Document Type

Article

Publication Date

2-21-2013

Publication Title

BMJ (Clinical Research Edition)

Abstract

Objective: To determine the bias associated with frequency of visits by physicians in adjusting for illness, using diagnoses recorded in administrative databases.

Setting: Claims data from the US Medicare program for services provided in 2007 among 306 US hospital referral regions.

Design: Cross sectional analysis. Participants 20% sample of fee for service Medicare beneficiaries residing in the United States in 2007 (n=5 153 877).

DOI

10.1136/bmj.f549

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