brosens, Stijn Vandevelde
PURPOSES: There is evidence of an increasing emphasis on the relevance of the quality of life-paradigm as an outcome measure for clients in geriatric, forensic, as well as correctional care. This paper aims to explore to what extent variables that were categorized according to the main areas of the Good Lives Model ('the self', 'the body' and 'social life') are related to the quality of life domains of older imprisoned offenders. METHODS: Data were collected by means of a structured questionnaire administered in individual interviews with 93 older prisoners aged 60 years and over in 16 prisons of the Dutch-speaking region in Belgium...
February 16, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28210925/prospective-associations-between-depressive-symptoms-and-the-metabolic-syndrome-the-spirited-life-study-of-methodist-pastors-in-north-carolina
#7
Timothy W Smith, David E Eagle, Rae Jean Proeschold-Bell
BACKGROUND: Metabolic syndrome (Met-S) has a robust concurrent association with depression. A small, methodologically limited literature suggests that Met-S and depression are reciprocally related over time, an association that could contribute to their overlapping influences on morbidity and mortality in cardiovascular disease, diabetes, and cancer. PURPOSE: Using a refined approach to the measurement of Met-S as a continuous latent variable comprising continuous components, this study tested the prospective associations between Met-S and depression...
February 16, 2017: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/28208833/family-environment-and-childhood-obesity-a-new-framework-with-structural-equation-modeling
#8
Hui Huang, Che Wan Jasimah Bt Wan Mohamed Radzi, Hashem Salarzadeh Jenatabadi
The main purpose of the current article is to introduce a framework of the complexity of childhood obesity based on the family environment. A conceptual model that quantifies the relationships and interactions among parental socioeconomic status, family food security level, child's food intake and certain aspects of parental feeding behaviour is presented using the structural equation modeling (SEM) concept. Structural models are analysed in terms of the direct and indirect connections among latent and measurement variables that lead to the child weight indicator...
February 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28208379/prediction-of-the-moments-in-advection-diffusion-lattice-boltzmann-method-i-truncation-dispersion-skewness-and-kurtosis
#9
Irina Ginzburg
The effect of the heterogeneity in the soil structure or the nonuniformity of the velocity field on the modeled resident time distribution (RTD) and breakthrough curves is quantified by their moments. While the first moment provides the effective velocity, the second moment is related to the longitudinal dispersion coefficient (k_{T}) in the developed Taylor regime; the third and fourth moments are characterized by their normalized values skewness (Sk) and kurtosis (Ku), respectively. The purpose of this investigation is to examine the role of the truncation corrections of the numerical scheme in k_{T}, Sk, and Ku because of their interference with the second moment, in the form of the numerical dispersion, and in the higher-order moments, by their definition...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28207534/a-case-control-study-on-the-structural-equation-model-of-the-mechanism-of-coagulation-and-fibrinolysis-imbalance-in-chronic-schistosomiasis
#10
Aiping Le, Lunli Zhang, Wei Liu, Xiaopeng Li, Jianwei Ren, An Ning
A structural equation model was used for verification with chronic schistosomiasis to investigate the coagulation-anticoagulation system imbalance and to deduce the mechanism of D-dimer (D-D) level elevation in patients with advanced schistosome hepatic disease. We detected the plasma levels of tissue-type fiber plasminogen activator (tPA), urokinase type plasminogen activator (uPA), plasmin-antiplasmin complex (PAP), plasminogen (PLG), antithrombin (AT), plasminogen activator inhibitor 1 (PAI1), D-D, factor VIII: C (FVIII:C), antithrombin-III (AT-III), PLG, protein S (PS), and protein C (PC) in the healthy people as control (69), patients with chronic schistosomiasis (150) or advanced chronic schistosomiasis (90)...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28207371/does-depressive-affect-mediate-the-relationship-between-self-care-capacity-and-nutritional-status-among-rural-older-adults-a-structural-equation-modeling-approach
#11
Seung Eun Jung, Alex J Bishop, Minjung Kim, Janice Hermann, Giyeon Kim, Jeannine Lawrence
This study examined the relationships of self-care capacity and depressive affect on nutritional status and whether depressive affect mediated the relationship of self-care capacity on nutritional status. A convenience sample of 171 rural community-dwelling older adults, 65 years and above, participated. Structural equation modeling (SEM) was conducted to test a mediation model. The hypothesized SEM model was supported with adequate fit (χ(2) (1) = 1.87, p = 0.17; CFI = 0.94; RMSEA = 0.07; SRMR = 0...
January 2017: Journal of Nutrition in Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28206801/burden-and-mental-health-among-caregivers-of-veterans-with-traumatic-brain-injury-polytrauma
#12
Joan M Griffin, Minji K Lee, Lauren R Bangerter, Courtney Harold Van Houtven, Greta Friedemann-Sánchez, Sean M Phelan, Kathleen F Carlson, Laura A Meis
Veterans who survive multiple traumatic injuries, including traumatic brain injuries (TBI), must often rely on family caregivers for ongoing care and support with reintegration. Understanding factors associated with caregiving that help or harm caregivers' health is critical for identifying appropriate and effective interventions that support caregiver health and promote the provision of quality care to veterans. This study utilized cross-sectional data from the Family and Caregiver Experiences Study, a survey of 564 caregivers caring for veterans who served after September 11, 2001, survived TBI/polytrauma during service, and received inpatient rehabilitation care in a Veterans Affairs Polytrauma Rehabilitation Center...
