... trap”. The inequity in health care expenditure was shown by the gap in the ratio of health expenses to household income between rich and poor households in this study. More efforts for equity and ... Key words: health expenditure, health insurance, inpatient, outpatient, basis health level, inequity, hospital fee, out of pocket, ability to pay. 1. Introduction Vietnam is classified as ... poor who do not receive any support will incur a financial burden through illness. To achieve equity in health care, the Vietnamese government is always interested in providing health care services...