RESUMO
BACKGROUND: Tyrosine kinase inhibitors such as imatinib have improved survival in chronic myeloid leukemia (CML). Imatinib can cause chronic side effects which are not considered serious but can impact the quality of life (QoL) of the patient. METHODS: The results of a detailed symptom burden analysis and its impact on QoL scores in a cohort of patients on long-term imatinib is presented in this study. Symptom burden was assessed using the M. D. Anderson Symptom Inventory specific for CML patients. An indigenously developed QoL questionnaire (Cancer Institute Quality of Life II) was administered simultaneously. RESULTS: Of 221 patients of CML (M:F = 133:88; median age: 39 years [18-65], median duration of imatinib: 4 years), QoL scores were high in 46%, average in 39%, and low in 14%. QoL scores were negatively correlated with general symptoms (r = -0.612, P < 0.001), CML-specific symptoms (r = -0.513, P < 0.001), and interference of symptoms (r = -0.596, P < 0.001). CONCLUSIONS: Significant impairment of QoL was noted among patients with CML primarily due to the burden of symptom related to side effects of imatinib. This issue must be addressed both in the clinic as well as in all studies of CML.
RESUMO
BACKGROUND: Adherence to oral therapy over a long period is important for optimal outcomes in chronic myeloid leukemia (CML). METHODS: Patients in the chronic phase of CML (taking imatinib for ≥ 6 months) were assessed by the 8-item Morisky Medication Adherence Scale and European Organisation for Research and Treatment of Cancer Quality of Life (QoL) Questionnaire (C30 and CML 24). Patients were classified as adherent (score 8) and nonadherent (score ≤ 7) as per the 8-item Morisky Medication Adherence Scale. RESULTS: Among 221 patients (male to female ratio = 133:88; median age, 39 (18-65) years; median duration of imatinib, 4 years), the nonadherence rate was 55% (N = 122/221). None of the demographic parameters, including occupation, education status, income, and availability of caregiver, were associated with nonadherence. QoL scores, especially the symptom scores associated with side effects of imatinib, significantly differed between adherent and nonadherent patients. Multivariate analysis revealed global health status as the sole predictor of adherent behavior (odds ratio, 0.978; 95% confidence interval, 0.963-0.994; P = .007). A higher proportion of adherent patients achieved deeper molecular responses. Low QoL was associated with nonadherence to imatinib in patients with CML. CONCLUSIONS: It is likely that increased long-term symptom burden due to side effects of imatinib could contribute to nonadherence. Interventions targeting individual components of QoL may improve adherence and outcomes in CML.
