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Structural equation modeling

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https://www.readbyqxmd.com/read/28342903/structural-equation-modeling-based-effect-size-indices-were-used-to-evaluate-and-interpret-the-impact-of-response-shift-effects
#1
M G E Verdam, F J Oort, M A G Sprangers
OBJECTIVE: The investigation of response shift in patient-reported outcomes (PROs) is important in both clinical practice and research. Insight into the presence and strength of response shift effects is necessary for a valid interpretation of change. STUDY DESIGN AND SETTING: When response shift is investigated through structural equation modeling (SEM), observed change can be decomposed into: 1) change due to recalibration response shift, 2) change due to reprioritization and/or reconceptualization response shift, and 3) change due to change in the construct of interest...
March 22, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28342883/kinetic-and-mechanistic-study-of-the-ph-dependent-activation-epoxidation-of-prodrug-treosulfan-including-the-reaction-inhibition-in-a-borate-buffer
#2
Michał Romański, Whitney Ratajczak, Franciszek Główka
A prodrug treosulfan (T) undergoes a pH-dependent activation to epoxide derivatives. The process seems to involve an intramolecular Williamson reaction (IWR) but clear kinetic evidence is lacking. Moreover, a cis-diol system present in the T structure is expected to promote complexation with boric acid. As a result, the prodrug epoxidation would be inhibited, however this phenomenon has not been investigated. In this paper, the effect of pH on the kinetics of T conversion to its monoepoxide was studied from a mechanistic point of view...
March 22, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28340168/young-children-s-acute-stress-after-a-burn-injury-disentangling-the-role-of-injury-severity-and-parental-acute-stress
#3
Ann-Christin Haag, Markus A Landolt
 Although injury severity and parental stress are strong predictors of posttraumatic adjustment in young children after burns, little is known about the interplay of these variables. This study aimed at clarifying mediation processes between injury severity and mother's, father's, and young child's acute stress.   Structural equation modeling was used to examine the relationships between injury severity and parental and child acute stress. Parents of 138 burn-injured children (ages 1-4 years) completed standardized questionnaires on average 19 days postinjury...
March 18, 2017: Journal of Pediatric Psychology
https://www.readbyqxmd.com/read/28339324/mobile-but-connected-harnessing-the-power-of-self-efficacy-and-group-support-for-weight-loss-success-through-mhealth-intervention
#4
Heewon Kim, Meara Faw, Andreas Michaelides
Despite the growing popularity of mHealth applications, their usage outcomes have received limited empirical attention. Drawing on server-level user activity data and an online survey (N = 384), this study examines the use of an mHealth application for weight loss to elucidate the ways in which it can help individuals harness the power of self-efficacy and group support to enact behavior change and accomplish their health goals. The results of structural equation modeling based on 6-month user activity data demonstrated that (a) self-efficacy had a positive impact on persistent food logging in an mHealth application; (b) social support received from a mobile group was positively associated with food logging and group participation; and (c) both food logging and group participation predicted weight loss success...
March 24, 2017: Journal of Health Communication
https://www.readbyqxmd.com/read/28339235/cross-interaction-drives-stratification-in-drying-film-of-binary-colloidal-mixtures
#5
Jiajia Zhou, Ying Jiang, Masao Doi
When a liquid film of a colloidal solution consisting of particles of different sizes is dried on a substrate, the colloids often stratify, where smaller colloids are laid upon larger colloids. This phenomenon is counterintuitive because larger colloids which have a smaller diffusion constant, are expected to remain near the surface during the drying process, leaving a layer of larger colloids on top of smaller colloids. Here we show that the phenomenon is caused by the interaction between the colloids, and can be explained by a diffusion model accounting for the interaction between the colloids...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28338224/adolescent-externalizing-behaviour-psychological-control-and-peer-rejection-transactional-links-and-dopaminergic-moderation
#6
Annelies Janssens, Wim Van Den Noortgate, Luc Goossens, Karine Verschueren, Hilde Colpin, Stephan Claes, Martijn Van Heel, Karla Van Leeuwen
This study investigated (1) reciprocal links among parental psychological control, peer rejection, and adolescent externalizing (aggressive and rule-breaking behaviour), and (2) the moderating effect of an adolescent genetic factor (biologically informed polygenic score for dopamine signalling). Three-year longitudinal data from 1,116 adolescents (51% boys; M age = 13.79) and their parents included psychological measures (adolescent-reported psychological control, peer-reported rejection, and parent-reported aggressive and rule-breaking behaviour)...
