Development and Content Validity Testing of a Patient-Reported Treatment Acceptance Measure for Use in Patients Receiving Treatment via Subcutaneous Injection

Development and content validation of the Satisfaction and Experience Questionnaire for Granulocyte Colony-Stimulating Factor (SEQ-G-CSF)

BACKGROUND

Several options for granulocyte colony-stimulating factor (G-CSF) prophylaxis of chemotherapy-induced febrile neutropenia are available to patients worldwide. We have developed a novel patient-reported outcome measure, the Satisfaction and Experience Questionnaire for G-CSF (SEQ-G-CSF), to help understand patients' perspectives of and satisfaction with different G-CSF options.

RESULTS

Three oncology nurses and 40 adult oncology patients in the United States were enrolled and participated in focus group discussions to develop and refine the SEQ-G-CSF. Nurses had ≥ 5 years of experience treating oncology patients and were currently involved in the management of oncology patients receiving G-CSF prophylaxis. The patients had breast cancer, lung cancer, non-Hodgkin lymphoma, or prostate cancer (10 patients in each group) and were receiving G-CSF prophylaxis via injection or the on-body injector (OBI) device. The preliminary SEQ-G-CSF contained an item relevance questionnaire and three SEQ modules (sociodemographic, medical history, and G-CSF-related healthcare characteristics questionnaires). Twenty-one patients (53% of total sample size) discussed their experience and satisfaction with G-CSF. Their most common experiences were G-CSF effectiveness, convenience and benefits of the OBI, and relationships with healthcare providers. Side effects and having to undergo additional treatment were also reported. Satisfaction with aspects of G-CSF included the OBI and effectiveness of G-CSF treatment; dissatisfaction included inconvenience (having to return to the clinic the next day and administration of the injection) and the insurance approval process. The SEQ-G-CSF was finalized after three rounds of cognitive interviews and includes five domains related to general satisfaction (one item), treatment burden (four items), travel burden (two items), time burden (four items), and treatment compliance (two items).

CONCLUSIONS

The SEQ-G-CSF is a novel instrument that quantifies a patient's experience and satisfaction with different G-CSF options using 13 easy-to-understand items. This study provides evidence for the content validity of SEQ-G-CSF. Although further psychometric testing is required, the SEQ-G-CSF may be a useful addition to clinical trials, observational studies, and clinical practice.

Psychometric Properties of the Spanish Version of the Functional Evaluation of Cardiac Health Questionnaire "FETCH-Q™" for Assessing Health-related Quality of Life in Dogs with Cardiac Disease

To evaluate the psychometric properties of the Spanish version of the "FETCH-Q™", 228 dogs with cardiovascular diseases were included. After forward and back translation of the original questionnaire, nonexperts, ethologists and veterinary colleagues evaluated the content's validity through feedback. For criteria validity, the total score was correlated with the heart disease/failure class. For construct validity, the overall quality of life of the dog and the results obtained in each question was correlated. The reliability of the questionnaire was assessed using the Cronbach's alpha coefficient. To evaluate the test-retest validity the intra-class correlation coefficient and Wilcoxon signed-rank test were used. A good agreement with the original questionnaire was evident. For construct validity, the questionnaire obtained r > 0.09 to < 0.82. The criterion validity was appropriate and the correlation was rho = 0.82, with an effect size of 0.55 (P < 0.05). Cronbach's alpha coefficient was (α = 0.89). The test-retest assessment revealed adequate repeatability (correlation coefficient = 0.87; P < .001). There was no difference in the owner responses to the questionnaire at baseline and 2 weeks later in dogs with stable cardiac disease (P > .05). This study supports the validity of psychometric properties of the Spanish version of the functional evaluation of cardiac health questionnaire "FETCHSV2-Q™" to assess Health-related Quality of Life in dogs with cardiovascular disease in clinical settings and research.

The SYDNEY Device Study: A Multicenter, Randomized, Open-label Usability Study of a 2-mL Alirocumab Autoinjector Device

PURPOSE

The proprotein convertase subtilisin/kexin type 9 inhibitor alirocumab has produced significant reductions in LDL-C at a dose of 300 mg q4w administered as 2 separate 150-mg injections via a 1-mL autoinjector (AI). A recently developed 2-mL device (SYDNEY) permits the administration of a single 300mg dose of alirocumab.

