Results
author = "Nguti, Rosemary"
Random effects survival models applied to animal breeding data
Author(s) :
NGUTI, Rosemary
Description :
Repository :
Document Server@UHasselt
Language(s) :
Undetermined
One-sided tests in shared frailty models
Description :
Tests for the presence of heterogeneity in frailty models use an alternative hypothesis in which the heterogeneity parameter is subject to an inequality constraint. As a result, the classical likelihood ratio asymptotic chi-square distribution theory is no longer valid. Our main result state...
Repository :
Document Server@UHasselt
Language(s) :
English
Joint modelling of repeated measurements and event time: Application to performance traits and survival of lambs bred in sub-humid tropics
Description :
Abstract
We considered the analysis of a study for Dorper, Red Maasai and crossbred lambs born over a period of 6 years at the Diani Estate, Kenya. The study was designed to compare survival and performance traits of genotypes with differing susceptibilities to helminthiasis. The available...
Repository :
DOAJ-Articles
Language(s) :
Undetermined
Joint modelling of repeated measurements and event time: Application to performance traits and survival of lambs bred in sub-humid tropics
Description :
We considered the analysis of a study for Dorper, Red Maasai and crossbred lambs born over a period of 6 years at the Diani Estate, Kenya. The study was designed to compare survival and performance traits of genotypes with differing susceptibilities to helminthiasis. The available data include infor...
Repository :
Document Server@UHasselt
Language(s) :
English
Survival of Red Maasai, Dorper and crossbred lambs in the sub-humid tropics
Description :
The survival rates of Dorper, Red Maasai and crossbred lambs born over a period of 6 years at Diani Estate, Coast Province, Kenya were compared using the Cox mixed proportional hazards model with a random (frailty) term for sire. Of the 1785 lambs born, proportionately 0.44 died before they were 1 y...
Repository :
Document Server@UHasselt
Language(s) :
English
Joint modelling of repeated measurements and event time: Application to performance traits and survival of lambs bred in sub-humid tropics
Description :
We considered the analysis of a study for Dorper, Red Maasai and crossbred lambs born over a period of 6 years at the Diani Estate, Kenya. The study was designed to compare survival and performance traits of genotypes with differing susceptibilities to helminthiasis. The available data include infor...
Repository :
Europe PubMed Central
Language(s) :
English
The shared frailty model and the power for heterogeneity tests in multicenter trials
Author(s) :
DUCHATEAU, Luc
,
JANSSEN, Paul
,
LEGRAND, Catherine
,
LINDSEY, Patrick
,
NGUTI, Rosemary
,
SYLVESTER, Richard
Description :
Heterogeneity between centers in multicenter trials with time to event outcome can be modeled by the frailty proportional hazards model. The majority of the different approaches that have been used to fit frailty models assume either the gamma or the lognormal frailty density and are based on simila...
Repository :
Document Server@UHasselt
Language(s) :
English
The Association of HIV Counseling and Testing with HIV Risk Behaviors in a Random Population-based Survey in Kisumu, Kenya
Author(s) :
Huchko, Megan J.
,
Montandon, Michele
,
Nguti, Rosemary
,
Bukusi, Elizabeth A.
,
Cohen, Craig R.
Description :
HIV testing has been promoted as a key HIV prevention strategy in low-resource settings, despite studies showing variable impact on risk behavior. We sought to examine rates of HIV testing and the association between testing and sexual risk behaviors in Kisumu, Kenya. Participants were interviewed a...
Repository :
Europe PubMed Central
Language(s) :
English
Association of Attitudes and Beliefs towards Antiretroviral Therapy with HIV-Seroprevalence in the General Population of Kisumu, Kenya
Author(s) :
Cohen, Craig R.
,
Montandon, Michele
,
Carrico, Adam W.
,
Shiboski, Stephen
,
Bostrom, Alan
,
Obure, Alfredo
,
Kwena, Zachary
Description :
Repository :
Europe PubMed Central
Language(s) :
English
Adherence to Diaphragm Use for Infection Prevention: A Prospective Study of Female Sex Workers in Kenya
Author(s) :
Bukusi, Elizabeth A.
,
Gallo, Maria F.
,
Sharma, Anjali
,
Njoroge, Betty
,
Jamieson, Denise J.
,
Nguti, Rosemary
,
Bell, April J.
Description :
Objective. To assess adherence to and acceptability of the diaphragm among 140 female sex workers in Kenya in a 6-month prospective study. Methods. At baseline and bimonthly visits, participants were interviewed on diaphragm knowledge, attitude, and practices. We used principal component analy...
Repository :
Europe PubMed Central
Language(s) :
English