The societal impact of a biologic treatment of ankylosing spondylitis: a case study based on secukinumab

Aim: This study estimates the societal benefits of using biologics like secukinumab (SEC) instead of nonsteroidal anti-inflammatory drugs for treating patients with ankylosing spondylitis in Germany. Materials & methods: A Markov and a population model were used to predict the functional impairment of German ankylosing spondylitis patients using SEC or nonsteroidal anti-inflammatory drugs. This was translated into avoided productivity losses, which were valued according to gross value added. Results: The productivity impairment of SEC users was predicted to decrease by 20 percentage points, corresponding to 12.8 and 32.7 million hours in paid and unpaid work and a monetary value of €1.6 billion from 2016 to 2030. Accounting for economic spillover effects increases the societal value to € 3.3 billion. Conclusion: The improvements in functional impairment due to biologics could lead to sizable productivity effects.