March 24, 2017: British Journal of Developmental Psychology
https://www.readbyqxmd.com/read/28337213/root-branching-is-a-leading-root-trait-of-the-plant-economics-spectrum-in-temperate-trees
#7
Rebecca Liese, Katrin Alings, Ina C Meier
Global vegetation models use conceived relationships between functional traits to simulate ecosystem responses to environmental change. In this context, the concept of the leaf economics spectrum (LES) suggests coordinated leaf trait variation, and separates species which invest resources into short-lived leaves with a high expected energy return rate from species with longer-lived leaves and slower energy return. While it has been assumed that being fast (acquisitive) or slow (conservative) is a general feature for all organ systems, the translation of the LES into a root economics spectrum (RES) for tree species has been hitherto inconclusive...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28335765/a-structural-model-of-treatment-program-and-individual-counselor-leadership-in-innovation-transfer
#8
George W Joe, Jennifer E Becan, Danica K Knight, Patrick M Flynn
BACKGROUND: A number of program-level and counselor-level factors are known to impact the adoption of treatment innovations. While program leadership is considered a primary factor, the importance of leadership among clinical staff to innovation transfer is less known. Objectives included explore (1) the influence of two leadership roles, program director and individual counselor, on recent training activity and (2) the relationship of counselor attributes on training endorsement. METHODS: The sample included 301 clinical staff in 49 treatment programs...
March 23, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28335444/hiv-education-and-welfare-services-in-primary-care-an-empirical-model-of-integration-in-brazil-s-unified-health-system
#9
Rahbel Rahman, Rogério M Pinto, Melanie M Wall
Integration of health education and welfare services in primary care systems is a key strategy to solve the multiple determinants of chronic diseases, such as Human Immunodeficiency Virus Infection and Acquired Immune Deficiency Syndrome (HIV/AIDS). However, there is a scarcity of conceptual models from which to build integration strategies. We provide a model based on cross-sectional data from 168 Community Health Agents, 62 nurses, and 32 physicians in two municipalities in Brazil's Unified Health System (UHS)...
March 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28334526/an-unusual-non-emissive-behavior-of-rubrene-j-aggregates-a-rare-violation
#10
Nikhil Aggarwal, Archita Patnaik
Structure - property correlations in Rubrene (RB) colloidal J-aggregates were unravelled by steady state and time resolved spectroscopy in conjunction with excited state density functional calculations. The RB J-aggregate with a slippage angle θ = 30.4(0), estimated from the monomeric transition dipole moment directions, exhibited a broad FWHM of 1073 cm(-1) and a 5 nm red shifted absorption band carrying a transition dipole moment (M ⃗_(λagg )= 1.80 D) almost equivalent to the monomeric dye (M ⃗_(λmon )=1...
March 23, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28334274/interactive-effects-of-multiple-climate-change-factors-on-ammonia-oxidizers-and-denitrifiers-in-a-temperate-steppe
#11
Cuijing Zhang, Jupei Shen, Yifei Sun, Juntao Wang, Limei Zhang, Zhongling Yang, Hongyan Han, Shiqiang Wan, Jizheng He
Global climate change could have profound effects on belowground microbial communities and subsequently affect soil biogeochemical processes. The interactive effects of multiple co-occurring climate change factors on microbially-mediated processes are not well understood. A four-factorial field experiment with elevated CO2, watering, nitrogen (N) addition and night warming was conducted in a temperate steppe of northern China. Real-time polymerase chain reaction and terminal-restriction fragment length polymorphism, combined with clone library techniques were applied to examine the effects of those climate change factors on N-related microbial abundance and community composition...
March 15, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28334172/evaluation-of-neoseiulus-barkeri-acari-phytoseiidae-for-control-of-eotetranychus-kankitus-acari-tetranychidae
#12
Ya-Ying Li, Ming-Xiu Liu, Hai-Wei Zhou, Chuan-Bei Tian, Guo-Hao Zhang, Yi-Qing Liu, Huai Liu, Jin-Jun Wang
Eotetranychus kankitus Ehara (Acari: Tetranychidae) is an important pest in Chinese citrus orchards. In the present study, we aimed to evaluate the potential of Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae) for the biological control of E. kankitus. A two-sex life table of E. kankitus and N. barkeri was constructed to estimate development and fecundity. The functional response and stage-specific predation rate were analyzed to evaluate predation capacity. In addition, a timing model was used to project populations of E...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28333475/intentions-to-seek-counseling-in-first-generation-and-continuing-generation-college-students
#13
Patton O Garriott, Trisha L Raque-Bogdan, Kim Yalango, Kathryn Schaefer Ziemer, Jared Utley
The growing socioeconomic diversity of higher education institutions calls for research that addresses the unique mental health needs of first-generation and continuing-generation college students. This study examined associations from environmental supports, personal stigma, self-stigma, and attitudes, to intentions to seek counseling in first- and continuing-generation college students (N = 610). Results of structural equation modeling largely supported hypothesized relationships between variables. Furthermore, the relationship between personal stigma and self-stigma was stronger for continuing-generation students while the relationship between self-stigma and attitudes was stronger for first-generation students...
March 23, 2017: Journal of Counseling Psychology
https://www.readbyqxmd.com/read/28333474/examining-the-psychology-of-working-theory-decent-work-among-sexual-minorities
#14
Richard P Douglass, Brandon L Velez, Sarah E Conlin, Ryan D Duffy, Jessica W England
Research has found heterosexist discrimination negatively relates to vocational outcomes among lesbian, gay, and bisexual (LGB) people, but no known study has examined how heterosexist discrimination relates to the attainment of decent work. Building from the Psychology of Working Theory, which proposes that specific forms of marginalization coupled with economic constraints limit a person's ability to secure decent work, the present study examined theoretically hypothesized pathways to decent work among a sample of employed sexual minority adults...
