. 2021 Aug 2;9:706955. doi: 10.3389/fpubh.2021.706955

Table 3.

Correlation analysis of each variable.

		M	U	Population	Urbanization	Hospital	Child	SO₂
M	Pearson	1
	Sig.
U	Pearson	0.246^**	1
	Sig.	0.000
Population	Pearson	0.375^**	0.059^*	1
	Sig.	0.000	0.218
Urbanization	Pearson	−0.29^*	−0.304^*	0.032	1
	Sig.	0.000	0.000	0.508
Hospital	Pearson	0.351^**	−0.113^*	0.768^**	−0.039	1
	Sig.	0.000	0.018	0.000	0.419
Child	Pearson	0.168^**	0.098^*	−0.146^**	−0.793^**	−0.116^*	1
	Sig.	0.000	0.041	0.002	0.000	0.016
SO₂	Pearson	0.265^**	0.305^**	0.741^**	−0.046	0.520^**	−0.09^*	1
	Sig.	0.000	0.000	0.000	0.338	0.000	0.051

^{*, **}

: Significant at the 0.1 and 0.05 level, respectively.