The Voice Handicap Index-10 (VHI-10) and Vocal Performance Questionnaire (VPQ) are brief self-reported assessments of voice pathology, apparently useful in the general voice clinic population.
The remaining 35 items were then analysed in terms of their frequency distributions on the performance questionnaire.
Secondary information regarding literacy and numeracy, academic performance, grade repetition, and integration assistance will be sought from parents and teachers through an academic performance questionnaire.
The mother was asked about the cooperation of the child's father in childcare using four items from the husband's family role performance questionnaire developed by Hong [ 45] that were extracted by a previous study [ 46].
The participants' level of presenteeism will be measured using the "World Health Organization – Work Performance Questionnaire" as well as the "Productivity and Disease Questionnaire", and valued using age- and gender-specific price weights [ 40, 43– 43].
We will also measure physical performance with a number of tests, including a 3 min walk, chair rises and standing balance, as well as with a physical performance questionnaire.
