This essay has a double aim. On the one hand, to identify what are the determinants in the inequality in health. On the other hand, to estimate to what extent the inequality indicator used is important. To do this, we use a cross-sectional model for 176 countries. The achieved results allow concluding that the choice of the inequality measurement is a key element in this type of studies. Also, inequality in income distribution, the weight of the rural population and capitalism make inequality in health increase.