Publish in this journal
Journal Information
Vol. 73. Issue 8.
Pages 690-691 (August 2020)
Vol. 73. Issue 8.
Pages 690-691 (August 2020)
Letter to the Editor
Full text access
116? How much should LDL-C be lowered in the «low risk» population?
¿116? ¿Hasta cuánto hay que bajar el cLDL de la población catalogada como en «bajo riesgo»?
Visits
...
Juan Carlos Aguirre Rodríguez
Centro de Salud Fortuny, Distrito Sanitario Granada, Granada, Spain
Article information
Full Text
Bibliography
Download PDF
Statistics
Full Text
To the Editor,

Although the target values for plasma lipid concentrations have been revised and reduced, there is no consensus as to whether or not low density lipoprotein cholesterol (LDL-C) levels should be treated according to target values.1,2

The American Heart Association/American College of Cardiology guidelines published in 20143 recommended a “shoot and forget” strategy in which the strength of the statin selected was more in line with the patients’ cardiovascular risk (CVR) than with their final target.

In the European Society of Cardiology guidelines published on 31 August 2019, the recommended LDL-C level for the low-risk population (score, <1%) is <116mg/dL.4 This recommendation was already present in the previous guidelines of 2016,5 but with a huge difference: At that time, the recommendation specified “lifestyle recommendations” (no intervention on lipids) when LDL-C concentration was 155 to 190mg/dL and the CVR was <1%, whereas now it indicates “Lifestyle intervention, consider adding drug if uncontrolled” when LDL-C is between 116 and 190 mg/dL at the same CVR (see table 5 in both guidelines).4,5

Then I wondered, how many of my patients, regardless of their CVR, had LDL-C values <116mg/dL without receiving treatment, and how many had those values with treatment? I reviewed the analysis requests for the past week and found that more than 70% of patients had values >116mg/dL; that is, they would need drug treatment. Looking at a larger database6 and without taking diabetes or CVR into consideration, a similar percentage of patients would have to be treated.

In light of the possibility of a huge increase in lipid-lowering treatments, I delved more deeply into the recent recommendations (p. 22).4 The LDL-C value of <116 in low-risk individuals is based on reference 36, from 2012, by Mihaylova et al.7 (also an author of the 2019 guidelines4). Hence, the current guidelines used an article from 2012 to support recommendations for 2019.

The study by Mihaylova did not propose any LDL-C target goal, much less 116. It was focused on avoidable events in populations with different CVR levels by decreasing LDL-C by 1 mmol (38 mg/dL), which, parenthetically, yielded a nonnegligible number of patients that would have to be treated.7

Where did the authors of the current guidelines get this value of 116? Is there a reference for the article from 2012 in the 2016 guidelines by the same authors? Remember, in 2016 the recommendation was not to intervene if the LDL-C concentration was between 155 and 190 mg/dL (p. 13, Table 5).5 As the article states: “Low-risk people should be given advice to help them maintain this status” (references 61-71). Furthermore, on page 17 the text says: “… the task force accepts that the choice of any given target goal for LDL-C may be open to debate… (references 65 and 66).

As it turns out, reference 66, which contributes to sustaining these 2 statements, is the same as reference 36 in the 2019 guidelines: the study by Mihylova et al.7

In summary, the 2019 European guidelines4 cite a study from 20127 to recommend LDL-C target goals for low-risk patients, but in 20165 they use the same reference to support very different recommendations.

What does this mean? And if it were really appropriate to attempt a goal of <116 mg/dL in low-risk patients, which would imply medicating around 70% of the population, could any health system sustain it?

.

References
[1]
Ministerio de Sanidad, Servicios Sociales e Igualdad y Departamento de Salud del Gobierno Vasco (OSTEBA). Guía de Práctica Clínica sobre el manejo de los lípidos como factor de riesgo cardiovascular. 2017. Available at: https://portal.guiasalud.es/wp-content/uploads/2018/12/GPC_567_Lipidos_Osteba_compl.pdf. Accessed 10 Mar 2020.
[2]
Infac (Información Farmacoterapéutica de la Comarca). Los lípidos como factor de riesgo cardiovascular: tratamiento farmacológico. 2014. Available at: https://www.euskadi.eus/contenidos/informacion/cevime_infac_2014a/es_def/adjuntos/INFAC_Vol_22_n_7_bis.pdf. Accessed 10 Mar 2020.
[3]
N.J. Stone, J.G. Robinson, A.H. Lichtenstein, et al.
2013 ACC/AHA guideline on the treatment of blood cholesterol to reduce atherosclerotic cardiovascular risk in adults: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines.
Circulation., 129 (2014), pp. S1-S45
[4]
F. Mach, C. Baigent, A.L. Catapano, et al.
ESC Scientific Document Group 2019 ESC/EAS Guidelines for the management of dyslipidaemias: lipid modification to reduce cardiovascular risk: The Task Force for the management of dyslipidaemias of the European Society of Cardiology (ESC) and European Atherosclerosis Society (EAS).
Eur Heart J., 41 (2020), pp. 111-188
[5]
A.L. Catapano, I. Graham, G.G. DeBacker, et al.
Guía ESC/EAS 2016 sobre el tratamiento de las dislipemias.
Rev Esp Cardiol., 70 (2017), pp. 115
[6]
J.C. Aguirre, A. Hidalgo, M. Mené, D. Martín, A. De Cruz, M.T. García.
Grado de control cardiovascular en pacientes diabéticos tipo 2 de acuerdo con objetivos individualizados: Estudio «CONCARDIA».
[7]
Cholesterol Treatment Trialists Collaboration, Mihaylova B, Emberson J, et al. The effects of lowering LDL cholesterol with statin therapy in people at low risk of vascular disease: meta-analysis of individual data from 27 randomised trials. Lancet. 2012;380:581-590.
Copyright © 2020. Sociedad Española de Cardiología
Idiomas
Revista Española de Cardiología (English Edition)

Subscribe to our newsletter

View newsletter history
Article options
Tools
es en

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?