An empirical study of the impact of generic drug competition on drug market prices in China.

Subgroup analysis of different therapeutic areas Since our data cover a relatively scattered therapeutic area (52 pharmacological classifications) with a small proportion of drugs in a single therapeutic area and most therapeutic areas have only one or two drugs, most of them may not be significant if subgroup analysis of different therapeutic areas is performed, therefore, we performed separate subgroup analysis with two therapeutic areas that have more drugs, the other antineoplastic agents (10, 9.9%) and antithrombotic agents (8, 7.92%) were analyzed in separate subgroups ( Figure 3 ).

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