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We note that variations within utility elicitation methods also exist regarding the exclusion criteria used for valid responses or the valuation of health states worse than 'dead'dead
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The totals used for the analysis were the number of valid responses for each question.
The A-O scale score will be calculated as the sum of valid responses for individual items divided by the number of valid responses.
The D-T scale score will be calculated as the sum of valid responses for individual items divided by the number of valid responses.
** There are a number of valid responses to these arguments.
§ n = number of valid responses.
^Percentage calculated from valid responses.
In order to collect the primary data a questionnaire has been designed for which 104 valid responses (8.5% response rate) have been obtained.
These analyses are consistent with the FDA guidelines recommending validation testing for children and adolescents within fairly narrow age groupings and the determination of the lower age limit for reliable and valid responses [ 4].
Mean scores were calculated for each scale (reversed item scores were corrected before mean scale score calculation; for each scale valid responses were required to a minimum of 80%% of items to calculate a mean score).
For participants with valid responses (10) to a dietary questionnaire (n = 13,690; 75% of study population), we additionally adjusted for alcohol, fruit, vegetable, and red meat intakes and use of a multivitamin.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com