METHODS

We assessed the usability and product technical complaints (PTCs) reported by patients using the 2-mL SYDNEY device in unsupervised settings, adverse events, and effects on LDL-C, in a multicenter, randomized, open-label, 16-week study conducted in the United States. For their first dose, 69 patients with hypercholesterolemia despite receiving statin with or without other lipid-lowering therapy randomly received supervised, self-administered alirocumab 300 mg via 1 × 300 mg injection with the SYDNEY device (n = 35) or 2 × 150-mg injections with the currently approved AI (n = 34). All continuing patients subsequently received unsupervised, self-administered alirocumab 300 mg q4w using the SYDNEY device at weeks 4, 8, and 12. The primary end point was the proportion of SYDNEY device-associated PTCs related to the use of the unsupervised injections.

FINDINGS

Baseline characteristics between the study arms varied only in a higher percentage of males being randomized to the study arm using the SYDNEY device (74.3%) compared with the AI arm (44.1%). A single PTC was reported during the unsupervised injections (0.5%; 1 of 196 injections; 95% CI, 0.0%-3.2%). This event was classified as patient related as opposed to device related. No PTCs occurred during supervised injections. Mean LDL-C reductions from baseline at week 4 were 66.2% with SYDNEY and 51.2% with the AI; after adjustment for sex differences between groups, mean LDL-C reductions were 63.5% and 53.9%, respectively. LDL-C reductions persisted for 16 weeks. The most common adverse event was upper respiratory tract infection (3 with SYDNEY and 0 with the AI during weeks 0-4).

IMPLICATIONS

The SYDNEY device allowed for a single 2-mL injection of alirocumab 300 mg, providing substantial LDL-C reductions with no new product technical issues or no new safety concerns compared with the currently marketed 1-mL AI device. In conclusion, the 2-mL SYDNEY device provides patients with the possibility of injecting the 300-mg alirocumab dose as a single injection. ClinicalTrials.gov identifier: NCT03415178.

The patient journey with proprotein convertase subtilisin/kexin type 9 inhibitors in community practice

BACKGROUND

Trials have demonstrated that proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors are effective as an adjunct to statin therapy, but access and cost issues have limited their use in community practice.

OBJECTIVE

The aim of the study was to better understand patients' experiences when trying to obtain, fill, and use PCSK9 inhibitor therapy in community practice.

METHODS

We conducted a patient survey to evaluate patient experiences with PCSK9 inhibitors including medication initiation, indication for treatment, insurance approval status, medication persistence, and reason for discontinuation. The survey was emailed to 4740 adults who used a patient access support program.

RESULTS

Overall, 1327 of 4740 adults completed the survey (28.0% response rate). Of those, 75.0% were aged >60 years, 52.8% were male, and 92.4% were White. At the time of PCSK9 inhibitor prescription, 70.2% were not on a statin (with 84.4% of those not on a statin reporting statin intolerance). Overall, 74.6% of patients found the drug approval process to be "somewhat" or "very" burdensome. Among n = 1216 patients who initiated treatment, 33.7% discontinued by the time of the survey, with 50.0% taking the drug for 1 to 6 months. Patient out-of-pocket costs were the leading reported reason for discontinuation.

CONCLUSIONS

Most PCSK9 inhibitor users in community practice were not on a statin, presumably because of statin intolerance. The drug approval process and costs continue to be strong reasons for lower initiation of PCSK9 agents, as well as higher discontinuation rates.

Treatment Preferences in Germany Differ Among Apheresis Patients with Severe Hypercholesterolemia

BACKGROUND

Severe hypercholesterolemia is a major risk factor of death in patients with coronary heart disease. New adjunctive drug therapies (proprotein convertase subtilisin/kexin type 9 [PCSK9] inhibitors) have gained approval in Europe and the USA.

OBJECTIVE

In this empirical study, we documented preferences regarding adjuvant drug therapy in apheresis-treated patients with severe familial hypercholesterolemia.

