Background: Psoriasis is a chronic condition with negative impact on patients' quality of life that most often requires lifelong effective and safe treatment. Objective: This analysis focused on the effect of secukinumab treatment on patient-reported health-related quality of life as assessed by the Dermatology Life Quality Index (DLQI) in patients with moderate to severe psoriasis. Methods: The proportion of subjects achieving DLQI score 0/1 response at week 24, time to DLQI score 0/1 response, and sustained DLQI score 0/1 response up to week 52 were compared between secukinumab and etanercept. Results: Of 1470 subjects, 1144 received secukinumab and 326 received etanercept. DLQI score 0/1 response rates were significantly higher for secukinumab than for etanercept at week 24. The median time to DLQI score 0/1 response was significantly shorter for secukinumab versus etanercept (12 vs 24 weeks; P < .01). The majority of secukinumab-treated subjects achieved DLQI score 0/1 response at week 24 and sustained it through week 52 along with a 90% to 100% reduction in the Psoriasis Area and Severity Index total score response. Limitations: Placebo comparisons are limited during the maintenance period because of rerandomization at week 12. Conclusion: Secukinumab treatment provided faster and greater sustained improvements in quality of life than etanercept over 52 weeks, consistent with greater clinical response.