This gradual growth in information has however assisted to develop knowledge in other fields and areas like stroke nursing and rehabilitation. In this sense the methodologies that were used in developing the classification of these research studies shall be relevant in the examining the PD rehabilitation. The only outstanding case is the underlying potentialities of this classification system in operationalizing practice standards, keeping of the records and further research that encompasses standardizing data collection on interventions and analysis of cost.
In that connection the components have potential of giving guidelines into the future or afterward research, hence in future investigation into the black box of physiotherapy in PD should be encouraged. The methodological level captures the two basic components that involve the trial design and the measurement of the outcome. The interventions that are related to Physiotherapy are multi-factorial and complex and in nature.
This is because the basis for the physiotherapeutic interventions is individual centered in approach to treatment if patients and their specific health problems which are liable to changes and are dynamic. Hence it has proven difficult to achieve developing practical and clinically relevant methodologies. And this is a greater challenge that befalls the researchers who try to examine or investigate the complex interventions. Thus, it calls for the urgent investing in development of appropriate methodologies to curb the challenge of investigating the complexity in the interventions.
So that the results that are obtained should be clinically credible and scientific. However qualitative and quantitative methods are integrated in the new developed frameworks for the design and evaluation of the complex intervention in relation to Parkinson’s disease. Furthermore, these difficulties which are related to methodological difficulties in basic science, has resulted to the formulation of the ITF (International Task Forces) to give recommendations of the PD Trial designs.
Therefore improved collaboration should be encouraged to solve economic and methodological difficulties which currently hamper research in the areas of PD intervention. The outstanding issue in relation to the challenges arising from methodology is achieving the outcomes which are appropriate and scientifically valid. The literature review indicates that there is lack of consensus to a set of outcome measures in evaluating PD interventions.
Therefore this disagreement barricades the aspect of multi-center collaboration in synthesis of results of clinical trials (Peterson, 2006, p. 127) and clinical research. Hence need to address the problem of this disagreement in measuring the outcomes. However it is worth to mention that the challenge is currently being worked on by the rehabilitation research group of the Consortium of PD centers in Northern America today aimed at developing a consensus on the functional tools to be used in measuring the outcomes.