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Table 2 Characteristics of the sample of subjects involved in the pre-test phase

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

   Sex Total
   Male Female
Education High school or degree Middle school High school or degree Middle school
Age <19 1 1 2 1 5
  19–60 3 4 4 3 14
  >60 2 1 2 2 7
Total 6 6 8 6 26