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Table 4 Discrete choice experiment results

From: Patient preferences for adherence to treatment for osteoarthritis: the MEdication Decisions in Osteoarthritis Study (MEDOS)

Factor ORa(95% CI) RIa WTAa(95%CI) ($AUD)
Pain Efficacy b (decreasing) 1.00 (0.97-1.04) N/Aa 0.08 (0.04-0.11)
Mode of action c (Slow OA a ) 1.17 (1.09-1.25)* 5 13.83 (13.73-13.93)
Dose frequency b (once/day) 1.02 (0.96-1.08)   0.58 (0.42-0.75)
Treatment Schedule c (daily) 0.90 (0.89-0.9)* 4 4.11 (3.92-4.29)
Cost b (increasing) 0.97 (0.97-0.98)* 2 N/Aa
Prescription b (Yes) 1.03 (0.97-1.09) N/A a 1.00 (0.83-1.16)
Side effects
Drowsy/constipatedc 1.55 (1.48-1.62)* 6 18.06 (17.90-18.23)
Heartburn/reflux, stomach ulcersc 0.76 (0.75-0.78)* 3 10.67 (10.55-10.78)
High blood pressure, heart/kidney/liver problemsc 0.09 (0.08-0.11)* 1 90.50 (89.38-91.62)
Constant b (α) N/Aa N/Aa  
Model Fit Statistics Log Likelihood −1271 McFaddens ρ2 adjusted 0.37 AICa 0.869
  1. *P < 0.001.
  2. a: OR Odds Ratio, RI Relative Importance, WTA Willingness to Accept, OA Osteoarthritis, N/A not applicable, AIC Akaike’s Information Criterion.
  3. b: Non-random parameter c: Random parameter.