Fig. 5From: Impact of China’s zero mark-up drug policy on drug cost of NCDs’ outpatients: an interrupted time series analysisEstimated changes in average drug costs for patients of different ages with diabetes (a), hypertension (b), and coronary heart disease (c). On the left is the under-45 group, in the middle is the 45–65 group, and on the right is the over-65 groupBack to article page