To examine the effectiveness of the program, the treatment
success was also determined. After treatment (at T2), only
three children of the IG fulfilled the diagnostic criteria for
CAP (according to the Rome-III-Criteria; see Table 1) compared
to 14 children of the WLC. The success rate for the IG
was 90.6, as opposed to 9.4 for the WLC, resulting in a
treatment advantage of 81.2% for the IG. Thus, each child of
the WLC increases its chances of having no abdominal pain
by 81.2% by participating in the training. Additionally the
NNT was calculated: 1.25 children needed to receive the
treatment in order that one of them benefits from the intervention
(0 diagnostic criteria of CAP were no longer fulfilled).