Effectiveness of the use of an algorithm in the diagnostic approach of joint pain patients by primary care physicians

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Rheumatology International https://doi.org/10.1007/s00296-020-04552-1

INTERNATIONAL

OBSERVATIONAL RESEARCH

Effectiveness of the use of an algorithm in the diagnostic approach of joint pain patients by primary care physicians D. G. Fernández‑Ávila1   · M. X. Rojas2   · C. Ramírez3   · L. Rodelo4   · E. Soriano5  Received: 11 January 2020 / Accepted: 11 March 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020

Abstract There is a high percentage of error in the approach of patients with joint pain by primary care physicians. An algorithm can help improve this misdiagnosis problem. Our study seeks to determine the effectiveness of an algorithm when used by primary care physicians for the diagnosis of cases of joint pain patients. A randomized clinical experiment was carried out. Primary care physicians from five cities in Colombia developed a series of clinical cases, which were presented to them through a website on their personal cell phones. Half of the doctors developed the cases using the diagnostic algorithm, and the other half developed the cases without the use of the algorithm. Main measures were proportion of correct diagnosis, number, type of laboratory and diagnostic images requested for the diagnostic approach of clinical cases. Two hundred and twenty-four primary care physicians participated. The overall proportion of cases correctly diagnosed was 37.3% higher in the intervention group; we found a greater difference in cases of spondyloarthritis (60.8%), followed by systemic lupus erythematosus with joint involvement (32.2%), rheumatoid arthritis (30.3%) and osteoarthritis (25.9%). The average number of tests requested to develop clinical cases was lower in the intervention group than in the control group, both globally and for each of the four diseases, with statistically significant differences for each of the comparisons. The diagnostic algorithm proved to be an effective tool when used by primary care physicians; the proportion of correct diagnoses increased, and the number of tests requested in the development of the cases decreased. Keywords  Algorithms · Arthralgia · Rheumatoid arthritis · Osteoarthritis · Spondyloarthritis · Systemic lupus erythematosus

Introduction

* D. G. Fernández‑Ávila [email protected] 1



PhD Program in Clinical Epidemiology, Department of Clinical Epidemiology and Biostatistics, School of Medicine, Pontificia Universidad Javeriana—Hospital Universitario San Ignacio, Bogotá, Colombia

2



Department of Clinical Epidemiology and Biostatistics, School of Medicine, Pontificia Universidad Javeriana, Bogotá, Colombia

3

Rheumatoid Arthritis Program, Sánitas EPS, Bogotá, Colombia

4

Javesalud IPS, Bogotá, Colombia

5

Rheumatology Section, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina



There are failures in the correct diagnosis of rheumatic diseases by primary care doctors, as was demonstrated in two studies of our research group [1, 2] and in one conducted by the University of Alberta in Canada, in which it was found tha