This research developed an experimental study. (Experimental Development Research) group is the insulin pen and vial type b that during 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 and analyzes the causes and factors associated with insulin reduces costs. Statistics and Pearson correlation coefficients (Pearson 's Product Moment Correlation Coefficient).
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