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Although using different validated PA questionnaires may have been more sensitive to detect differences between exercisers and non-exercisers, based on the very small differences between our groups, it appears more likely that these outcome variables simply do not differ between these groups.
It is, however, possible that the administration of additional caregiver-reported measures would have presented an excessive burden to parents or caregivers of seriously ill children, and more questionnaires may have affected the response rate and increased missing data.
Clinicians and other prison personnel completing questionnaires may have been biased by their awareness of outcome, and this may have affected, in particular, their reporting of estimates of risk at last contact.
Notably, the 128 patients who failed to return questionnaires may have also declined clinical trial entry.
The burden of completing multiple questionnaires may have limited our rate of compliance at one year.
30 Secondly, the use of retrospective questionnaires may have reduced the reliability of the data.
Similar(25)
The questionnaire may have the effect of keeping the jury effectively anonymous.
Thus, our questionnaire may have benefited from additional validation tests but we have deliberately eliminated validation against direct interview to avoid patient-to-doctor-bias.
The SpREUK questionnaire may have important strengths.
The context in the questionnaire may have affected the statistics.
Some studies suggest that the timing of administering the questionnaire may have an influence on satisfaction.
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