Abstract：
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 models, have been suggested to account for conditional dependence. METHODS:We present a step-by-step guide to identify important dependencies between fields through a correlation residual plot and demonstrate how they can be incorporated into loglinear models for record linkage. This method is applied to healthcare data from the patient registry for a large county health department. RESULTS:Our method could be readily implemented using standard software (with code supplied) to produce an overall better model fit as measured by BIC and deviance. Finding the most parsimonious model is known to reduce bias in parameter estimates. CONCLUSIONS:This novel approach identifies and accommodates conditional dependence in the context of record linkage. The conditional dependence model is recommended for routine use due to its flexibility for incorporating conditional dependence and easy implementation using existing software.
journal_name
BMC Med Inform Decis Makjournal_title
BMC medical informatics and decision makingauthors
Daggy JK,Xu H,Hui SL,Gamache RE,Grannis SJdoi
10.1186/1472-6947-13-97subject
Has Abstractpub_date
2013-08-30 00:00:00pages
97issn
1472-6947pii
1472-6947-13-97journal_volume
13pub_type
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