Additional file 1 Appendix Table 1 Sample characteristics. Appendix Table 2 Impact of health insurance and health workforce on healthcare use with interaction terms of year before and after China’s health system reform. Appendix Table 3 Impact of health insurance and health workforce on choice of healthcare providers with interaction terms of year before and after China’s health system reform. Appendix Table 4 Impact of health insurance and health workforce on healthcare use before and after China’s health system reform. Appendix Table 5 Impact of health insurance and health workforce on choice of healthcare providers among outpatient care before and after China’s health system reform. Appendix Table 6 Impact of health insurance and health workforce on choice of healthcare providers among inpatient care before and after China’s health system reform