Discriminative Ability of Heel Quantitative Ultrasound in Postmenopausal Women with Prevalent Vertebral Fractures: Application of Optimal Threshold Cutoff Values Using Classification and Regression Tree Models

2012 ◽  
Vol 91 (2) ◽  
pp. 114-120 ◽  
Author(s):  
María del Carmen Navarro ◽  
Pedro Saavedra ◽  
María Jesús Gómez-de-Tejada ◽  
Mercedes Suárez ◽  
Diego Hernández ◽  
...  
Keyword(s):  
Postmenopausal Women ◽  
Quantitative Ultrasound ◽  
Vertebral Fractures ◽  
Regression Tree ◽  
Classification And Regression Tree ◽  
Optimal Threshold ◽  
Discriminative Ability ◽  
Cutoff Values ◽  
Tree Models ◽  
Classification And Regression

Discriminative Ability of Heel Quantitative Ultrasound in Postmenopausal Women With Prevalent Low-Trauma Fractures: Application of Optimal Threshold Cutoff Values Using CART Models

2011 ◽  
Vol 14 (4) ◽  
pp. 492-498 ◽  
Author(s):  
María del Carmen Navarro ◽  
Pedro Saavedra ◽  
María Jesús Gómez-de-Tejada ◽  
Mercedes Suárez ◽  
Diego Hernández ◽  
...  
Keyword(s):  
Postmenopausal Women ◽  
Quantitative Ultrasound ◽  
Optimal Threshold ◽  
Discriminative Ability ◽  
Cutoff Values

P4-044: IDENTIFICATION OF PHENOTYPIC CLUSTERS OF AD PATIENTS AND CONTROLS USING CLASSIFICATION AND REGRESSION TREE MODELS

2014 ◽  
Vol 10 ◽  
pp. P798-P799
Author(s):  
Charlotte Teunissen ◽  
Niki S.M. Schoonenboom ◽  
Pieter Jelle Visser ◽  
Wiesje M. Van der Flier ◽  
Dirk Knol ◽  
...  
Keyword(s):  
Regression Tree ◽  
Classification And Regression Tree ◽  
Tree Models ◽  
Classification And Regression

scholarly journals Intraoperative lactic acid concentration during liver transplantation and cutoff values to predict early mortality: a retrospective analysis of 3,338 cases

2021 ◽  
Author(s):  
Kyoung-Sun Kim ◽  
Sang-Ho Lee ◽  
Bo-Hyun Sang ◽  
Gyu-Sam Hwang
Keyword(s):  
Liver Transplantation ◽  
Lactic Acid ◽  
Regression Tree ◽  
Mortality Rates ◽  
Early Mortality ◽  
Classification And Regression Tree ◽  
Lactic Acid Concentration ◽  
Optimal Cutoff ◽  
Cutoff Values ◽  
Classification And Regression

Background: We aimed to explore intraoperative lactic acid (LA) level distribution during liver transplantation (LT) and determine the optimal cutoff values to predict post-LT 30-day and 90-day mortality.Methods: Intraoperative LA data from 3,338 patients were collected between 2008 to 2019 and all-cause mortalities within 30 and 90 days were retrospectively reviewed. Of the three LA levels measured during preanhepatic, anhepatic, and neohepatic phase of LT, the peak LA level was selected to explore the distribution and predict early post-LT mortality. To determine the best cutoff values of LA, we used a classification and regression tree algorithm and maximally selected rank statistics with the smallest P value.Results: The median intraoperative LA level was 4.4 mmol/L (range: 0.5–34.7, interquartile range: 3.0–6.2 mmol/L). Of the 3,338 patients, 1,884 (56.4%) had LA levels > 4.0 mmol/L and 188 (5.6%) had LA levels > 10 mmol/L. Patients with LA levels > 16.7 mmol/L and 13.5–16.7 mmol/L showed significantly higher 30-day mortality rates of 58.3% and 21.2%, respectively. For the prediction of the 90-day mortality, 8.4 mmol/L of intraoperative LA was the best cutoff value.Conclusions: Approximately 6% of the LT recipients showed intraoperative hyperlactatemia of > 10 mmol/L during LT, and those with LA > 8.4 mmol/L were associated with significantly higher early post-LT mortality.

scholarly journals Risk Profiles for Weight Gain among Postmenopausal Women: A Classification and Regression Tree Analysis Approach

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0121430 ◽  
Author(s):  
Su Yon Jung ◽  
Mara Z. Vitolins ◽  
Jenifer Fenton ◽  
Alexis C. Frazier-Wood ◽  
Stephen D. Hursting ◽  
...  
Keyword(s):  
Weight Gain ◽  
Postmenopausal Women ◽  
Regression Tree ◽  
Classification And Regression Tree ◽  
Analysis Approach ◽  
Risk Profiles ◽  
Tree Analysis ◽  
Regression Tree Analysis ◽  
Classification And Regression
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