A Comparison of Four Serum Markers of Fibrosis in the Diagnosis of Cirrhosis

1997 ◽  
Vol 34 (2) ◽  
pp. 151-155 ◽  
Author(s):  
Carlo Fabris ◽  
Edmondo Falleti ◽  
Edda Federico ◽  
Pierluigi Toniutto ◽  
Mario Pirisi
Keyword(s):  
Alcohol Intake ◽  
Operating Characteristic ◽  
Roc Curves ◽  
Serum Markers ◽  
Collagen Iv ◽  
Prolyl Hydroxylase ◽  
Stepwise Logistic Regression ◽  
Stepwise Logistic Regression Analysis ◽  
Mean Values ◽  
Procollagen Iii

C-terminal peptide of procollagen I, N-terminal peptide of procollagen III, collagen IV and serum prolyl hydroxylase were measured in 100 patients with cirrhosis and 71 patients with noncirrhotic chronic liver disease. Patients with cirrhosis had significantly higher mean values of prolyl hydroxylase, collagen IV, N-terminal peptide of procollagen III and C-terminal peptide of procollagen I as compared to noncirrhotic patients. This difference was maintained for collagen products even after stratification for alcohol intake, although all markers of fibrosis were higher in alcoholics. Stepwise logistic regression analysis showed that collagen IV, and N-terminal peptide of procollagen III were independently associated with cirrhosis. Receiver-operating characteristic (ROC) curves showed that collagen IV and N-terminal peptide of procollagen III perform more efficiently than C-terminal peptide of procollagen I and prolyl hydroxylase in identifying cirrhosis.

scholarly journals A rapid screening model for early predicting novel coronavirus pneumonia in Zhejiang Province of China: a multicenter study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yi-Ning Dai ◽  
Wei Zheng ◽  
Qing-Qing Wu ◽  
Tian-Chen Hui ◽  
Nan-Nan Sun ◽  
...  
Keyword(s):  
Operating Characteristic ◽  
Clinical Manifestations ◽  
Cost Effective ◽  
Rapid Screening ◽  
Stepwise Logistic Regression ◽  
Stepwise Logistic Regression Analysis ◽  
Screening Model ◽  
Epidemiological Features ◽  
Geographical Regions ◽  
Novel Coronavirus

AbstractNovel coronavirus pneumonia (NCP) has been widely spread in China and several other countries. Early finding of this pneumonia from huge numbers of suspects gives clinicians a big challenge. The aim of the study was to develop a rapid screening model for early predicting NCP in a Zhejiang population, as well as its utility in other areas. A total of 880 participants who were initially suspected of NCP from January 17 to February 19 were included. Potential predictors were selected via stepwise logistic regression analysis. The model was established based on epidemiological features, clinical manifestations, white blood cell count, and pulmonary imaging changes, with the area under receiver operating characteristic (AUROC) curve of 0.920. At a cut-off value of 1.0, the model could determine NCP with a sensitivity of 85% and a specificity of 82.3%. We further developed a simplified model by combining the geographical regions and rounding the coefficients, with the AUROC of 0.909, as well as a model without epidemiological factors with the AUROC of 0.859. The study demonstrated that the screening model was a helpful and cost-effective tool for early predicting NCP and had great clinical significance given the high activity of NCP.

Development and initial validation of a screening questionnaire for psoriatic arthritis: the Toronto Psoriatic Arthritis Screen (ToPAS)

2008 ◽  
Vol 68 (4) ◽  
pp. 497-501 ◽  
Author(s):  
D D Gladman ◽  
C T Schentag ◽  
B D M Tom ◽  
V Chandran ◽  
J Brockbank ◽  
...  
Keyword(s):  
Psoriatic Arthritis ◽  
Family Medicine ◽  
Sensitivity And Specificity ◽  
Logistic Model ◽  
Operating Characteristic ◽  
Roc Curves ◽  
Stepwise Logistic Regression ◽  
Screening Questionnaire ◽  
Analysis Strategy ◽  
Patient Groups

