Measuring symptoms as a critical component of drug development and evaluation in hematological diseases

Prioritizing the worries of AML patients: Quantifying patient experience using best-worst scaling

CONTEXT

Although patients with acute myeloid leukemia (AML) experience significant toxicities and poor outcomes, few studies have quantified patients' experience.

METHODS

A community-centered approach was used to develop an AML-specific best-worst scaling (BWS) instrument involving 13 items in four domains (psychological, physical, decision-making, and treatment delivery) to quantify patient worry. A survey of patients and caregivers was conducted using the instrument. Data were analyzed using conditional logistic regression.

RESULTS

The survey was completed by 832 patients and 237 caregivers. Patients were predominantly white (88%), married/partnered (72%), and in remission (95%). The median age was 55 years (range: 19-87). Median time since diagnosis was 8 years (range: 1-40). Patients worried most about "the possibility of dying from AML" (BWS score = 15.5, confidence interval [CI] [14.2-16.7]) and "long-term side effects of treatments" (14.0, CI [12.9-15.2]). Patients found these items more than twice as worrisome as all items within the domains of care delivery and decision-making. Patients were least worried about "communicating openly with doctors" (2.50, CI [1.97-3.04]) and "having access to the best medical care" (3.90, CI [3.28-4.61]). Caregiver reports were highly correlated to patients' (Spearman's ρ = 0.89) though noted significantly more worry about the possibility of dying and spending time in the hospital.

CONCLUSION

This large convenience sample demonstrates that AML patients have two principal worries: dying from their disease and suffering long-term side effects from treatment. To better foster patient-centered care, therapeutic decision-making and drug development should reflect the importance of both potential outcomes. Further work should explore interventions to address these worries.

What symptoms are important to patients? Developing a symptom burden measure for women with breast cancer

PURPOSE

The American Cancer Society predicted that 266,120 women would be diagnosed with breast cancer in 2018. Women experience significant symptom burden in response to tumor and treatment-related adverse effects, particularly in advanced disease. Use of valid and reliable patient-reported outcomes (PRO) symptom measures may assist clinicians in systematically monitoring and managing symptoms. The MD Anderson Symptom Inventory (MDASI) is a brief PRO measure of cancer symptom burden; specific symptoms can be added to the core symptoms to produce disease- and treatment-specific modules. The purpose of this study was to describe the patient symptom experience, define the content domain, and generate items for a breast cancer-specific MDASI module for measuring symptom burden in women with breast cancer.

METHODS

Women with breast cancer were qualitatively interviewed about their experiences of disease and treatment. Descriptive exploratory analysis identified symptoms and symptom interference to define the symptom burden of breast cancer. An expert panel rated the relevance of the identified symptoms to patients with breast cancer.

RESULTS

A conceptual model of breast cancer symptom burden was developed from interviews with 36 women (mean age of 57.9 years, 86.1% had stages I-III, and 52.8% were on chemotherapy and/or radiation therapy) across the breast cancer disease and treatment trajectory. Thirty-six symptoms and 6 interference categories were identified. Symptoms specific to treatment modalities and breast cancer met the criteria for inclusion in the provisional instrument for psychometric testing.

CONCLUSIONS

We generated an instrument with content validity for measuring symptom burden specific to women with breast cancer.

Chronic Myeloid Leukemia: What Every Practitioner Needs to Know in 2017

The prognosis of chronic phase chronic myeloid leukemia (CML) has improved so that life expectancy for patients responding to tyrosine kinase inhibitors (TKIs) is now equivalent to age-matched controls. Attention should be paid to comorbidities that impact survival. The success of TKI therapy can be easily and reliably assessed at well-accepted time points using quantitative polymerase chain reaction (PCR) standardized to the international scale. Patient-reported outcome (PRO) tools are readily available for use in the clinic and provide complementary information on the tolerance of TKIs. Effectively managing adverse events of TKIs can improve compliance and quality of life. Discontinuation of TKIs is the next frontier in CML. In select patients with sustained deep molecular remission, a discontinuation of TKI is associated with a durable treatment-free remission in approximately 50%. Patient engagement in their discontinuation can be achieved through a provider multi-team coaching, is complementary to the available guidelines, and may provide an additional safety net so that these discontinuations remain safe when applied in general practices.