Results 131 to 140 of about 15,886 (254)

Penalized Spline Models for Functional Principal Component Analysis

Journal of the Royal Statistical Society Series B: Statistical Methodology, 2005
SummaryWe propose an iterative estimation procedure for performing functional principal component analysis. The procedure aims at functional or longitudinal data where the repeated measurements from the same subject are correlated. An increasingly popular smoothing approach, penalized spline regression, is used to represent the mean function.
Yao, Fang, Lee, Thomas C. M.
openaire   +2 more sources

Determining the Survival Impact and Cost‐Effectiveness of Multi‐Gene Panel Sequencing in Metastatic Colorectal Cancer With Super Learning Approaches

Health Services Research, EarlyView.
ABSTRACT Objective To determine the effectiveness and cost‐effectiveness of multi‐gene panel sequencing compared to single‐gene KRAS testing for metastatic colorectal cancer (mCRC). Study Setting and Design British Columbia, Canada (BC) is a provincial single‐payer public healthcare system, and it was the first province to publicly reimburse multi‐gene
Emanuel Krebs, Deirdre Weymann, Howard J. Lim, Stephen Yip, Dean A. Regier   +4 more
wiley   +1 more source

A global estimator of C and N isotope baselines for fresh waters

Methods in Ecology and Evolution, EarlyView.
Abstract Baselines are the pebbles in the shoes of isotope ecologists. The extreme variability of the isotope composition of resources at the base of food webs governs the spatial differences of consumers' isotope composition, so that isotope‐inferred trophic properties can be compared across ecosystems only after correction for baseline effects ...
Marie‐Elodie Perga, Stéphanie Bouletreau, Julien Cucherousset, Chris Harrod, Angus McIntosh, Julian D. Olden, Chloé Vagnon, Tim Jardine   +7 more
wiley   +1 more source

Reference percentiles for mid-upper arm circumference, upper arm muscle and fat areas of Nigerian children and adolescent population aged 0 – 19 years

Rwanda Medical Journal
INTRODUCTION: Mid-upper arm circumference (MUAC) has commonly been used for many years as an alternative nutritional status index in field settings, yet estimates of percentile range for healthy children and adolescents have not been documented in ...
M. Nwankwo, B. Danborno, S. A. Musa, A. S. Akuyam   +3 more
doaj   +2 more sources

Component Selection in the Additive Regression Model [PDF]

, 2010
Similar to variable selection in the linear regression model, selecting significant components in the popular additive regression model is of great interest.
Cui, Xia, Peng, Heng, Wen, Songqiao, Zhu, Lixing   +3 more
core  

OccuGAMs: Non‐linear occupancy and abundance modelling with imperfect detection

Methods in Ecology and Evolution, EarlyView.
Abstract Hierarchical occupancy and abundance models (HOAMs) have become a leading approach for inferring wildlife population dynamics because they explicitly account for imperfect detection. HOAMs are suitable for sampling approaches that produce detection histories from repeated visits to the same sites, including direct observations (e.g. bird point
Johannes Maria Sassen, Zachary Amir, Nicholas Clark, Matthew Scott Luskin   +3 more
wiley   +1 more source

Field‐level crop choice responses to weather‐induced yield shocks in the US Corn Belt

American Journal of Agricultural Economics, EarlyView.
Abstract As climate change increases the frequency and severity of extreme heat events, farmers are expected to face greater variability in crop yields. Using 10 million field‐level observations, this study examines how farmers in the US Corn Belt adjust corn–soybean rotation decisions in response to yield shocks largely driven by weather fluctuations.
Seunghyun Lee
wiley   +1 more source

Therapy after therapy: Entry rates into subsequent psychological treatment among patients receiving therapist‐guided internet‐delivered or face‐to‐face psychotherapy

British Journal of Clinical Psychology, EarlyView.
Abstract Objectives Despite numerous psychotherapy trials, knowledge on service‐system efficiency in terms of return to treatment is limited, especially regarding internet‐delivered cognitive behavioural therapy (iCBT). We estimated the hazard ratio (HR) of subsequent psychological treatment over several years following the initial psychological ...
A. Plattonen, S. Mylläri, S. E. Saarni, T. Rosenström   +3 more
wiley   +1 more source

Modelling non‐linear psychological processes: Reviewing and evaluating non‐parametric approaches and their applicability to intensive longitudinal data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Psychological concepts are increasingly understood as complex dynamic systems that change over time. To study these complex systems, researchers are increasingly gathering intensive longitudinal data (ILD), revealing non‐linear phenomena such as asymptotic growth, mean‐level switching, and regulatory oscillations.
Jan I. Failenschmid, Leonie V. D. E. Vogelsmeier, Joris Mulder, Joran Jongerling   +3 more
wiley   +1 more source

Detecting Critical Change in Dynamics Through Outlier Detection with Time‐Varying Parameters

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Intensive longitudinal data are often found to be non‐stationary, namely, showing changes in statistical properties, such as means and variance‐covariance structures, over time. One way to accommodate non‐stationarity is to specify key parameters that show over‐time changes as time‐varying parameters (TVPs). However, the nature and dynamics of
Meng Chen, Michael D. Hunter, Sy‐Miin Chow   +2 more
wiley   +1 more source