Objective:To develop and validate a psoriatic arthritis (PsA) screening questionnaire: the Toronto Psoriatic Arthritis Screen (ToPAS).Methods:The ToPAS was developed through review of items seen in patients with PsA and evaluation by patients with PsA and patients with other rheumatological conditions, and was administered to consecutive consenting patients attending five clinics: PsA, psoriasis, general dermatology, general rheumatology (excluding PsA patients) and family medicine. All patients were assessed by a rheumatologist according to a standard protocol. A three-step analysis strategy was adopted: a stepwise logistic regression to identify the questions most important in discriminating between those with and without PsA; a logistic model was fitted to three clinically relevant domains for PsA: skin, joints and nails; and a simpler weighting of each of the domains used in step 2. Receiver operating characteristic (ROC) curves were obtained based on these various models.Results:In all, there were 134 patients from the PsA clinic, 123 with psoriasis, 118 from dermatology, 135 from rheumatology and 178 from family medicine. A simplified discriminatory score based on the skin, joint and nail domains gave results comparable to other methods with an observed overall sensitivity and specificity, based on a single cut point, of 86.8% and 93.1%. When the patients with PsA were compared with each of the other four patient groups individually, the sensitivity and specificity of the ToPAS were: psoriasis 89.1%, 86.3%; dermatology 91.9%, 95.2%; rheumatology 92.6%, 85.7%; and family medicine 90.4%, 100%.Conclusion:Our simplified index is very good at classifying those who are not diagnosed with PsA and those who are diagnosed with PsA.

Use of Receiver Operating Characteristic (ROC) Curves to Evaluate Computer Confidence Threshold and Clinical Performance in the Diagnosis of Appendicitis

1978 ◽  
Vol 17 (03) ◽  
pp. 157-161 ◽  
Author(s):  
F. T. De Dombal ◽  
Jane C. Horrocks
Keyword(s):  
Receiver Operating Characteristic ◽  
Operating Characteristic ◽  
Clinical Performance ◽  
Roc Curves ◽  
Final Diagnosis ◽  
Confidence Threshold ◽  
Computer Aided ◽  
Computer Confidence ◽  
Overall Performance ◽  
Receiver Operating

This paper uses simple receiver operating characteristic (ROC) curves (i) to study the effect of varying computer confidence of threshold levels and (ii) to evaluate clinical performance in the diagnosis of acute appendicitis. Over 1300 patients presenting to five centres with abdominal pain of short duration were studied in varying detail. Clinical and computer-aided diagnostic predictions were compared with the »final« diagnosis. From these studies it is concluded the simplistic setting of a 50/50 confidence threshold for the computer program is as »good« as any other. The proximity of a computer-aided system changed clinical behaviour patterns; a higher overall performance level was achieved and clinicians performance levels became associated with the »mildly conservative« end of the computers ROC curve. Prior forecasts of over-confidence or ultra-caution amongst clinicians using the computer-aided system have not been fulfilled.

The Use of Total Contact Orthoses in Patients with Foot Problems in Foot Clinic, Siriraj Hospital

2020 ◽  
Vol 103 (12) ◽  
pp. 1292-1299
Keyword(s):  
Odds Ratio ◽  
Univariate Analysis ◽  
Stepwise Logistic Regression ◽  
Posterior Tibial Tendon ◽  
Posterior Tibial Tendon Dysfunction ◽  
Stepwise Logistic Regression Analysis ◽  
Cross Sectional ◽  
Siriraj Hospital ◽  
Foot Problems ◽  
Foot Clinic

