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Fig. 1 | The Journal of Headache and Pain

Fig. 1

From: Migraine treatment and healthcare costs: retrospective analysis of the China Health Insurance Research Association (CHIRA) database

Fig. 1

Patient selection. aMigraine diagnosis by ICD-10 code (ICD-10 G43.0, G43.1, G43.2, G43.3, G43.8, G43.9) supplemented by physician Chinese characters descriptions. bPatients with a migraine-related outpatient visit in January 2016 or January 2017 and with ≥11 months of follow-up were included in the outpatient cost analysis. CHIRA: China Health Insurance Research Association; ICD: International Statistical Classification of Diseases and Related Health Problems

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