Table 6: Intra-rater reliability of the CDI for LBP and no LBP groups.

  Rater 1 Rater 2
No LBP* LP Combined No LBP* LBP* Combined
Flexion 0.40 0.64 0.56 0.61 0.50 0.59
Extension 0.46 0.67 0.59 -0.08 0.41 0.16

LBP = Low back pain.