Using a restricted cubic spline in a regression analysis will use k - 1 degrees of freedom (the linear variable x and k – 2 piecewise cubic variables) in addition to the intercept. SPECIFYING A RESTRICTED CUBIC SPLINE Specification of a spline uses notation which may be unfamiliar: Let u+...
The results of multivariable restricted cubic spline regression analysis showed that there was a non-linear relationship between the continuous change of BMI and hypertension (P<0.001) after adjusting the confounding factors of different genders and age groups, which indicated that there was an ...
限制性立方样条在非线性回归中的应用研究 The Application of Restricted Cubic Spline in Nonlinear Regression 下载积分: 1500 内容提示: 限制性立方样条在非线性回归中的应用研究事罗剑锋1,2金欢1· 2李宝月1· 2赵耐青1· 2△· 229·【提要】目的探讨限制性立方样条在自变量和应变量非线性相关时的应用。方法...
Restricted cubic splines are just a transformation of an independent variable.Thus, they can be used not only in ordinary least squares regression, but also in logistic regression,survival analysis, and so on. The range of values of the independent variable is split up, with "knots"defining ...
Feature selection process for variables included in the prediction model. (A) Variable importance based on the Boruta algorithm, where attributes are classified as “Tentative” (green), “Confirmed” (blue), “Rejected” (red), and “NA” (grey). (B) LASSO regression path showing the coeffic...
A spline is a drafting tool for drawing curves. In statistics, splines are a broad class of methods for transforming variables. I first introduce the concept via linear splines and work my way to…
spline.ado Dupont WD, Plummer WD: rc_spline from SSC-IDEAS http://fmwww.bc.edu/RePEc/bocode/r General Reference Harrell FE: Regression Modeling Strategies: With Applications to Linear Models, Logistic Regression, and Survival Analysis. New York: Springer, 2001. 16 Cubic B-Splines de Boor, ...
Restricted cubic spline models Figure 1 shows the multivariable adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for the Cox regression models with RCSs for all-cause death and MACE for each drug group. The corresponding HRs and 95% CIs for various PDC values are shown in Sup...
%linear models, logistic regression and survival analysis), 2001, %Springer Series in Statistics, pages 20-21. % %INPUT ARGUMENTS: %x: A vector containing the covariate values x. %y: A vector of length(x) that contains the response values y. ...
Restricted cubic spline (RCS) and Cox proportional hazards regression models were used to estimate the hazard ratio (HR) and 95% confidence interval (CI) of association between waist circumference and the risk of PLC in males. Results: During a median of 8.9 years of follow-up, 346 PLC ...