Article

This study evaluated inter- and intra-observer reliability and discriminative
validity of three movement control tests: 1) standing knee-lift test; 2) static
lunge test; and 3) dynamic lunge test. Thirty-eight subjects, 21 with low-back
pain and 17 healthy, were video-recorded while performing the tests. Four
physical therapists scored the tests according to a standardized protocol and
calculated a composite score for each test based on the number of incorrect test
components. Inter-observer reliability for the composite scores ranged between
0.68 and 0.80 (ICC 2,k) and intra-observer reliability between 0.54 and0.82 (ICC
2,1). The separate test components ranged between 0.32 and 0.91 (kappafree) for
inter-observer reliability and 0.42 and1.00 for intra-observer reliability. Test
components showing the highest values were: back extension; arm lowering; and
shoulders moving backwards. Components hip hitch, trunk lateral flexion, knee not
lifted straight up and hips moving backwards did not reach accepted thresholds.
Discriminative validity ranged between 0.47 and 0.56 (AUC). As our results showed
an overall good agreement for the composite, scores and for the majority of the
included test components the tests can be considered reliable enough. As the
tests' discriminative ability was close to "none", they should, however, not be
used for diagnostic purposes but should be further evaluated toward predicted
validity.

Langue : ANGLAIS