Results 51 to 60 of about 17,919,150 (332)

Estimation of time-varying treatment effects using marginal structural models dependent on partial treatment history

Journal of Causal Inference
Inverse probability (IP) weighting of marginal structural models (MSMs) can provide consistent estimators of time-varying treatment effects under correct model specifications and identifiability assumptions, even in the presence of time-varying ...
Seya Nodoka, Taguri Masataka, Ishii Takeo   +2 more
doaj   +1 more source

Evaluation of Commercial Phytases on Performance and Skeletal Strength of Two Broiler Strains

The Journal of Poultry Science, 2011
An experiment was conducted to evaluate the effects of two commercial phytases on performance and bone mineralization of male broilers from two commercial strains when included into a diet marginal in both calcium (Ca) and non-phytate phosphorus (npP ...
Ashley L. Shaw, John P. Blake, Edwin T. Moran, Jr.   +2 more
doaj   +1 more source

WELFARE ANALYSIS VIA MARGINAL TREATMENT EFFECTS

Econometric Theory
We consider a causal structure with endogeneity, i.e., unobserved confoundedness, where an instrumental variable is available. In this setting, we show that the mean social welfare function can be identified and represented via the marginal treatment effect as the operator kernel.
Sasaki, Yuya, Ura, Takuya
openaire   +2 more sources

Social Functioning Within the First Years After Pediatric Brain Tumor Diagnosis and the Relationship With Family Psychosocial Risk

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Survivors of pediatric brain tumors (PBTs) can experience long‐term social difficulties, impacting quality of life. Beyond medical and environmental factors, family psychosocial risk may play a role in social outcomes by shaping the caregiving environment and may provide intervention options.
Renske H. Houben, Marisa H. Huisman, Martha A. Grootenhuis, Femke K. Aarsen, Marita Partanen   +4 more
wiley   +1 more source

Nonparametric tests of conditional treatment effects [PDF]

, 2009
We develop a general class of nonparametric tests for treatment effects conditional on covariates. We consider a wide spectrum of null and alternative hypotheses regarding conditional treatment effects, including (i) the null hypothesis of the ...
Whang, Yoon-Jae, Whang, Y.-J., Yoon-Jae Whang, Lee, S., Lee, Sokbae, Sokbae (Simon) Lee   +5 more
core   +1 more source

Non-collapsibility and built-in selection bias of period-specific and conventional hazard ratio in randomized controlled trials

BMC Medical Research Methodology
Background The hazard ratio of the Cox proportional hazards model is widely used in randomized controlled trials to assess treatment effects. However, two properties of the hazard ratio including the non-collapsibility and built-in selection bias need to
Helen Bian, Menglan Pang, Guanbo Wang, Zihang Lu   +3 more
doaj   +1 more source

Effects of intensive long-term pollution on macroinvertebrates communities of the middle Tietê River basin (São Paulo, Brazil) [PDF]

Brazilian Journal of Biology
The study investigates the impact of long-term intensive pollution on benthic macroinvertebrates in the middle Tietê River basin. We performed two distinct comparisons: (i) between two lotic systems with contrasting water quality, the highly degraded ...
C. Magro, M. G. Nogueira
doaj   +2 more sources

A modified surgical approach for hard and soft tissue reconstruction of severe periimplantitis defects: laser-assisted periimplant defect regeneration (LAPIDER)

International Journal of Implant Dentistry, 2020
Background The main problem in periimplantitis is often the combination of severe periimplant bone loss with a contaminated implant surface and an insufficient soft tissue situation.
Robert Noelken, Bilal Al-Nawas
doaj   +1 more source

IBRUTİNİB-OBİNUTUZUMAB COMBİNATİON THERAPY İN THE TREATMENT OF RELAPSED NODAL MARGİNAL ZONE LYMPHOMA: A CASE STUDY

Hematology, Transfusion and Cell Therapy, 2023
Background: Marginal Zone Lymphoma (MZL) is a type of non-Hodgkin lymphoma (NHL) originating from B-lymphocytes. It is characterized as a slow-growing or indolent lymphoma and is considered a rare disease. The report focuses on a case of MZL diagnosed in
Nuray Gül Açar, İbrahim Halil Açar, Birol Güvenç   +2 more
doaj   +1 more source

Linear mixed models with endogenous covariates: modeling sequential treatment effects with application to a mobile health study

Statistical Science, 2019
Mobile health is a rapidly developing field in which behavioral treatments are delivered to individuals via wearables or smartphones to facilitate health-related behavior change.
Tianchen Qian, P. Klasnja, S. Murphy
semanticscholar   +1 more source