[Adherence and toxicity to tyrosine kinase inhibitor therapy in chronic myeloid leukemia]

Farm Hosp. 2013 Nov-Dec;37(6):434-40. doi: 10.7399/FH.2013.37.6.775.
[Article in Spanish]

Abstract

Objective: To analyze adherence and toxicity of tyrosine kinase inhibitor (TKIs) therapy in patients diagnosed with chronic myeloid leukemia (CML).

Method: A 18-months retrospective observational study (January 2011-June 2012) which included all patients diagnosed with CML in a secondary hospital (550 beds) and were treated with imatinib, dasatinib or nilotinib. It was collected the following variables: sex, age at diagnosis, years of treatment and side effects. Adherence was evaluated using SMAQ questionnaire and recording dispensations.

Results: 25 patients were included and all but two (92.0%) experienced side effects to imatinib,83.3% to dasatinib and 66.7% to nilotinib. The average adherence was 71.3%. There was identified as possible parameters of lack of adherence the female patients (55.6 % vs. 66.7%, p = 0.586), older than 50 (55.6 % vs. 83.3 %, p = 0.125), more than four years of treatment (70.0 % vs. 57.1 %, p = 0.521) and the presence of certain side effects (gastrointestinal disorders and musculoeskeletal pain).

Conclusions: Almost one third of patients were considered nonadherent to therapy. Although the sample size did not allow us to establish a statistically significant relation between adherence and the variables analyzed, the clinical relevance of these results show the importance of future studies with larger populations to confirm the trends established in this study.

Objetivo: Analizar la adherencia y la toxicidad del tratamiento con inhibidores de tirosinquinasa (TKIs) en pacientes diagnosticados de Leucemia Mieloide Crónica (LMC). Método: Estudio observacional retrospectivo de 18 meses de duración (enero 2011-junio 2012) en el que se incluyeron todos los pacientes diagnosticados de LMC en un hospital de se - gundo nivel (550 camas) en tratamiento con imatinib, dasatinib o nilotinib. Las variables recogidas fueron sexo, edad de diagnóstico, años de tratamiento y reacciones adversas. La adherencia se valoró mediante un sistema combinado basado en el autocuestionario SMAQ y el registro de dispensaciones. Resultados: Se incluyeron un total de 25 pacientes. El 92,0% experimentaron reacciones adversas a imatinib; 83,3% a dasatinib y 66,7% a nilotinib. La adherencia media fue de 71,3%. Se identificaron como posibles parámetros de falta de adherencia el sexo femenino (55,6% vs. 66,7%, p = 0,586), mayores de 50 años (55,6% vs. 83,3%, p = 0,125), más de cuatro años de duración de tratamiento (70,0% vs. 57,1%, p = 0,521) y la presencia de determinados efectos adversos (trastornos gastrointestinales y dolor musculoesquelético). Conclusiones: Casi un tercio de los pacientes en tratamiento fueron considerados no adherentes. A pesar de que el tamaño muestral no nos ha permitido establecer relaciones estadísticamente significativos entre la adherencia y las variables analizadas, la relevancia clínica de estos resultados muestran la importancia de realizar futuros estudios con poblaciones mayores que confirmen las tendencias establecidas en este estudio.

Publication types

  • Observational Study

MeSH terms

  • Adult
  • Age Factors
  • Aged
  • Aged, 80 and over
  • Antineoplastic Agents / adverse effects*
  • Antineoplastic Agents / therapeutic use*
  • Benzamides / adverse effects
  • Benzamides / therapeutic use
  • Dasatinib
  • Female
  • Humans
  • Imatinib Mesylate
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / drug therapy*
  • Male
  • Middle Aged
  • Patient Compliance / statistics & numerical data*
  • Piperazines / adverse effects
  • Piperazines / therapeutic use
  • Protein Kinase Inhibitors / adverse effects*
  • Protein Kinase Inhibitors / therapeutic use*
  • Protein-Tyrosine Kinases / antagonists & inhibitors*
  • Pyrimidines / adverse effects
  • Pyrimidines / therapeutic use
  • Retrospective Studies
  • Surveys and Questionnaires
  • Thiazoles / adverse effects
  • Thiazoles / therapeutic use

Substances

  • Antineoplastic Agents
  • Benzamides
  • Piperazines
  • Protein Kinase Inhibitors
  • Pyrimidines
  • Thiazoles
  • Imatinib Mesylate
  • Protein-Tyrosine Kinases
  • nilotinib
  • Dasatinib