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Table 1 List of attributes and levels

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

Attributes

Levels

Variable name used in the model

Pain

My feet are not painful when I walk

My feet are somewhat painful when I walk

My feet are extremely painful when I walk

pain_2

pain_1

Reference

Mobility

(e.g. walking, climbing stairs)

I have no problems with mobility

I have some problems with mobility

I have extreme problems with mobility

mobility_2

mobility_1

Reference

Doing everyday things / activities of daily living

(e.g. work, study, housework, family or leisure activities)

I have no problems with doing everyday activities

I have some problems with doing everyday activities

I have extreme problems with doing everyday activities

daily_activities_2

daily_activities_1 Reference

Fatigue

I usually do not feel tired after walking

I usually feel moderately tired after walking

I usually feel extremely tired after walking

fatigue_2

fatigue_1

Reference

Shoes (choice of footwear)

My walking ability is not affected by the footwear I choose.

My walking ability is moderately affected by the footwear I choose.

My walking ability is greatly affected by the footwear I choose

shoes_2

shoes_1

Reference

Health and fitness – exercise supervised by a physiotherapist or podiatrist

To improve my walking, I will go for one-to-one supervised exercise, twice a week for 6 weeks (1)

To improve my walking, I will go for one-to-one supervised exercise, once a week for 12 weeks (2)

To improve my walking, I will go for supervised exercise as part of a group twice a week for 6 weeks. (3)

To improve my walking, I will go for supervised exercise as part of a group once a week for 12 weeks. (4)

health_fitness_3

health_fitness_2

health_fitness_1

Reference