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Table 2 Number of comments given by participants of the NutriAct-Family study (NFS) in the open field at the end of each of the four web-based questionnaires

From: The NutriAct Family Study: a web-based prospective study on the epidemiological, psychological and sociological basis of food choice

  N Questionnaire 1 Questionnaire 2 Questionnaire 3 Questionnaire 4
Number of participants who wrote a comment 246 166 54 23 3
Number of categorized comments 430 146 134 83 67
Categories: N % % % %
Questionnaires, questions, response models or method
 Additional information 63 36 48 14 2
 Technical or operation issues 35 34 9 17 40
 Complains (e.g. about burden) 41 22 7 27 44
 Issues of recruitment procedures 5 40 20 0 40
Conditions of living or health
 Health status 74 18 72 5 5
 Implications due to conditions of family members 8 25 75 0 0
 Mental aspects 21 0 48 43 9
 Crucial working conditions 14 43 36 21 0
Dietary habits
 Specific diet 22 36 32 18 14
 Use of specific products 40 96 0 2 2
 Values regarding nutrition 31 26 3 68 3
 Avoidance of certain food 10 80 0 0 20
Other comments
 Wish of return of results 6 50 0 0 50
 “No comment” 6 33 33 17 17
 Positive reflection on participation 6 50 17 0 33
 Philosophy or history of life 26 15 43 23 19
 Humorous reflections 22 23 5 36 36