Objective: To study the use rate, outcome, and concomitant factors of the use of the total contact orthoses (TCO) in the Foot Clinic, Siriraj Hospital Materials and Methods: The present study was a cross-sectional descriptive study collecting data from patient medical records and questionnaires. Patients who had foot problems without impairment of foot sensation and received the TCO from the Foot Clinic between July 2015 and April 2016 were interviewed before and after using the latest TCO for one month. Results: One hundred seven participants were recruited. Most were female (84.1%) with a median age of 59.3 years. The majority had chronic plantar fasciitis (26.2%), posterior tibial tendon dysfunction (PTTD) (25.2%), hallux valgus (21.5%), or metatarsalgia (21.5%). The TCO user was defined as a participant who had to use the TCO for more than three days per week and for more or equal to 50% of daily walking and standing duration. The use rate was 67.3%. The TCO provides standing and walking stability (p=0.008). For patients with metatarsalgia, using the TCO could significantly reduce pain (p=0.002). Using univariate analysis, many factors were found to be associated with the use of the TCO including having level of convenience of putting on or taking off shoes with TCO at 9 or more (odds ratio 2.66, 95% CI 1.16 to 6.12), having difficulty to find proper shoes that fit with the TCO (odds ratio 0.36, 95% CI 0.15 to 0.89), receiving more than one pair of TCO (odds ratio 4.09, 95% CI 1.51 to 11.05), and having level of comfort satisfaction during the TCO use at 9 or more (odds ratio 3.61, 95% CI 1.55 to 8.40). The latter two factors were found to be associated with the use of the TCO from stepwise logistic regression analysis (adjusted odds ratio 3.39, 95% CI 1.18 to 9.71 and 3.02, 95% CI 1.07 to 8.47, respectively). Conclusion: The use of the TCO in the Foot Clinic, Siriraj Hospital was 67.3%. Using the TCO could promote walking stability. Factors affecting the use of the TCO included receiving more than the first pair of TCO and having comfort satisfaction level of 9 or more. Keywords: Use, Total contact orthoses, Total contact insole, Foot problems

scholarly journals MicroRNAs-1299, -126-3p and -30e-3p as Potential Diagnostic Biomarkers for Prediabetes

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 949
Author(s):  
Cecil J. Weale ◽  
Don M. Matshazi ◽  
Saarah F. G. Davids ◽  
Shanel Raghubeer ◽  
Rajiv T. Erasmus ◽  
...  
Keyword(s):  
Receiver Operating Characteristic ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Predictive Ability ◽  
Roc Curves ◽  
Tolerance Test ◽  
Cross Sectional Study ◽  
Oral Glucose ◽  
Cross Sectional ◽  
Receiver Operating

This cross-sectional study investigated the association of miR-1299, -126-3p and -30e-3p with and their diagnostic capability for dysglycaemia in 1273 (men, n = 345) South Africans, aged >20 years. Glycaemic status was assessed by oral glucose tolerance test (OGTT). Whole blood microRNA (miRNA) expressions were assessed using TaqMan-based reverse transcription quantitative-PCR (RT-qPCR). Receiver operating characteristic (ROC) curves assessed the ability of each miRNA to discriminate dysglycaemia, while multivariable logistic regression analyses linked expression with dysglycaemia. In all, 207 (16.2%) and 94 (7.4%) participants had prediabetes and type 2 diabetes mellitus (T2DM), respectively. All three miRNAs were significantly highly expressed in individuals with prediabetes compared to normotolerant patients, p < 0.001. miR-30e-3p and miR-126-3p were also significantly more expressed in T2DM versus normotolerant patients, p < 0.001. In multivariable logistic regressions, the three miRNAs were consistently and continuously associated with prediabetes, while only miR-126-3p was associated with T2DM. The ROC analysis indicated all three miRNAs had a significant overall predictive ability to diagnose prediabetes, diabetes and the combination of both (dysglycaemia), with the area under the receiver operating characteristic curve (AUC) being significantly higher for miR-126-3p in prediabetes. For prediabetes diagnosis, miR-126-3p (AUC = 0.760) outperformed HbA1c (AUC = 0.695), p = 0.042. These results suggest that miR-1299, -126-3p and -30e-3p are associated with prediabetes, and measuring miR-126-3p could potentially contribute to diabetes risk screening strategies.

