BACKGROUND Methods for linking real-world healthcare data often use a latent class model, where the latent, or unknown, class is the true match status of candidate record-pairs. This commonly used model assumes that agreement patterns among multiple fields within a latent class are independent. When this assumption is violated, various approaches, including the most commonly proposed loglinear ...

Schizophrenia is considered a lifetime disorder, but in practice its diagnosis in a given patient can change over time. This study used a large clinical data that consisted of 4725 adult inpatients who had been admitted to hospitals twice to study the temporal stability of diagnosis of schizophrenia and to examine the change in the diagnosis between the two occasions. First, we measured tempora...

Recent neurobiological models of ADHD suggest that deficits in different neurobiological pathways may independently lead to symptoms of this disorder. At least three independent pathways may be involved: a dorsal frontostriatal pathway involved in cognitive control, a ventral frontostriatal pathway involved in reward processing and a frontocerebellar pathway related to temporal processing. Impo...

To evaluate the impact cirrhosis has on survival the records of 40 cirrhotic trauma victims from the registries of two Level 1 trauma centers were reviewed and probability of survival calculated using the TRISS methodology. Mechanism of injury, anatomic location, involvement of single or multiple sites, presence of ascites, elevations in serum glutamic oxaloacetic transaminase (SGOT), alkaline ...

In square contingency tables, analysis of agreement between row and column classifications is interest. For nominal categories, kappa co- efficient used to summarize the degree two raters. Numerous extensions generalizations statistics have been pro- posed in literature. addition coefficient, several authors use terms log-linear models. This paper focuses on approaches study interrater for tabl...

Rating scales for outcome variables produce categorical data which are often ordered and measurements from rating scales are not standardized. The purpose of this study is to apply commonly used and novel methods for paired ordered categorical data to two data sets with different properties and to compare the results and the conditions for use of these models. The two applications consist of a ...