This study has sufficient
power because of the low dropout rate and a standard deviation
around the mean SPADI score below the standard deviation
used for power calculation. In addition to a sound statistical
analysis controlling for possible confounders, covariates and
time, further data about additional medication, diagnostics,
co-interventions and sick leave are given, enabling the reader
to draw a comprehensive picture of the patient group. Both
interventions are described in detail and can therefore be
reproduced easily