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Do physicians attend to base rates? Prevalence data and statistical discrimination in the diagnosis of coronary heart disease.

Abstract：

OBJECTIVE:To examine whether physicians attend to gender prevalence data in diagnostic decision making for coronary heart disease (CHD) and to test the hypothesis that previously reported gender differences in CHD diagnostic certainty are due to discrimination arising from reliance on prevalence data ("statistical discrimination"). DATA SOURCES:A vignette-based experiment of 256 randomly sampled primary care physicians conducted from 2006 to 2007. STUDY DESIGN:Factorial experiment. Physicians observed patient presentations of cardinal CHD symptoms, standardized across design factors (gender, race, age, socioeconomic status). DATA COLLECTION:Structured interview. PRINCIPAL FINDINGS:Most physicians perceived the U.S. population CHD prevalence as higher in men (48.4 percent) or similar by gender (44.9 percent). For the observed patient, 52 percent did not change their CHD diagnostic certainty based on patient gender. Forty-eight percent of physicians were inconsistent in their population-level and individual-level CHD assessments. Physicians' assessments of CHD prevalence did not attenuate the observed gender effect in diagnostic certainty for the individual patient. CONCLUSIONS:Given an adequate presentation of CHD symptoms, physicians may deviate from their prevalence data during diagnostic decision making. Physicians' priors on CHD prevalence did not explain the gender effect in CHD certainty. Future research should examine personal stereotypes as an explanation for gender differences.

journal_name

Health Serv Res

journal_title

Health services research

authors

Maserejian NN,Lutfey KE,McKinlay JB

doi

10.1111/j.1475-6773.2009.01022.x

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

1933-49

issue

6

eissn

0017-9124

issn

1475-6773

pii

HESR1022

journal_volume

44

pub_type

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