Assessing healthcare efficiency and determinants in China: the perspective of provincial-level social health expenditure

Table 6 The estimated results of the robustness test

Relative variables	β	standard error	t-value	p-value	[95% Confidence Interval]
Relative variables	β	standard error	t-value	p-value	Lower	Upper
Per capita GDP	2.47E- 07	4.25E- 07	0.58	0.561	− 5.86E- 07	1.08E- 06
Education level	1.09E- 08	1.22E- 08	0.89	0.371	− 1.30E- 08	3.48E- 08
Urbanization rate	0.0117442	0.0016156	7.27	0.000	0.0085777	0.0149107^***
Population density	− 0.0003241	0.0000817	− 3.97	0.000	− 0.0004842	− 0.0001639^***
Constant	0.1824071	0.1200836	1.52	0.129	− 0.0529525	0.4177666
sigma_u	0.3091137	0.0477047	6.48	0.000	0.2156141	0.4026133^***
sigma_e	0.0588427	0.0031121	18.91	0.000	0.052743	0.0649424^***

ISSN: 1472-6963