Patients who achieve 100% clearance, or Psoriasis Area and Severity Index (PASI) 100, are more likely to have improved quality of life scores and a reduction in the signs and symptoms of psoriasis.3 However, a recent study showed that only 39% of physicians and patients agree regarding their level of satisfaction with psoriasis control using current treatment methods.4,5 In fact, 51% of physicians were satisfied with the level of treatment control when their patients were not at all satisfied with the level of control they achieved with treatment.4 This finding indicates that although quality of life data provide encouragement for treating to complete clearance, improvements in quality of life or other patient-reported outcomes have traditionally not been enough for a physician to switch biologic treatments for a patient without clear skin unless the patient is also expressing unhappiness with their treatment results and asking for a change. Many patients may not even be aware that higher levels of clearance are now within reach.
Brodalumab-related Benefits for 100% Clearance
One of the biologics that shows promise for achieving total clearance of patients is brodalumab. After 52 weeks and 108 weeks of treatment, more than 2 out of every 3 patients achieved PASI 100 scores (68% and 69%, respectively).3,6 A study by Strober et al pooled data from 3 phase III clinical trials and compared the results for patients who achieved complete clearance (PASI 100) to those who did not (PASI 75) for patient-centered outcomes like the Psoriasis Symptom Index (PSI), an eight-item patient-reported outcome measure developed by Amgen for their product, etanercept, for assessing the severity of plaque psoriasis symptoms and the Dermatology Life Quality Index (DLQI).3,7
For patients taking brodalumab who were at least 75% clear but less than 100% clear, there was a significant improvement (11%) in 100% symptom-free days; however, those who experienced total clearance were 100% symptom-free for 42% of their days (Figure 1A).3 As measured by DLQI, 55% of patients who were at least 75% clear but less than 100% clear rated their DLQI score as a 0 or 1, indicating that psoriasis did not affect their life, compared to 80% of those who were 100% clear (Figure 1B).3 Sixty-eight percent of patients who were at least 75% clear but less than 100% clear were PSI responders (meaning that their PSI total score ≤8 with each symptom rated as either 0 [not at all severe] or 1 [mild]), but for those who were totally clear 88% were responders (Figure 1C).3 In those who were at least 75% clear but less than 100% clear, 13% achieved a PSI = 0 (psoriasis symptoms not at all severe,) while 45% of those who were