March 23, 2017: Journal of Counseling Psychology
https://www.readbyqxmd.com/read/28330918/metabolic-rate-associates-with-but-does-not-generate-covariation-between-behaviours-in-western-stutter-trilling-crickets-gryllus-integer
#15
Indrikis A Krams, Petri T Niemelä, Giedrius Trakimas, Ronalds Krams, Gordon M Burghardt, Tatjana Krama, Aare Kuusik, Marika Mänd, Markus J Rantala, Raivo Mänd, Jukka Kekäläinen, Ilkka Sirkka, Severi Luoto, Raine Kortet
The causes and consequences of among-individual variation and covariation in behaviours are of substantial interest to behavioural ecology, but the proximate mechanisms underpinning this (co)variation are still unclear. Previous research suggests metabolic rate as a potential proximate mechanism to explain behavioural covariation. We measured the resting metabolic rate (RMR), boldness and exploration in western stutter-trilling crickets, Gryllus integer, selected differentially for short and fast development over two generations...
March 29, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28330486/relationships-between-structure-process-and-outcome-to-assess-quality-of-integrated-chronic-disease-management-in-a-rural-south-african-setting-applying-a-structural-equation-model
#16
Soter Ameh, Francesc Xavier Gómez-Olivé, Kathleen Kahn, Stephen M Tollman, Kerstin Klipstein-Grobusch
BACKGROUND: South Africa faces a complex dual burden of chronic communicable and non-communicable diseases (NCDs). In response, the Integrated Chronic Disease Management (ICDM) model was initiated in primary health care (PHC) facilities in 2011 to leverage the HIV/ART programme to scale-up services for NCDs, achieve optimal patient health outcomes and improve the quality of medical care. However, little is known about the quality of care in the ICDM model. The objectives of this study were to: i) assess patients' and operational managers' satisfaction with the dimensions of ICDM services; and ii) evaluate the quality of care in the ICDM model using Avedis Donabedian's theory of relationships between structure (resources), process (clinical activities) and outcome (desired result of healthcare) constructs as a measure of quality of care...
March 23, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28329863/understanding-the-mechanisms-of-change-in-a-lifestyle-intervention-for-older-adults
#17
Christine Juang, Bob G Knight, Mike Carlson, Stacey L Schepens Niemiec, Cheryl Vigen, Florence Clark
Purpose of the Study: This study investigated the mechanisms of change underlying an activity-based lifestyle intervention, an occupational therapy program aimed at promoting healthy habits, and routines in older adults. We examined two activity-relevant factors as potential mediators linking the intervention to reduced symptoms of depression: activity frequency and global perceptions of activity significance. Social connections and perceived control were assessed to understand how activity-related factors relate to reduced symptoms of depression...
January 24, 2017: Gerontologist
https://www.readbyqxmd.com/read/28329810/wisdom-and-hard-times-the-ameliorating-effect-of-wisdom-on-the-negative-association-between-adverse-life-events-and-well-being
#18
Monika Ardelt, Dilip V Jeste
Objectives: Old age is characterized by many physical and social losses that adversely affect subjective well-being (SWB). Yet, past studies have shown that wisdom tends to be positively related to SWB in old age, particularly under adverse circumstances. We tested whether three-dimensional wisdom, measured as a combination of cognitive, reflective, and compassionate (affective) personality qualities, moderated the inverse association between adverse life events and well-being. Method: A sample of 994 adults aged 51-99 years (M = 77) from the Successful AGing Evaluation (SAGE) study and structural equation models with well-being as a latent variable were used to test the hypothesis...
October 20, 2016: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28329782/theories-of-memory-and-aging-a-look-at-the-past-and-a-glimpse-of-the-future
#19
Denise C Park, Sara B Festini
The present article reviews theories of memory and aging over the past 50 years. Particularly notable is a progression from early single-mechanism perspectives to complex multifactorial models proposed to account for commonly observed age deficits in memory function. The seminal mechanistic theories of processing speed, limited resources, and inhibitory deficits are discussed and viewed as especially important theories for understanding age-related memory decline. Additionally, advances in multivariate techniques including structural equation modeling provided new tools that led to the development of more complex multifactorial theories than existed earlier...
June 2, 2016: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28329420/towards-a-symptom-cluster-model-in-chronic-kidney-disease-a-structural-equation-approach
#20
Hayfa Almutary, Clint Douglas, Ann Bonner
AIMS: To test a symptom cluster model in chronic kidney disease patients based on the Theory of Unpleasant Symptoms, accounting for the relationships between influencing factors, symptom experience and consequences for quality of life. BACKGROUND: The evaluation of symptom clusters is a new field of scientific inquiry directed toward more focused symptom management. Yet, little is known about relationships between symptom clusters, predictors and the synergistic effect of multiple symptoms on outcomes...
March 22, 2017: Journal of Advanced Nursing
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