Cultural and linguistic validation of the NHQ-2 Questionnaire: a specific instrument for assessing patient’s usability of inhalation devices

摘要

BackgroundAn increasing number of inhalation devices are presently available in the market. They are differently characterized in terms of their handling and usability, both factors which may affect the outcomes of respiratory treatment.The assessment of the preference and the usability rate of all devices can be carried out by means of specific questionnaires. Before their use, the identification of errors due to the incorrect wording of questions included in the questionnaires, together with the trans-cultural reliability represents the main issues of their cultural and linguistic validation.