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Table 1 Attributes and levels

From: Patient preferences on rheumatoid arthritis second-line treatment: a discrete choice experiment of Swedish patients

Attribute

Level 1

Level 2

Level 3

Route of administration

Tablet

Injection

Drip

Frequency of use

Daily

Weekly

Monthly

Probability of mild short-term side effects (nausea, vomiting or headache)

Common 1 in 10

Uncommon 1 in 100

Rare 1 in 1000

Probability of side effects changing appearance (hair loss, weight changes or skin rash)

Common 1 in 10

Uncommon 1 in 100

Rare 1 in 1000

Probability of psychological side effects (anxiety, mood changes, depression or sleep disturbance)

Common 1 in 10

Uncommon 1 in 100

Rare 1 in 1000

Probability of severe side effects that requires hospitalisation such as severe infections or allergic reactions

Common 1 in 10

Uncommon 1 in 100

Rare 1 in 1000

Effectiveness (the ability to decrease inflammation and swelling of the joints, also pain and other symptoms)

30% improvement. So out of 100 persons taking the treatment, 30 will get enough improvement; the rest will get a small or no improvement

50% improvement. So out of 100 persons taking the treatment, 50 will get enough improvement; the rest will get a small or no improvement

70% improvement. So out of 100 persons taking the treatment, 70 will get enough improvement; the rest will get a small or no improvement