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Taiwan is remarkable in that it is one of a very few countries where a central computerized data repository is available for almost 100 of the population across all medical services, ages and geographic areas 25, 26 which made this study possible. However, for other nations without such data, it would be necessary to implement comprehensive cross-sectional risk adjustment.
First, continuous enrollment was required so that results could not be generalized to those without continuous enrollment. Secondly, diagnosis information from claims data was used so that the completeness of claims data might affect the findings; in addition, pharmacy data was available and could be incorporated for future research.