Asthma treatment preference study : a conjoint analysis of preferred drug treatments

• OBJECTIVE: Assessment of patient preferences for attributes of asthma treatments. METHODS: Two hundred ninety-eight patients (age range, 18 to 60 years) from 15 centers in Sweden completed a questionnaire concerning their asthma, and ranked 18 alternative treatments using conjoint analysis. Patients were receiving treatment with either inhaled corticosteroids (ICS) and short-acting bronchodilator (n = 123) or ICS and long-acting bronchodilator (separate inhalers, n = 87; combination inhaler, n = 88). Attributes analyzed were maintenance treatment, additional reliever, time to onset and duration of reliever, number of symptom-free days (SFDs) per month, and out-of-pocket cost per month. RESULTS: Conjoint analysis showed that the most important aspect of treatment was SFD. Forty percent of the patients had CONCLUSION: SFDs were the most important attribute in asthma treatment. Patients were willing to pay for a switch to their preferred treatment. The most favored treatments were a reliever therapy that is both rapid and long acting and a combination inhaler for both maintenance and as-needed use.

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