Search results for "Reproducibility"
showing 10 items of 1976 documents
Reproducibility of the WHO histological criteria for the diagnosis of Philadelphia chromosome-negative myeloproliferative neoplasms
2014
This study, performed on behalf of the Italian Registry of Thrombocythaemias (Registro Italiano Trombocitemie), aimed to test the inter-observer reproducibility of the histological parameters proposed by the WHO classification for the diagnosis of the Philadelphia chromosome-negative myeloproliferative neoplasms. A series of 103 bone marrow biopsy samples of Philadelphia chromosome-negative myeloproliferative neoplasms consecutively collected in 2004 were classified according to the WHO criteria as follows: essential thrombocythaemia (n=34), primary myelofibrosis (n=44) and polycythaemia vera (n=25). Two independent groups of pathologists reviewed the bone marrow biopsies. The first group w…
Magnetic resonance imaging findings and their relationships in the thoracic and lumbar spine. Insights into the etiopathogenesis of spinal degenerati…
1995
Study design Descriptive epidemiologic study about magnetic resonance imaging findings in the spine. Objectives To describe the prevalence of magnetic resonance imaging findings in a general population at spinal levels T6-S1, and to examine the relationships of these findings within each spinal level and between levels. Summary of background data The prevalence of specific findings and the associations between findings and spinal levels can provide general insights into the etiopathogenesis of spinal degeneration. Methods Subjects consisted of 232 men from a population sample (mean age 49.3 years). Signal intensity, disc bulging, disc herniation, and endplate irregularities were among 11 fi…
Cross validation of the 1-mile walking test for men with mental retardation.
1997
The purpose of this study was to cross validate the equation developed by Rintala et al. (1992) to estimate the cardiorespiratory efficiency of men with mental retardation (MR). Subjects were 19 healthy men (27 ± 8 yr) with MR (IQ = 58 ± 12). Following familiarization, a graded maximal treadmill test and two 1-mile walk tests (Rockport Fitness Walking Test, RFWT) were administered. The peak VO 2 value was the criterion measure used to cross validate the equation. The equation was: Peak VO 2 (ml.kg -1 .min -1 ) = 101.92 - 2.356 (MILE) -0.420 (WEIGHT). The mean differences were 2.04 (MILE 1 )(P = 0.02) and 2.43 (MILE 2 )(P = 0.004) ml.kg -1 .min -1 . A significant positive correlation was fou…
Predictive value for disease progression of serum thyroglobulin levels measured in the postoperative period and after (131)I ablation therapy in pati…
2004
The aim of our study was to evaluate and compare in thyroid cancer patients the predictive value for disease progression of thyroglobulin (Tg) levels measured under thyroid-stimulating hormone (TSH) stimulation, in the postoperative period just before (131)I ablative therapy and at the time of control 6-12 mo later.Two-hundred twelve consecutive patients treated for a well-differentiated thyroid carcinoma (184 papillary, 28 follicular) with no initial distant metastases were retrospectively studied. All patients had a total or near-total thyroidectomy followed by ablation with 3.7 GBq (131)I. Tg levels were determined just before ablative therapy (Tg1) and 6-12 mo later (Tg2). Thresholds of…
The Basic Psychological Need Satisfaction and Frustration Scale: Construct and Predictive Validity in the Italian Context
2020
The Basic Psychological Need Satisfaction and Frustration Scale (BPNSFS) is a self-report instrument assessing the satisfaction and frustration of the three basic psychological needs of autonomy, competence, and relatedness defined by self-determination theory. The aim of this study was to examine the dimensionality, the predictive validity, and the measurement invariance across different age groups of the Italian version of the BPNSFS. The participants were 2,204 Italian adolescents and young adults (41% males) from 14 to 28 years old (M age = 20.23, SD = 4.25). The invariance across age demonstrated adequate equivalence of the 6-factor model of scales across adolescents (14–18 years) and …
Development of a questionnaire measuring treatment concerns in regular dental patients
2008
– Objectives: The aim of this study was to develop an instrument measuring core concerns about dental treatment guided by Reiss’ expectancy theory of fear. This would include the content domains of injury, somatic reaction and interpersonal concerns, to study the underlying factorial structure, and to determine the test quality of the resulting subscales. Methods: A total of 555 regular dental patients answered the item pool. Subsamples filled in the Dental Anxiety Scale (DAS) (n = 346) and the Anxiety-Present Scale of the state-form of the State-Trait Anxiety Inventory (STAI-S) (n = 187). A second sample (n = 89) was used to determine test-retest reliability and bias for social desirabi…
The emergence and adaptive use of prestige in an online social learning task
2020
AbstractPrestige-biased social learning occurs when individuals preferentially learn from others who are highly respected, admired, copied, or attended to in their group. This form of social learning is argued to reflect novel forms of social hierarchy in human societies, and, by providing an efficient short-cut to acquiring adaptive information, underpin the cumulative cultural evolution that has contributed to our species’ ecological success. Despite these potentially important consequences, little empirical work to date has tested the basic predictions of prestige-biased social learning. Here we provide evidence supporting the key predictions that prestige-biased social learning is used …
Defining response and remission in psychotherapy research: A comparison of the RCI and the method of percent improvement
2011
There is no consensus as to how to define response and remission for mental disorder treatments. The Reliable Change Index (RCI) is most commonly used in psychotherapy research, whereas psychopharmacologists prefer to calculate percentage of improvement (PI). We compared both methods using the Beck Depression Inventory in 395 depressive outpatients. The overall pre-post effect size was d=1.18. The PI-50 (≥ 50% improvement from baseline) resulted in outcome estimates higher than the RCI: 66.3% vs. 59.2% for response and 50.6% vs. 45.8% for remission. We demonstrate that the PI approach is independent of arbitrarily chosen reliabilities and reference populations. Furthermore, it takes differe…
Symptom dimensions in obsessive-compulsive disorder: from normal cognitive intrusions to clinical obsessions.
2011
Abstract Cognitive behavioral models of obsessive–compulsive disorder (OCD) assume continuity between normal obsessional intrusive thoughts (OITs) and obsessions. However, this assumption has recently been criticized. This article examines this issue using a new instrument (the Obsessional Intrusive Thoughts Inventory, INPIOS) specifically designed to assess the frequency and content of 48 OITs, which was completed by 734 community subjects and 55 OCD patients. Confirmatory factor analysis suggests six first-order factors included in two second-order factors, one containing aggressive, sexual, religious, immoral and repugnant OITs, and the other containing contamination, doubts and checking…
Factor analysis and reliability of the Movement Imagery Questionnaire.
1994
The purpose of this work was to analyze the factor structure, estimate reliability of the Movement Imagery Questionnaire of Hall and Pongrac, and examine differences between men and women on factor scores. The results for 63 men and 47 women supported the bifactorial structure and reliability of this self-report and its adequacy in comparisons of visual and kinesthetic imagery scores.