METHODS

We conducted a systematic literature search to identify patient-relevant outcomes in patients with severe hypercholesterolemia currently undergoing apheresis. Data were used to generate a semi-structured qualitative interview that enabled seven patient-relevant characteristics with three levels each to be identified. For the discrete choice experiment, an experimental design (7 × 3) was generated using NGene Software that consisted of 96 choices divided into eight blocks. The survey was conducted between November 2015 and April 2016 using computer-assisted personal interviews.

RESULTS

The survey was completed by 348 patients (64.9% male). The random parameter logit estimation showed predominance for the attribute 'reduction of LDL-C (low-density lipoprotein cholesterol) level'. 'Risk of myopathy' and 'frequency of apheresis' dominated next. Within the random parameter logit estimation, all coefficients were significant (P ≤ 0.01). The latent class analysis identified three patient groups. The first group (126 patients) found 'reduction of LDL-C level in blood' to be most important. This group focused solely on this treatment outcome independently of apheresis frequency or additional injections. The second group (106 patients) focused on three attributes: 'frequency of apheresis', 'risk of myopathy', and 'reduction of LDL-C level in blood'. Respondents clearly considered a high frequency of apheresis to have a negative impact. The third group (116 patients) demonstrated the highest preference for apheresis. These patients have adjusted to apheresis for > 10 years.

CONCLUSION

Regarding patient preference, clinical efficacy seems to dominate. Hence, 'reduction of LDC-C in blood' was ranked highest above patient-relevant modes of administration and adverse effects. In the patient groups identified, reduction of apheresis was important for only a subsegment (30%) of patients. Another 30% wanted effective LDL-C reduction by whatever means necessary. Most strikingly, another 30% preferred higher frequencies of apheresis.

Design and rationale of the ODYSSEY DM-DYSLIPIDEMIA trial: lipid-lowering efficacy and safety of alirocumab in individuals with type 2 diabetes and mixed dyslipidaemia at high cardiovascular risk

Background

Type 2 diabetes mellitus (T2DM) is often associated with mixed dyslipidaemia, where non-high-density lipoprotein cholesterol (non-HDL-C) levels may more closely align with cardiovascular risk than low-density lipoprotein cholesterol (LDL-C). We describe the design and rationale of the ODYSSEY DM-DYSLIPIDEMIA study that assesses the efficacy and safety of alirocumab, a proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitor, versus lipid-lowering usual care in individuals with T2DM and mixed dyslipidaemia at high cardiovascular risk with non-HDL-C inadequately controlled despite maximally tolerated statin therapy. For the first time, atherogenic cholesterol-lowering with a PCSK9 inhibitor will be assessed with non-HDL-C as the primary endpoint with usual care as the comparator.

Methods

DM-DYSLIPIDEMIA is a Phase 3b/4, randomised, open-label, parallel group, multinational study that planned to enrol 420 individuals. Main inclusion criteria were T2DM and mixed dyslipidaemia (non-HDL-C ≥100 mg/dl [≥2.59 mmol/l], and triglycerides ≥150 and <500 mg/dl [≥1.70 and <5.65 mmol/l]) with documented atherosclerotic cardiovascular disease or ≥1 additional cardiovascular risk factor. Participants were randomised (2:1) to alirocumab 75 mg every 2 weeks (Q2W) or lipid-lowering usual care on top of maximally tolerated statin (or no statin if intolerant). If randomised to usual care, investigators were able to add their pre-specified choice of one of the following to the patient’s current statin regimen: ezetimibe, fenofibrate, omega-3 fatty acids or nicotinic acid, in accordance with local standard-of-care. Alirocumab-treated individuals with non-HDL-C ≥100 mg/dl at week 8 will undergo a blinded dose increase to 150 mg Q2W at week 12. The primary efficacy endpoint is non-HDL-C change from baseline to week 24 with alirocumab versus usual care; other lipid levels (including LDL-C), glycaemia-related measures, safety and tolerability will also be assessed. Alirocumab will be compared to fenofibrate in a secondary analysis.

Results

Recruitment completed with 413 individuals randomised in 14 countries worldwide. Results of this trial are expected in the second quarter of 2017.