Patterns of care in Italian psychiatric services and psychosocial outcome of schizophrenic patients. A three-year prospective study

1989 ◽  
Vol 4 (1) ◽  
pp. 23-31 ◽  
Author(s):  
D. Kemali ◽  
M. Maj ◽  
B. Carpiniello ◽  
R.D. Giurazza ◽  
M. Impagnatiello ◽  
...  
Keyword(s):  
Psychosocial Adjustment ◽  
Ad Hoc ◽  
Social Withdrawal ◽  
Skills Training ◽  
Favourable Outcome ◽  
Stepwise Logistic Regression ◽  
Psychosocial Outcome ◽  
Stepwise Logistic Regression Analysis ◽  
Schizophrenic Patients ◽  
The Difference

Summary141 patients with an ICD-9 diagnosis of schizophrenic psychosis were followed up prospectively for 3 years in 7 Italian centres, representative of the different degrees of application of the psychiatric reform law (Law 180) passed in 1978. It was agreed that each centre would treat the patients according to its routine, and that all contacts with the patients and each intervention performed would be carefully recorded in an ad hoc schedule. The baseline evaluation of psychosocial adjustment was performed by the Disability Assessment Schedule (DAS), and this assessment was then repeated every 6 months during the follow-up period. At the end of this period, the rating on the DAS section 5 was taken as a global measure of patients’ psychosocial outcome. On a stepwise logistic regression analysis, 2 variables were found to be significantly predictive of psychosocial outcome, that is the use of social and/or vocational skills training (associated with a favourable outcome) and the number of days/year of full hospitalization (associated with a poor outcome). Trieste and Arezzo were the only centres in which a significant improvement of the score on some DAS subscales (namely, “occupational role, interest” and “social withdrawal”) was detected. In the whole patient sample, the difference between the final and the baseline score on these subscales correlated significantly with the number/year of outpatient contacts and of home visits. These findings confirm the favourable impact of the community-oriented care provided in some Italian centres on the Psychosocial outcome of schizophrenic patients.

scholarly journals Sonographic Cervical Shortening after Labor Induction is a Predictor of Vaginal Delivery

2016 ◽  
Vol 38 (12) ◽  
pp. 585-588 ◽  
Author(s):  
Ugo Indraccolo ◽  
Gennaro Scutiero ◽  
Pantaleo Greco
Keyword(s):  
Logistic Regression ◽  
Vaginal Delivery ◽  
Regression Models ◽  
Operating Characteristic ◽  
Roc Curves ◽  
Cervical Length ◽  
Labor Induction ◽  
Logistic Regression Models ◽  
Independent Variables ◽  
Sonographic Evaluation

Objective Analyzing if the sonographic evaluation of the cervix (cervical shortening) is a prognostic marker for vaginal delivery. Methods Women who underwent labor induction by using dinoprostone were enrolled. Before the induction and three hours after it, the cervical length was measured by ultrasonography to obtain the cervical shortening. The cervical shortening was introduced in logistic regression models among independent variables and for calculating receiver operating characteristic (ROC) curves. Results Each centimeter in the cervical shortening increases the odds of vaginal delivery in 24.4% within 6 hours; in 16.1% within 24 hours; and in 10.5% within 48 hours. The best predictions for vaginal delivery are achieved for births within 6 and 24 hours, while the cervical shortening poorly predicts vaginal delivery within 48 hours. Conclusion The greater the cervical shortening 3 hours after labor induction, the higher the likelihood of vaginal delivery within 6, 24 and 48 hours.

Receiver operating characteristic (ROC) analysis of neurons in the cat's lateral geniculate nucleus during tonic and burst response mode

1995 ◽  
Vol 12 (4) ◽  
pp. 723-741 ◽  
Author(s):  
W. Guido ◽  
S.-M. Lu ◽  
J.W. Vaughan ◽  
Dwayne W. Godwin ◽  
S. Murray Sherman
Keyword(s):  
Visual Stimulus ◽  
Action Potentials ◽  
Operating Characteristic ◽  
Visual Stimuli ◽  
Roc Curves ◽  
Response Mode ◽  
Burst Mode ◽  
Low Threshold Spike ◽  
Low Threshold ◽  
Roc Area

