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Table 4 Changes in the prices and sales for drugs of different price levels (2009–2010)

From: Effects of the National Essential Medicine System in reducing drug prices: an empirical study in four Chinese provinces

2010 price (in Chinese yuan) N Changes in the prices (%) Changes in the sales (%) p-value
0- 4189 −51.8 0 <0.01
2- 4420 −32.4 0.1  
10- 1404 −23.6 15.6  
20- 975 −16.3 20.5  
  1. Note: United States dollar = 6.8 Chinese yuan.
  2. p value refers to Pearson correlation test for significant or nonsignificant variations in relationships between price levels and increased sales.