Search results for "Statistica"
showing 10 items of 5969 documents
The determinants of subjective economic well-being: an analysis on Italian-Silc data
2011
Using Italian data on Income and living conditions for the year 2005, the paper investigates the main determinants of households’ subjective economic well-being by means of a Partial Proportional Ordered Logit Model. According to a joint subjective and objective perspective of analysis, we use as dependent variable the perceived ability of households to make ends meet. Whereas, we use as explanatory variables some objective aspects of living conditions relating to housing, financial equilibrium, possession of durables and quality of residence place and some socio-demographic characteristics. The empirical results show that the financial strain is the most relevant dimension of living condit…
Model interpretation from the additive elements of the PWRSS in GLMMs
2013
Generalized Linear Mixed models(GLMMs)have rapidly become a widely used tool for modelling clustered and longitudinal data with non-Normal responses. Although a large amount of work has been done in the literature on likelihood-based inference on GLMMs,little seems to have been done on the decomposition of the total variability associated to the different components of a mixed model.In this work we try to generalize the idea of likelihood additive elements Whittaker,1984), proposed in the context of GLMs,to the case of GLMMs by using the Penalized Weighted Residual Sum of Squares(PWRSS). The proposal is illustrated by means of areal application.
High-definition imaging in endoscopic transsphenoidal pituitary surgery.
2011
Background The transsphenoidal approach to sellar lesions has evolved enormously since its first description in the early 20th century. Endoscopic surgical strategies have become an integral part of the surgical armamentarium. More recently, high-definition (HD) digital cameras with better image resolution were introduced, although their value for the surgical procedure remains equivocal. The purpose of this study was to compare the image quality of a standard-definition (SD) camera with a new HD camera. Methods A transsphenoidal pituitary adenomectomy was recorded simultaneously in HD and SD resolution. Eight experienced neurosurgeons were asked to identify predefined as well as not predef…
Psychiatric comorbidity in compulsive sexual behavior disorder (CSBD)
2020
This is a post-print version of the paper. To cite this article: Ballester-Arnal, R., Castro-Calvo, J., Giménez-García, C., Gil-Juliá, B. & Gil-Llario, M.D (2020). Psychiatric comorbidity in Compulsive Sexual Behavior Disorder (CSBD). Addictive Behaviors, 107, 106384. https://doi.org/10.1016/j.addbeh.2020.106384 Compulsive Sexual Behavior Disorder (CSBD) is characterized by a persistent failure to control intense and recurrent sexual impulses, urges, and/or thoughts, resulting in repetitive sexual behavior that causes a marked impairment in important areas of functioning. Data collected from clinical populations suggest that CSBD frequently co-occurs with other Axis I and II psychiatric dis…
EXPRESSIONS OF DISCOMFORT IN ADOLESCENTS. CLINICAL REFLECTIONS RESULTING FROM AN EXPLORATORY STUDY OF A GROUP OF STUDENTS
2006
Obiettivo. Considerati la diffusione e l’incremento dei comportamenti aggressivi e violenti, specie quelli che trovano come radicale comune la mancanza di un’effettiva motivazione e l’efferatezza, la nostra ricerca si è posta l’obiettivo di rintracciare gli indicatori e i segni predittivi di tali comportamenti. La letteratura, inoltre, dimostra che gli indicatori e i segni predittivi di maggiore affidabilità sono quelli legati alle invarianti strutturali (per esempio le strategie difensive, la capacità di controllo degli impulsi). Metodi. È stato realizzato, con un piano di ricerca trasversale, uno studio clinico di confronto reclutando un gruppo di adolescenti (26 soggetti di sesso maschil…
Size discrepancy of apical bases and treatment success in angle Class III malocclusion.
2001
The aim of this retrospective clinical study was to measure the apical bases and determine their size relationship in Class III malocclusion cases before and after orthodontic treatment, in order to evaluate their significance for the treatment success. Maxillary and mandibular apical bases were measured on study models of 104 Class III cases treated by conventional orthodontics, using a specifically constructed conveyance apparatus, and related to each other as an index. Treatment success was quantitatively assessed as the percentage change of PAR scores obtained from the pretreatment and posttreatment study models. Statistically significant relationships were disclosed between the measure…
Alcohol consumption and risk of uterine myoma: A systematic review and meta analysis
2017
Background The published data about alcohol consumption and uterine myoma are scanty and controversial: some studies found positive association whereas other studies showed no association. Objectives To conduct a systematic review and meta-analysis to determine whether alcohol is a risk factor for myoma. Search strategy A MEDLINE/EMBASE search was carried out, supplemented by manual searches of bibliographies of the selected studies. Selection criteria Articles published as full-length papers in English. In the review we included all identified studies. Otherwise, the inclusion criteria for studies included in the meta-analysis were: a) case-control or cohort studies, reporting original dat…
Psychometric evaluations of the Life Orientation Test-Revised (LOT-R), based on nine samples
2021
The aim of this study was to examine psychometric properties of the Life Orientation Test-Revised (LOT-R).The LOT-R was administered in five clinical samples, three samples of the adult general population, and one sample of adolescents. Seven of the studies were performed in Germany and two in Colombia. All of the sample sizes were above 300.Cronbach's alpha coefficients were between .57 and .75 for the eight adult samples, the correlations between the scales optimism and pessimism ranged from -.05 to -.37, and the coefficients of temporal stability (test-retest correlations) of the scales ranged from .43 to .69. There were no systematic age and gender effects observed in the nine studies. …
Sister-chromatid exchange in cultured lymphocytes of ewes and their newborn lambs
1984
The incidence of sister-chromatid exchange (SCE) in cultured lymphocytes of ewes and their newborn lambs was determined using the BrdU-Giemsa technique. In all ewe-lamb pairs, the SCE rate in the lambs was less than that of the ewes. The mean SCE frequencies per chromosome of the ewes after lambing and of the newborn lambs were 0.1909 and 0.1581, respectively. The statistical analysis shows that a significant difference exists between SCE in the adult female sheep and their lambs. At the same time, a negative correlation was observed between SCE rate and cell proliferation. The results of this study are compared with those of previous reports on age-dependency of SCE.
Nonlinear coupling is absent in acute myocardial patients but not healthy subjects.
2008
We investigated whether autonomic nervous system imbalance imposed by pharmacological blockades and associated with acute myocardial infarction (AMI) is manifested as modifications of the nonlinear interactions in heart rate variability signal using a statistically based bispectrum method. The statistically based bispectrum method is an ideal approach for identifying nonlinear couplings in a system and overcomes the previous limitation of determining in an ad hoc way the presence of such interactions. Using the improved bispectrum method, we found significant nonlinear interactions in healthy young subjects, which were abolished by the administration of atropine but were still present afte…