Dear All
The VAS is a very crude method of measuring anything. Studies regarding
the reliability and Validity of VAS and thus accuracy of the VAS indicate
that this measuring method is 'crude' at best.
A P value of 0.04 suggests that there is a 4% probability that chance is
involved in the treatment, that is they got better of their own accord.
When applying the miniscule changes to the VAS that these patients have
over three month period, one can conclude that they have not improved by
treatment but by time.
Paul Coneely.
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