نتایج جستجو برای: cumulative incidence function
تعداد نتایج: 1489315 فیلتر نتایج به سال:
Estimating the age-specific incidence of an emerging pathogen is essential for understanding its severity and transmission dynamics. This paper describes a statistical method that uses likelihoods to estimate incidence from sequential serological data. The method requires information on seroconversion intervals and allows integration of information on the temporal distribution of cases from cli...
BACKGROUND Since 1995, measles vaccination at nine and 18 months has been routine in South Africa; however, coverage seldom reached >95%. We describe the epidemiology of laboratory-confirmed measles case-patients and assess the impact of the nationwide mass vaccination campaign during the 2009 to 2011 measles outbreak in South Africa. METHODS Serum specimens collected from patients with suspe...
BACKGROUND For those who initiate chronic dialysis, knowing what proportion will experience 3-year outcomes of hemorrhage with hospitalization informs patient prognosis, disease impact, and the planning of trials and programs to prevent events. OBJECTIVES We examined the incidence of hemorrhage and related gastrointestinal endoscopic procedures in incident older dialysis patients and stratifi...
STUDY OBJECTIVE To study differences between various methods of estimating cancer risk in individuals. DESIGN Information was obtained from a cancer registry. Lifetime risk was calculated using the life table method, taking competing causes of death into account and using well recognised methods such as the cumulative rate and risk. SETTING Regional cancer registry of the Comprehensive Canc...
BACKGROUND Direct-to-consumer promotion of lung cancer screening has increased, especially low-dose computed tomography (CT). However, screening exposes healthy persons to potential harms, and cumulative false-positive rates for low-dose CT have never been formally reported. OBJECTIVE To quantify the cumulative risk that a person who participated in a 1- or 2-year lung cancer screening examin...
BACKGROUND The risk of a disease or psychiatric disorder is frequently measured by the age-specific cumulative incidence. Cumulative incidence estimates are often derived in cohort studies with individuals recruited over calendar time and with the end of follow-up governed by a specific date. It is common practice to apply the Kaplan-Meier or Aalen-Johansen estimator to the total sample and rep...
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