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. 2017 Mar 10;12(3):e0173346. doi: 10.1371/journal.pone.0173346

Table 4. Determinants of the performance of national health systems.

Independent Variables Model 1 Model 2 Model 3 Model 4 Model 5
Log of GNI per capita (PPP) 0.790*** 0.733*** 0.906*** 0.939*** 0.922***
Square of log of GNI per capita -0.038*** -0.037*** -0.048*** -0.051*** -0.050***
Urbanization (%) 0.005*** 0.003* 0.004* 0.004**
HIV prevalence (%) -0.059*** -0.059*** -0.059***
Share of social security expenditure among total health spending (%) 0.019*** 0.019***
Share of government health spending among total government budget (%) -0.017*** -0.017***
Rule of law 0.044**
Constant -4.300*** -4.179*** -4.567*** -4.676*** -4.585***

Notation: GNI denotes gross national income; PPP denotes purchasing power parity. Statistical significance is indicated by

* (p<0.05)

** (p<0.01) and

***(p<0.001)