Results 1 to 10 of about 11,828 (202)

Causal Isotonic Regression [PDF]

Journal of the Royal Statistical Society Series B: Statistical Methodology, 2020
SummaryIn observational studies, potential confounders may distort the causal relationship between an exposure and an outcome. However, under some conditions, a causal dose–response curve can be recovered by using the G-computation formula. Most classical methods for estimating such curves when the exposure is continuous rely on restrictive parametric ...
Westling, Ted, Gilbert, Peter, Carone, Marco   +2 more
openaire   +5 more sources

The bias of isotonic regression [PDF]

Electronic Journal of Statistics, 2020
We study the bias of the isotonic regression estimator. While there is extensive work characterizing the mean squared error of the isotonic regression estimator, relatively little is known about the bias. In this paper, we provide a sharp characterization, proving that the bias scales as $O(n^{-β/3})$ up to log factors, where $1 \leq β\leq 2$ is the ...
Dai, Ran, Song, Hyebin, Barber, Rina Foygel, Raskutti, Garvesh   +3 more
openaire   +5 more sources

Identifying change points in a covariate effect on time-to-event analysis with reduced isotonic regression. [PDF]

PLoS ONE, 2014
Isotonic regression is a useful tool to investigate the relationship between a quantitative covariate and a time-to-event outcome. The resulting non-parametric model is a monotonic step function of a covariate X and the steps can be viewed as change ...
Yong Ma, Yinglei Lai, John M Lachin
doaj   +2 more sources

Isotonic Regression under Lipschitz Constraint [PDF]

Journal of Optimization Theory and Applications, 2009
The pool adjacent violators (PAV) algorithm is an efficient technique for the class of isotonic regression problems with complete ordering. The algorithm yields a stepwise isotonic estimate which approximates the function and assigns maximum likelihood to the data.
Yeganova, L., Wilbur, W. J.
openaire   +3 more sources

Exercise with fasting or isotonic drink? A randomized controlled trial in youth elite basketball players [PDF]

Journal of the International Society of Sports Nutrition
Background Pre-exercise carbohydrate intake is known to influence performance; however, data describing their effect on cardiorespiratory parameters is scarce.
Petra Márton, Luca Kata Bátai, Titanilla Takács, Emese Csulak, Anna Réka Kiss, Bence Kopper, Liliána Erzsébet Szabó, Dorottya Balla, Iván Petrov, Lilla Lázár, Hajnalka Vágó, Béla Merkely, Nóra Sydó   +12 more
doaj   +2 more sources

A lightweight deep learning framework for reliable microscopy-based diagnosis of cutaneous leishmaniasis. [PDF]

PLoS ONE
Cutaneous leishmaniasis (CL) is a neglected tropical and zoonotic disease affecting both human and animal health, for which microscopic examination of Giemsa-stained slides remains the diagnostic reference standard despite being time-consuming and ...
Nisreen Osman E Ahmed, Samuel Mwalili, Murtada K Elbashir   +2 more
doaj   +2 more sources

A clinical prediction model for central venous catheter-associated bloodstream infections: derivation and validation from the MIMIC-IV cohort [PDF]

European Journal of Medical Research
Background Central venous catheter-associated bloodstream infections (CVC–BSIs) significantly affect clinical outcomes in critically ill patients. Existing risk prediction models lack comprehensive integration of early clinical indicators.
Bo Song, Guanjun Jiang, Yujia Liu, Dongsheng Cheng   +3 more
doaj   +2 more sources

Machine learning algorithms for prediction of cerebrospinal fluid leakage after posterior surgery for thoracic ossification of the ligamentum flavum [PDF]

Scientific Reports
To develop and validate a machine-learning (ML) model that pre-operatively predicts cerebrospinal-fluid leakage (CSFL) after posterior decompression for thoracic ossification of the ligamentum flavum (TOLF), and to elucidate the key risk factors driving ...
Ruizhou Guo, Ben Liu, Yunqi Wu, Yilu Zhang, Xiyang Wang, Dingyu Jiang, Zheng Liu   +6 more
doaj   +2 more sources

Determining the optimal ropivacaine concentration for spinal anaesthesia during day surgery for anorectal procedures: a dose-finding study [PDF]

Scientific Reports
Ropivacaine is a commonly utilized local anesthetic for spinal anesthesia (SA); however, its optimal concentration for elective anorectal surgery has not been thoroughly estimated.
Lu Chen, Xujun Dong, Jianhua Chen, Jintao Shen, Jian Liu, Shaojin Bu, Rongdan Tan, Xin-sen Zou   +7 more
doaj   +2 more sources

Isotonic Distributional Regression [PDF]

Journal of the Royal Statistical Society Series B: Statistical Methodology, 2021
AbstractIsotonic distributional regression (IDR) is a powerful non-parametric technique for the estimation of conditional distributions under order restrictions. In a nutshell, IDR learns conditional distributions that are calibrated, and simultaneously optimal relative to comprehensive classes of relevant loss functions, subject to isotonicity ...
Henzi, Alexander, Ziegel, Johanna F., Gneiting, Tilmann   +2 more
openaire   +5 more sources