Table 5.

Correlation matrix.

Models	T_CRS	x1_CRS	x2_CRS	x3_CRS	T_VRS	x1_VRS	x2_VRS	x3_VRS
T_CRS	1
x1_CRS	0.858 **	1
x2_CRS	0.868 **	0.743 **	1
x3_CRS	0.909 **	0.831 **	0.735 **	1
T_VRS	0.720 **	0.667 **	0.724 **	0.555 **	1
x1_VRS	0.573 **	0.712 **	0.588 **	0.457 **	0.878 **	1
x2_VRS	0.597 **	0.567 **	0.766 **	0.415 **	0.919 **	0.827 **	1
x3_VRS	0.698 **	0.656 **	0.638 **	0.677 **	0.888 **	0.803 **	0.772 **	1

Notes: ** significance α = 0.001. CRS: constant returns to scale; VRS: variable returns to scale. T: total efficiency; x1—physicians; x2—nurses; x3—other staff; y1—number of hospitalized patients; y2—number of outpatient examinations; y3—number of surgeries.