Methodology of this research is to develop an experimental research study. (Experimental Development Research) samples were insulin pen cost and expense types vial. From fiscal year 2550 to the second quarter of fiscal year 2557 (October 1, 2556 to March 31, 2557) and analyzed by a computer program. Show results with descriptive statistics including frequency distribution, percentage, ratio and proportion, correlation analysis of causes and factors that affect the cost reduction of insulin. Statistics Pearson correlation coefficients (Pearson 's Product Moment Correlation Coefficient).
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