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Table 5 Hierarchical importance of attributes based on partial log-likelihood analysis

From: Identifying the primary outcome for a randomised controlled trial in rheumatoid arthritis: the role of a discrete choice experiment

Conditional logit model Mixed logit model
Attribute level excluded from the analysis
(by order of impact)
Log likelihood Partial effect- change in log likelihood Relative effect - %sum of change in log likelihood Attribute level excluded from the analysis
(by order of impact)
Log likelihood Partial effect-change in log likelihood Relative effect -%sum of change in log-likelihood
None −1193.335    None −1133.406   
Pain_2 −1213.810 −20.475 0.276 Pain_2 −1190.501 −57.095 0.264
Pain_1 −1209.571 −16.236 0.219 Mobility_2 −1167.962 −34.556 0.160
Mobility_1 −1206.337 −13.002 0.175 DActivities_2 −1157.175 −23.769 0.110
DActivities_2 −1201.174 −7.839 0.106 Pain_1 −1156.766 −23.360 0.108
DActivities_1 −1197.358 −4.023 0.054 Mobility_1 −1155.712 −22.306 0.103
Fatigue_1 −1196.652 −3.317 0.045 DActivities_1 −1146.207 −12.801 0.059
Mobility_2 −1196.297 −2.962 0.040 Fatigue_1 −1144.621 −11.215 0.052
Shoes_1 −1196.081 −2.746 0.037 Shoes_1 −1144.179 −10.773 0.050
HF_3 −1194.546 −1.211 0.016 Shoes_2 −1142.456 −9.050 0.042
HF_2 −1194.473 −1.138 0.015 HF_1 −1138.126 −4.720 0.022
Shoes_2 −1194.413 −1.078 0.015 Fatigue_2 −1137.004 −3.598 0.017
Fatigue_2 −1193.553 −0.218 0.003 HF_2 −1135.117 −1.711 0.008
HF_1 −1193.386 −0.051 0.001 HF_3 −1134.987 −1.581 0.007
  1. Notes:
  2. _1 refer to “moderate” states
  3. _2 refer to “perfect” or “no problems” states
  4. Coefficients calculated based on the “extremely bad” state being the baseline
  5. HF_1: ‘To improve my walking, I will go for supervised exercise as part of a group twice a week for 6 weeks’
  6. HF_2: ‘To improve my walking, I will go for one-to-one supervised exercise, once a week for 12 weeks’
  7. HF_3: ‘To improve my walking, I will go for one-to-one supervised exercise, twice a week for 6 weeks’;
  8. Baseline is: ‘To improve my walking, I will go for supervised exercise as part of a group once a week for 12 weeks’
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