Effectiveness analysis
SPADI score. Both groups showed a significant improvement
in SPADI score over the follow-up period. However, our mixed
models analysis showed that group allocation, and therefore
the IMPT, had no influence on these results ( p = 0.38).
While the intervention group showed no further improvement
during the final follow-up period, a remarkable improvement
was seen in the control group in total SPADI score.
This development is difficult to explain. We can hypothesize
that patients from the control group may have established a
clearer association between exercising and improvement in
complaints, and therefore a stronger belief in the effectiveness
of their exercises. They may have then restarted their exercises
more quickly when complaints recurred.