2017: American Journal of Orthopsychiatry
https://www.readbyqxmd.com/read/28202323/cumulative-adverse-childhood-experiences-and-sexual-satisfaction-in-sex-therapy-patients-what-role-for-symptom-complexity
#13
Noémie Bigras, Natacha Godbout, Martine Hébert, Stéphane Sabourin
INTRODUCTION: Patients consulting for sexual difficulties frequently present additional personal or relational disorders and symptoms. This is especially the case when they have experienced cumulative adverse childhood experiences (CACEs), which are associated with symptom complexity. CACEs refer to the extent to which an individual has experienced an accumulation of different types of adverse childhood experiences including sexual, physical, and psychological abuse; neglect; exposure to inter-parental violence; and bullying...
February 12, 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28199381/impact-of-the-anti-aquaporin-4-autoantibody-on-inner-retinal-structure-function-and-structure-function-associations-in-japanese-patients-with-optic-neuritis
#14
Yoshiko Matsumoto, Sotaro Mori, Kaori Ueda, Takuji Kurimoto, Akiyasu Kanamori, Yuko Yamada, Ichiro Nakashima, Makoto Nakamura
PURPOSE: An autoantibody against aquaporin-4 (AQP4 Ab) is highly specific for neuromyelitis optica spectrum disorder and plays a pathogenic role in this disease. The purpose of this study was to investigate the impact of AQP4 Ab on inner retinal structure, function, and the structure-function relationships in eyes with optic neuritis. METHODS: Thirty five eyes from 25 cases who had received visual function tests and RTVue optical coherence tomography (OCT) measurement at least six months after the latest episode of optic neuritis were enrolled...
2017: PloS One
https://www.readbyqxmd.com/read/28198088/a-self-determination-approach-to-the-understanding-of-the-impact-of-physical-activity-on-depressive-symptoms
#15
José Antonio Cecchini, Javier Fernández-Río, Antonio Méndez-Giménez, Alejandro Carriedo, José Antonio Arruza
The purpose was to test a new motivational sequence. It was hypothesized that more autonomous forms of motivation would predict the intensity of physical activity (PA), which in turn, would predict depressive symptoms. In order to evaluate self-determined motivation, the Self-Determination Index (SDI) was used. Because the reasons that can lead a person to engage in walking, moderate PA, or vigorous PA may be different, 3 independent self-determination indexes were measured (SDIWalking, SDIModerate, and SDIVigorous)...
February 15, 2017: Stress and Health: Journal of the International Society for the Investigation of Stress
https://www.readbyqxmd.com/read/28197995/explaining-academic-track-boys-underachievement-in-language-grades-not-a-lack-of-aptitude-but-students-motivational-beliefs-and-parents-perceptions
#16
Anke Heyder, Ursula Kessels, Ricarda Steinmayr
BACKGROUND: Boys earn lower grades in languages than girls. The expectancy-value model by Eccles et al. (, A series of books in psychology. Achievement and achievement motives. Psychological and sociological approaches, W.H. Freeman, San Francisco, CA, 76) is a comprehensive theoretical model for explaining gender differences in educational outcomes. In the past, most studies have focused on girls' disadvantage in math and science and on the role of the students' motivational beliefs...
February 15, 2017: British Journal of Educational Psychology
https://www.readbyqxmd.com/read/28197797/semi-classical-statistical-description-of-fr%C3%A3-hlich-condensation
#17
Jordane Preto
Fröhlich's model equations describing phonon condensation in open systems of biological relevance are reinvestigated within a semi-classical statistical framework. The main assumptions needed to deduce Fröhlich's rate equations are identified and it is shown how they lead us to write an appropriate form for the corresponding master equation. It is shown how solutions of the master equation can be numerically computed and can highlight typical features of the condensation effect. Our approach provides much more information compared to the existing ones as it allows to investigate the time evolution of the probability density function instead of following single averaged quantities...
February 14, 2017: Journal of Biological Physics
https://www.readbyqxmd.com/read/28197114/the-facebook-paradox-effects-of-facebooking-on-individuals-social-relationships-and-psychological-well-being
#18
Xiaomeng Hu, Andrew Kim, Nicholas Siwek, David Wilder
Research suggests that Facebooking can be both beneficial and detrimental for users' psychological well-being. The current study attempts to reconcile these seemingly mixed and inconsistent findings by unpacking the specific effects of Facebooking on users' online-offline social relationship satisfaction and psychological well-being. Using structural equation modeling, pathways were examined between Facebook intensity, online-offline social relationship satisfaction, perceived social support, social interaction anxiety, and psychological well-being...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28197109/achievement-goal-orientations-and-adolescents-subjective-well-being-in-school-the-mediating-roles-of-academic-social-comparison-directions
#19
Lili Tian, Tingting Yu, E Scott Huebner
The purpose of this study was to examine the multiple mediational roles of academic social comparison directions (upward academic social comparison and downward academic social comparison) on the relationships between achievement goal orientations (i.e., mastery goals, performance-approach goals, and performance-avoidance goals) and subjective well-being (SWB) in school (school satisfaction, school affect) in adolescent students in China. A total of 883 Chinese adolescent students (430 males; Mean age = 12...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28196550/genetic-and-environmental-influences-on-last-year-major-depression-in-adulthood-a-highly-heritable-stable-liability-but-strong-environmental-effects-on-1-year-prevalence
#20
K S Kendler, C O Gardner
BACKGROUND: This study seeks to clarify the contribution of temporally stable and occasion-specific genetic and environmental influences on risk for major depression (MD). METHOD: Our sample was 2153 members of female-female twin pairs from the Virginia Twin Registry. We examined four personal interview waves conducted over an 8-year period with MD in the last year defined by DSM-IV criteria. We fitted a structural equation model to the data using classic Mx. The model included genetic and environmental risk factors for a latent, stable vulnerability to MD and for episodes in each of the four waves...
February 15, 2017: Psychological Medicine
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