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Table 8 Examples of items and agreement rates in patient rating phase

From: Development of a disease-specific quality of life questionnaire for adult patients with hereditary angioedema due to C1 inhibitor deficiency (HAE-QoL): Spanish multi-centre research project

Item no.

Subscale

Example (*)

A (%)

B (%)

Final Decision

33

General Health

To what extent have you been prevented from using other treatments (ACE antihypertensives, oral contraception, …) due to HAE?

75%

100%

Modified (QC also taken into account)

41

Mental Health

To what extent have you felt at ease after obtaining the HAE diagnosis?

87.5%

93.75%

Removed based on QC

23

Physical Role

How often have you missed work or school/classes because of an angioedema attack?

100%

100%

Maintained

26

Aesthetics

To what extent have you been affected by the impact of secondary adverse events of attenuated androgens treatment in your physical appearance?

68.75%

100%

Modified

6

Health Conditions

To what extent have you been affected by the need to get to a health care center to receive medication for acute attacks?

81.25%

93.75%

Modified based on QC

17

Social Role

To what extent has this disease affected you in terms of taking trips or traveling?

100%

100%

Maintained

  1. A: Clarity and adequate wording – item was revised if agreement rate was below 80% or by consensus in qualitative comments. B: Relevant for HAE-C1-INH - item was removed if agreement rate was below 80%.