Sustainability: Determine to what extent project interventions can be maintained after the completion of the project.
The beneficial effects of these behavioural interventions can be maintained long after counseling is stopped [ 4, 5].
The maintenance programmes of the DPS and DPP have indicated that effects of diabetes prevention interventions can be maintained [ 18, 74], but the development of these programmes is not fully described in literature [ 75].
As long as integrity to the key elements of the intervention protocol can be maintained, such adaptations can only enhance the value of the intervention in the eyes of policymakers, communities and individuals - in both donor and recipient countries.
It remains uncertain whether treatment levels can be maintained in patients who had received the intervention following discharge back to usual care.
If, however, the exchange rates are stabilized or set arbitrarily (as by the Bretton Woods Conference of 1944) or are set within a narrow range, the par rates can be maintained by intervention of national governments or international agencies (e.g., the International Monetary Fund).
Finally, it is unclear whether the short-term effect of the intervention on adiposity and blood pressure can be maintained over time because no follow-up tests were conducted.
Some issues that cannot be satisfactorily investigated other than in the context of a randomized trial are the percentage consenting to randomization, retention in intervention and control groups, whether blinding can be maintained, and whether all components of the protocol work together.
The issue is not whether weight loss works to prevent IGT progression to type 2 diabetes, but whether weight loss can be maintained without an intervention program that most individuals find difficult to follow and that is costly to implement and maintain.
Finally, there is limited information regarding whether improvement in gait speed can be maintained after exercise interventions had ended, because of limited long term data on maintenance of gait speed from randomized controlled trials and reviews [ 12, 13].
