Restricted cubic spline(RCS):限制性立方样条 spline 当我们的自变量和因变量之间不是简单的线性关系,我们还可以通过多项式回归,多元线性回归等方法构造非线性的关系模型,限制性立方样条(RCS)也是一种选择。 什么是Restricted cubic spline 实在是不了解这个东西到底是怎么翻译成的,因为仅仅从他的中文译名来看限制性立方...
Stata Software Goldstein, R: srd15, Restricted cubic spline functions. 1992; STB-10: 29-32. spline.ado Sasieni, P: snp7.1, Natural cubic splines. 1995; STB-24. spline.ado Dupont WD, Plummer WD: rc_spline from SSC-IDEAS http://fmwww.bc.edu/RePEc/bocode/r General Reference Harrell FE...
Analysis of Dose-response Relationship between BMI and Hypertension in Northeastern China Using Restricted Cubic Spline FunctionsHypertensionRisk factorsHigh body mass index (BMI) was significantly associated with hypertension. The purpose of this study is to investigate the association between BMI and ...
Age stratification is based on the relationship between age and cancer-specific mortality, as demonstrated by restricted cubic spline analyses (RCS). Cox proportional hazards regression analyses were employed to identify independent prognostic factors in the young CC group. Two novel nomograms for this...
Paper 5621-2016 Restricted Cubic Spline Regression: A Brief Introduction Ruth Croxford, Institute for Clinical Evaluative Sciences ABSTRACT Sometimes, the relationship between an outcome (dependent) variable and the explanatory (independent) variable(s) is not linear. Restricted cubic splines are a way ...
Examples show that the inclusion of time-dependent covariables defined as step functions into the restricted cubic spline proportional hazards model reduces computation time by a factor of 213 over the Cox model. Advantages of the spline model also include flexibility of the hazard, smooth survival ...
censored survival data and using regression cubic splines with or without constraints of linearity on both tails, was adopted by other authors [=-=Herndon and Harrell, 1990-=-; Rosenberg, 1995] that considered the estimation of not only monotonic but also unimodal and bathtub hazard functions. ...
Algorithms for spline and other approximations to functions and data A succinct introduction to splines, explaining how and why B -splines are used as a basis and how cubic and quadratic splines may be constructed, is follow... GM Phillips,PJ Taylor - 《Computer Physics Communications》 被引量...
I've made a macro to estimate restricted cubic spline (RCS) basis in SPSS. Splines are useful tools to model non-linear relationships. Splines are useful exploratory tools to model non-linear relationships by transforming the independent variables in multiple regression equations. SeeDurrleman and ...
cars(where=(Origin in ('Asia' 'USA') & Type ^="Hybrid")); effect spl = spline(mpg_city / details naturalcubic basis=tpf(noint) knotmethod=percentiles(5) ); model Origin(event ='USA')= spl / selection=none; /* fit model by using spline effects */ output out=SplineOut ...