Graphical Comparison of Nonparametric Curves

1996 ◽  
Vol 45 (1) ◽  
pp. 83 ◽  
Author(s):  
Adrian Bowman ◽  
Stuart Young
Keyword(s):  
Graphical Comparison

scholarly journals Validation of the Framingham hypertension risk score in a middle eastern population: Tehran lipid and glucose study (TLGS)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Fatemeh Koohi ◽  
Ewout W. Steyerberg ◽  
Leila Cheraghi ◽  
Alireza Abdshah ◽  
Fereidoun Azizi ◽  
...  
Keyword(s):  
Simple Model ◽  
Risk Score ◽  
Screening Tool ◽  
Middle Eastern ◽  
Predictive Ability ◽  
Eastern Population ◽  
Hypertension Risk ◽  
Graphical Comparison ◽  
Middle Eastern Population

Abstract Background The Framingham hypertension risk score is a well-known and simple model for predicting hypertension in adults. In the current study, we aimed to assess the predictive ability of this model in a Middle Eastern population. Methods We studied 5423 participants, aged 20–69 years, without hypertension, who participated in two consecutive examination cycles of the Tehran Lipid and Glucose Study (TLGS). We assessed discrimination based on Harrell’s concordance statistic (c-index) and calibration (graphical comparison of predicted vs. observed). We evaluated the original, recalibrated (for intercept and slope), and revised (for beta coefficients) models. Results Over the 3-year follow-up period, 319 participants developed hypertension. The Framingham hypertension risk score performed well in discriminating between individuals who developed hypertension and those who did not (c-index = 0.81, 95% CI: 0.79–0.83). Initially, there was a systematic underestimation of the original risk score (events predicted), which was readily corrected by a simple model revision. Conclusions The revised Framingham hypertension risk score can be used as a screening tool in public health and clinical practice to facilitate the targeting of preventive interventions in high-risk Middle Eastern people.

A Graphical Comparison of Loblolly Pine Growth-and-Yield Models

2013 ◽  
Vol 37 (3) ◽  
pp. 169-176 ◽  
Author(s):  
James E. Henderson ◽  
Scott D. Roberts ◽  
Donald L. Grebner ◽  
Ian A. Munn
Keyword(s):  
Loblolly Pine ◽  
Growth And Yield ◽  
Graphical Comparison ◽  
Growth And Yield Models

Preliminary Site Index Equations for Three Planted Species in Northern Ontario

1995 ◽  
Vol 12 (2) ◽  
pp. 57-63 ◽  
Author(s):  
Bijan Payandeh ◽  
Yonghe Wang
Keyword(s):  
Nonlinear Analysis ◽  
Black Spruce ◽  
Analysis Data ◽  
Site Index ◽  
Analysis Of Covariance ◽  
Stem Analysis ◽  
Northern Ontario ◽  
Natural Stand ◽  
Graphical Comparison ◽  
Similarities And Differences

Abstract Stem analysis data from plantations of black spruce, white spruce, and jack pine from northern Ontario were fitted to base-age specific and base-age invariant site index models. The resulting equations and their respective parameters were compared via nonlinear analysis of covariance. The base-age specific models produced a somewhat better fit to the data than their base-age invariant counterparts, although the latter are considered theoretically more elegant. Graphical comparison of plantation and natural stand site index curves for the three species showed both similarities and differences. North. J. Appl. For. 12(2):57-63.

A graphical comparison of RISC processors

1992 ◽  
Vol 20 (4) ◽  
pp. 2-8 ◽  
Author(s):  
Margarita Esponda ◽  
Raúl Rojas
Keyword(s):  
Graphical Comparison

FICTON THEORY OF DYNAMICAL SYSTEMS WITH NOISY PARAMETERS

1965 ◽  
Vol 43 (4) ◽  
pp. 619-639 ◽  
Author(s):  
R. C. Bourret
Keyword(s):  
Magnetic Field ◽  
Exact Solution ◽  
Dynamical Systems ◽  
Approximate Solutions ◽  
Frequency Parameter ◽  
Time Dependent ◽  
Quantum Mechanical ◽  
Graphical Comparison ◽  
The One ◽  
Random Fluctuations

The theory of randomly perturbed waves described previously (Bourret 1962a, b) is presented in a form applicable to purely time-dependent systems, classical or quantum mechanical. It is then applied to the problem of a spin-[Formula: see text] dipole in a magnetic field with random fluctuations. One- and two-ficton processes are taken into account and a "renormalization" approximation is given also. Graphical comparison of the approximate solutions with the exact solution is presented. As a classical example, the harmonic oscillator with a noisy frequency parameter is analyzed in both the one- and two-ficton approximations.

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