(i) Missing data : If scale items for WAI were not complete then we prorated the scores as long as more than 80% of items had been completed.
Once all 20 items have been completed, the PHO Risk Screening Tool generates a risk score and provides a suggested level of ethics review.
The higher measurement error of the dimension variability compared to the dimensions severity and impact, was also reflected in the fact that the item selection always started with two variability items after the respective random start items had been completed.
The function interference index is scored as the mean of the items scores multiplied by seven, given that more than 50%, or four of seven, of the items have been completed [ 26].
In accordance with the guidelines missing items in the STAI and PCQ scales were imputed by participants' own average score if at least 50% of these items had been completed (Ware et al, 1993).
Substitution of missing values was made with the mean of each patient's responses, provided that at least half of the subscale items had been completed (Fayers et al, 2001).
The tool features an easy to use checklist format that generates a risk score (0 3) associated with a suggested level of ethics review once all items have been completed.
For example, after 10 items have been completed, curtailment never stops to produce a "screened out" result (as denoted "N/A" in Table 2 to indicate "Not Applicable"), but it stops to produce a "screened in" result if the respondent's score is ≥ 9 at that stage.
In September 2006, the study item of the LTE has been completed and the corresponding work item was scheduled to be finalized within about one and a half years, that is the second half of 2007, so that the subsequent initial deployment can be possible in the year of 2009 or 2010.
The thoughts behind it is - give away a product, trial or sample for free, and it may increase the amount of customers for that item after the sample or trial has been completed.
