Usability of the Certolizumab Pegol Auto-Injection Device in Australian Patients with Chronic Rheumatic Diseases:...

To determine the usability of the ergonomically designed certolizumab pegol pre-filled pen (CZP PFP) in Australian patients with active ankylosing spondylitis, active psoriatic arthritis or moderate-to-severe rheumatoid arthritis.

CZP-naive patients were recruited from six clinical centers in Australia between November 2018 and May 2019. Patients and healthcare professionals (HCPs) reviewed training materials and completed pre-injection surveys; patients then self-administered ≥1 injection with the CZP PFP during each of three visits. Patients and HCPs then completed post-injection surveys. Some survey questions were adapted from the self-injection assessment questionnaire (SIAQ_v2.0).

Seventy patients participated (65 completed 3 visits); 33 were biologic-experienced. All patients agreed that training materials were informative; 94% found them easy to understand. Pre-injection, 89% of patients reported little or no anxiety about having injections; 67% (79% in biologic-experienced) were very confident about self-injecting the correct dose with the PFP. Ninety percent of patients were satisfied/very satisfied with their first experience with the CZP PFP; those with pre-injection anxiety reported lower satisfaction (43% vs 79% "very satisfied"). Confidence and satisfaction increased as visits progressed (for Visit 3 vs Visit 2: 69% vs 56% "very convenient"; 75% vs 67% "very confident"; 71% vs 57% "very satisfied"). All HCPs were confident in their patients' competence to self-inject and thought all patients had overall positive experiences.

Australian patients with chronic rheumatic disease reported high levels of confidence and satisfaction following initial use of the CZP PFP. The availability of devices with patient-centered design innovations may help overcome barriers to self-injection for improved adherence/outcomes.