Search results for "Nomogram"
showing 10 items of 45 documents
The respiratory gas values of the fetal and maternal blood in cartesian nomograms
1966
Respiratory gas values of maternal and fetal blood taken at delivery are represented in two Cartesian nomograms. They are based on data, published by vogel, fischer und thews (1965) and Fischer, Vogel und Thews (1965). The nomograms depict the interdependence of O2 pressure, O2 content, CO2 pressure and CO2 content, established by the O2 and CO2 dissociation curves, as well as by the Bohr effect and the Haldane effect. If two of the values are known, the remaining ones can be read from the nomograms.
Mapping the relation between University access test and student’s university performance
2018
The access test is the most used tool to evaluate the initial preparation of an italian student before enrolling at the university. Although the necessity to select the most deserving students seem unquestionably reasonable, we have to wonder if it appears to be a good predictor of university performance. In order to answer this question, the university careers of the students enrolled at two Degree Courses at the University of Palermo (academic year 2013/2014) were analysed. The very aim of this paper is to propose a graphical tool, the Student Efficiency Nomogram, that shows the access test scores together with the first-year performance of the student.
Development of a nomogram to estimate the quality of life in asthmatic children using the Childhood Asthma Control Test
2016
Background: Pediatric Asthma Quality of Life Questionnaire (PAQLQ) provides detailed information on QoL in asthmatic children, whereas Childhood Asthma Control Test (C-ACT) Questionnaire is the most validated instrument for asthma control. No study assessed the relationship between C-ACT and QoL in children by means of those instruments. The aim of this study was to determine whether a QoL estimation is possible using the C-ACT questionnaire in asthmatic children. Methods: Medical history, spirometry, C-ACT, and PAQLQ were assessed in 144 (60% male) outpatient asthmatic children from September 2011 to November 2014. A generalized linear model (GLM) for the prediction of PAQLQ was obtained t…
A model-based approach for assessing bronchodilator responsiveness in children: The conventional cutoff revisited
2020
An increase in FEV1 >=12% has been proposed in international guidelines as a clue to airway reversibility for diagnosing asthma in both adults and children. However, the validity of this cut-off has been questioned in the pediatric population. The aim of this study was to provide evidence that different cut-off values in BDR may be associated with better performance in discriminating among outpatient children with naïve asthma (A) and without asthma (NA). We compared three approaches: i) the conventional cutoff (12%); ii) the cut-off estimated by Youden's criteria; and iii) the cut-off based on a model-driven approach. we found that the conventional cut-off of 12% showed poor sensitivity in…
L'efficienza delle strutture ospedaliere siciliane
2003
This paper refers to the evaluation of the technical efficiency of Sicilian hospitals, based on official data provided by the Italian Ministry of Health. We used both descriptive (in particular: the Barber’s nomogram) and explanatory methods (DEA models) in order to highlight some remarkable features and implications of them and to compare the different results produced. Some results contradict the stereotypes on the supposed inefficiency of public hospitals as opposite to the efficiency of private ones.
Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
2021
AIM: To evaluate the short-term clinical outcomes of Ferrara rings in keratoconus using an optimized nomogram developed after several years of research and retrospective analysis of clinical data. METHODS: This prospective longitudinal non-comparative clinical trial evaluated 88 eyes of 88 patients (age 18-62y) with keratoconus diagnosis from two Spanish centers. Ferrara ring segment (AJL Ophthalmic) implantation was performed in all cases, using the mechanical procedure in 25 eyes (28.4%) and a femtosecond laser-assisted procedure in 63 eyes (71.6%). The ring segments implanted in each case were selected using a new optimized nomogram that considered variables such as anterior corneal asph…
Prediction of significant renal function decline after open, laparoscopic, and robotic partial nephrectomy: External validation of the Martini’s nomo…
2022
Objectives: Martini et al. developed a nomogram to predict significant (>25%) renal function loss after robot-assisted partial nephrectomy and identified four risk categories. We aimed to externally validate Martini’s nomogram on a large, national, multi-institutional data set including open, laparoscopic, and robot-assisted partial nephrectomy. Methods: Data of 2584 patients treated with partial nephrectomy for renal masses at 26 urological Italian centers (RECORD2 project) were collected. Renal function was assessed at baseline, on third postoperative day, and then at 6, 12, 24, and 48 months postoperatively. Multivariable models accounting for variables included in the Martini’s nomog…
Computerized analysis of normal fetal heart rate pattern throughout gestation.
2009
Objective To analyze the evolution of computerized cardiotocography (cCTG) parameters throughout gestation in a large archive of traces from healthy fetuses. Methods This was a cross-sectional study of the first cCTG record from 4412 singleton fetuses with good pregnancy outcome. Normal ranges of cCTG parameters for 25 to 42 weeks were derived from analysis of only one cCTG record per fetus, and the relationship between the parameters and gestational age was investigated. Results Fetal heart rate (FHR) accelerations, short- and long-term variation overall, duration of episodes of high and low variation and variation in high episodes increased with advancing gestation. In contrast, maternal …
Can stress biomarkers predict preterm birth in women with threatened preterm labor?
2017
Background: Preterm birth is a major paediatric challenge difficult to prevent and with major adverse outcomes. Prenatal stress plays an important role on preterm birth; however, there are few stress-related models to predict preterm birth in women with Threatened Preterm Labor (TPL). Objective: The aim of this work is to study the influence of stress biomarkers on time until birth in TPL women. Methods: Eligible participants were pregnant women between 24 and 31 gestational weeks admitted to the hospital with TPL diagnosis (n = 166). Stress-related biomarkers (a-amylase and cortisol) were determined in saliva samples after TPL diagnosis. Participants were followed-up until labor. A paramet…
F75Determining fetal lung volume using three-dimensional-ultrasonography
2000
Background The aim of the study was to establish fetal lung, thoracic and heart volume nomograms using 3D-ultrasonography. Method For this purpose 115 fetuses were examined (between 18 and 33 weeks of gestation) using Voluson 530D (Kretztechnik, Austria) ultrasound device and 5 MHZ three-dimensional annular volume transducer. Lung volumes of 15 fetuses suffering from skeletal dysplasia, renal agenesis or hydrothorax and secondary pulmonary hypoplasia were compared with previously established nomograms. Results Lung volumes in the pathologic group of fetuses compared to the nomograms were below the 5% for gestational age. Conclusion The encouraging first results suggest that this method coul…