Conclusions

ODYSSEY DM-DYSLIPIDEMIA will provide information on the efficacy and safety of alirocumab versus lipid-lowering usual care in individuals with T2DM and mixed dyslipidaemia at high cardiovascular risk using non-HDL-C as the primary efficacy endpoint.

Trial registration NCT02642159 (registered December 24, 2015)

Electronic supplementary material

The online version of this article (doi:10.1186/s12933-017-0552-4) contains supplementary material, which is available to authorized users.

Efficacy and safety of alirocumab in insulin-treated patients with type 1 or type 2 diabetes and high cardiovascular risk: Rationale and design of the ODYSSEY DM-INSULIN trial

AIMS

The coadministration of alirocumab, a PCSK9 inhibitor for treatment of hypercholesterolaemia, and insulin in diabetes mellitus (DM) requires further study. Described here is the rationale behind a phase-IIIb study designed to characterize the efficacy and safety of alirocumab in insulin-treated patients with type 1 (T1) or type 2 (T2) DM with hypercholesterolaemia and high cardiovascular (CV) risk.

METHODS

ODYSSEY DM-INSULIN (NCT02585778) is a randomized, double-blind, placebo-controlled, multicentre study that planned to enrol around 400 T2 and up to 100 T1 insulin-treated DM patients. Participants had low-density lipoprotein cholesterol (LDL-C) levels at screening≥70mg/dL (1.81mmol/L) with stable maximum tolerated statin therapy or were statin-intolerant, and taking (or not) other lipid-lowering therapy; they also had established CV disease or at least one additional CV risk factor. Eligible patients were randomized 2:1 to 24weeks of alirocumab 75mg every 2weeks (Q2W) or a placebo. Alirocumab-treated patients with LDL-C≥70mg/dL at week 8 underwent a blinded dose increase to 150mg Q2W at week 12. Primary endpoints were the difference between treatment arms in percentage change of calculated LDL-C from baseline to week 24, and alirocumab safety.

RESULTS

This is an ongoing clinical trial, with 76 T1 and 441 T2 DM patients enrolled; results are expected in mid-2017.

CONCLUSION

The ODYSSEY DM-INSULIN study will provide information on the efficacy and safety of alirocumab in insulin-treated individuals with T1 or T2 DM who are at high CV risk and have hypercholesterolaemia not adequately controlled by the maximum tolerated statin therapy.

Psychometric Evaluation of a Treatment Acceptance Measure for Use in Patients Receiving Treatment via Subcutaneous Injection

BACKGROUND

Alirocumab, a proprotein convertase subtilisin/kexin type 9 inhibitor, significantly reduces low-density lipoprotein cholesterol, but requires subcutaneous injections rather than oral pills. To measure patients' acceptance of this treatment modality, a new patient-reported outcome, the Injection-Treatment Acceptance Questionnaire (I-TAQ), was developed.

OBJECTIVES

To psychometrically evaluate the I-TAQ with patients at high risk of cardiovascular events receiving alirocumab.

METHODS

The 22-item, 5-domain I-TAQ was administered cross-sectionally to 151 patients enrolled in alirocumab clinical trials. Item response distributions, factor and multitrait analyses, interitem correlations, correlations with an existing measure of acceptance (convergent validity), and comparison of known-groups were performed to assess the I-TAQ's psychometric properties.

RESULTS

Completion rates were high, with no patients missing more than two items and 91.4% missing no data. All items displayed high ceiling effects (>30%) because of high treatment acceptance. Factor analysis supported the a priori hypothesized item-domain structure with good fit indices (root mean square error approximation = 0.070; comparative fit index = 0.988) and high factor loadings. All items demonstrated item convergent validity (item-scale correlation ≥0.40), except for the side effects domain, which was limited by small numbers (n = 46). Almost all items correlated most highly with the domain to which they were assigned (item discriminant validity). Internal reliability was acceptable for all domains (Cronbach α range 0.72-0.88) and convergent validity was supported by a logical pattern of correlations with the Chronic Treatment Acceptance Questionnaire.

CONCLUSIONS

These findings provide initial evidence of validity and reliability for the I-TAQ in patients treated with subcutaneous alirocumab. The I-TAQ could prove to be a valuable patient-reported outcome for therapies requiring subcutaneous injection.