Correlation. The scores on day 1 of the 15 reliability subjects
were added to the scores of 14 other individuals with
unilateral PFPS who had completed the VAS and 5 functional
tests. This information was used to establish a relationship
between the VAS and functional test scores. All subjects
scored within this range except for 2. Both subjects were asked
to return within 48 hours and repeat the VAS. Upon return, 1
of the 2 subjects scored within the acceptable VAS range; the
other did not and was dropped from the study.
Limb Symmetry Index. The PFPS limb scores were compared
and an LSI was established.11 The group of 11 subjects
with normal knees also performed the 5 functional tests to
determine the LSI.