AbstractRelay cells of the lateral geniculate nucleus respond to visual stimuli in one of two modes: burst and tonic. The burst mode depends on the activation of a voltage-dependent, Ca2+ conductance underlying the low threshold spike. This conductance is inactivated at depolarized membrane potentials, but when activated from hyperpolarized levels, it leads to a large, triangular, nearly all-or-none depolarization. Typically, riding its crest is a high-frequency barrage of action potentials. Low threshold spikes thus provide a nonlinear amplification allowing hyperpolarized relay neurons to respond to depolarizing inputs, including retinal EPSPs. In contrast, the tonic mode is characterized by a steady stream of unitary action potentials that more linearly reflects the visual stimulus. In this study, we tested possible differences in detection between response modes of 103 geniculate neurons by constructing receiver operating characteristic (ROC) curves for responses to visual stimuli (drifting sine-wave gratings and flashing spots). Detectability was determined from the ROC curves by computing the area under each curve, known as the ROC area. Most cells switched between modes during recording, evidently due to small shifts in membrane potential that affected the activation state of the low threshold spike. We found that the more often a cell responded in burst mode, the larger its ROC area. This was true for responses to optimal and nonoptimal visual stimuli, the latter including nonoptimal spatial frequencies and low stimulus contrasts. The larger ROC areas associated with burst mode were due to a reduced spontaneous activity and roughly equivalent level of visually evoked response when compared to tonic mode. We performed a within-cell analysis on a subset of 22 cells that switched modes during recording. Every cell, whether tested with a low contrast or high contrast visual stimulus exhibited a larger ROC area during its burst response mode than during its tonic mode. We conclude that burst responses better support signal detection than do tonic responses. Thus, burst responses, while less linear and perhaps less useful in providing a detailed analysis of visual stimuli, improve target detection. The tonic mode, with its more linear response, seems better suited for signal analysis rather than signal detection.

Early predictors of two month response with mianserin and selective serotonin reuptake inhibitors and influence of definition of outcome on prediction

1998 ◽  
Vol 13 (3) ◽  
pp. 138-142 ◽  
Author(s):  
I Berlin ◽  
F Lavergne
Keyword(s):  
Complete Remission ◽  
Selective Serotonin Reuptake Inhibitors ◽  
Stepwise Logistic Regression ◽  
Stepwise Logistic Regression Analysis ◽  
Double Blind ◽  
Significant Treatment ◽  
Early Improvement ◽  
Time Interaction ◽  
Early Predictors ◽  
Definition Of

SummaryIn order to identify clinical and demographic variables that predict response to antidepressants and to analyse prediction of outcome as a function of definition of outcome we analysed pooled data of two independent, multicentre, double blind parallel group studies. Study I compared the efficacy of mianserin with that of fluoxetine in 65, and study II compared mianserin with fluvoxamine in 60 patients with depression. Improvement was defined as at least 20% decrease in MADRS by day 14. Patients were considered as responders if they had greater than 50% decrease and non-responders if they had ≤ 50% decrease from baseline in the MADRS at day 56. Complete remission was defined as MADRS score ≤ 6 at day 56. Patients' characteristics did not differ between mianserin and SSRI groups. Early improvement predicted response in 92% and complete remission in 55% of the patients improved at day 14. Multivariate forward stepwise logistic regression analysis showed that response to treatments at day 56 was significantly (P = 0.0003) associated with early improvement, age (responders had higher age than non-responders) and weight (responders weighted more than non-responders). Complete remission was only predicted by early improvement. Treatments could not be differentiated when data were analysed according to responder/nonresponder status or complete remission/no complete remission. However, when the same data were analysed by analysis of variance a significant treatment effect (P = 0.02, mianserin > SSRIs) and a quadratic type treatment by time interaction (P = 0.023) were found. The robustness of the analysis was further improved by inclusion of covariates (age, weight). Early clinical improvement seems to be the best predictor of 2 month response to antidepressants (mianserin, SSRIs). Younger age and lower weight may predict non-response. Quantitative analysis differentiates treatments better than analysis of responder status. As obtenation of complete remission is a realistic objective with current antidepressants, studies longer than 2 months are needed to assess effectiveness of these drugs in the obtenation of complete remission.

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