Contacted persons were compared to responders with Wilson signed rank and chi-square tests for age and gender categories.
Stage was more advanced among the non-responders compared to responders, with 84.
Nonresponders were similar to responders with respect to age, sex, and race/ethnicity.
Nonresponders were similar to responders with regard to age, gender, and severity of head injury.
Many studies conclude that non-responders in surveys and other epidemiological studies can differ to responders with respect to a range of specific health, lifestyle and social variables.
Not-responders patients showed a low baseline VEGF levels respect to responder ones in contrast with Briasuolis et al. [ 8].
Three spots were found to be more abundant in clinical responders to IFNβ as compared to non-responders with a fold difference of at least 1.5 at the p<0.05 level of significance (Figure 3) (Table 3).
Two weeks after the initial mailing, a reminder card was sent to non-responders with the request to complete the form.
Furthermore, because of the anonymity of the data from specialists participating in the project, we were not able to compare responders with non-responders to see if the group of responders was a representative sample with respect to mean ratings.
Up to three reminders were sent at 7 day intervals to non-responders, with the final reminder containing a request for participants to tell us their past week alcohol consumption only.
