Cost-utility Analysis of Supported Self-management with Motiva-tional Interviewing for Patients with Psoriasis

Acta Derm Venereol. 2016 Jun 15;96(5):664-8. doi: 10.2340/00015555-2331.


There are few studies evaluating the cost-effectiveness of self-management interventions for patients with psoriasis. Motivational interviewing (MI) as a telephone follow-up after climate-heliotherapy was effective on several clinical parameters, but its cost-effectiveness is unknown. A cost-utility analysis was conducted alongside a randomized controlled trial (RCT) comparing MI with usual care. A total of 169 Norwegian patients were included. A within-trial analysis compared the costs and quality-adjusted life years (QALYs). Utilities were measured with the 15D instrument, supplemented with Dermatological Life Quality Index (DLQI). A time-integrated summary score defined the clinical effects. QALYs were adjusted for baseline differences. MI provided equivalent quality of life and utility (15D: -0.0022 QALYs (95% Cl -0.02, 0.01), p = 0.77, and DLQI: -0.62 QALYs (95%CI -0.65, 0.41), p = 0.24, at lower costs €-1103 (-2293, 87), p = 0.058, compared with treatment-as-usual. The MI intervention was thus cost-effective. This result was more evident when using the DLQI as outcome measure compared with 15D.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Cost-Benefit Analysis*
  • Female
  • Heliotherapy / economics*
  • Humans
  • Male
  • Middle Aged
  • Motivational Interviewing / economics*
  • Norway
  • Psoriasis / therapy*
  • Quality of Life
  • Quality-Adjusted Life Years
  • Self Care / economics*
  • Treatment Outcome