of the study design as in evidence-based medicine
(e.g. power calculation prior to study, inclusion of
comparable intervention and control groups), 12 are
used to assess quality of intervention as in best practice
and quality assurance (e.g. participation of the
intended population, empowerment) and the other
48 are descriptive or of informational import. For
each item in the catalogue between 0 and 1 point is
given to the study, following a defined procedure.
The maximum score for the quality of the study
design depends on its type, being 7 points for
RCTs, 6 points for CTs and 5 points for non-CTs.
According to the criteria catalogue, using the results
of the quality assessment in combination with the
assessment of effects done by the study authors, the
studies can be separated in four groups regarding
recommendation for implementation. High recommendation
corresponds to studies with ratings
>80% in both quality of the study and intervention
quality; strong recommendation if the studies obtain
ratings >60% in both quality of study and intervention
quality; weak recommendation for studies with
ratings above average in each field; or no recommendation
possible. As the average score for studies
included in the present review was high (64% for
quality of the intervention and 73% for quality of
study design), it was decided to locate the limit
for weak recommendation at 50% for study and
intervention quality.
of the study design as in evidence-based medicine
(e.g. power calculation prior to study, inclusion of
comparable intervention and control groups), 12 are
used to assess quality of intervention as in best practice
and quality assurance (e.g. participation of the
intended population, empowerment) and the other
48 are descriptive or of informational import. For
each item in the catalogue between 0 and 1 point is
given to the study, following a defined procedure.
The maximum score for the quality of the study
design depends on its type, being 7 points for
RCTs, 6 points for CTs and 5 points for non-CTs.
According to the criteria catalogue, using the results
of the quality assessment in combination with the
assessment of effects done by the study authors, the
studies can be separated in four groups regarding
recommendation for implementation. High recommendation
corresponds to studies with ratings
>80% in both quality of the study and intervention
quality; strong recommendation if the studies obtain
ratings >60% in both quality of study and intervention
quality; weak recommendation for studies with
ratings above average in each field; or no recommendation
possible. As the average score for studies
included in the present review was high (64% for
quality of the intervention and 73% for quality of
study design), it was decided to locate the limit
for weak recommendation at 50% for study and
intervention quality.
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