. 2020 Aug 5;204:111035. doi: 10.1016/j.ecoenv.2020.111035

Table 2.

Correlation analysis between R₀ and daily air quality data (n = 29).

Index	Coefficient	P
AQI	0.006^a	0.974
CO	0.145	0.452
CO_24 h	0.141	0.464
NO₂	−0.320^a	0.090
NO₂_24 h	−0.318^a	0.092
O₃	−0.171^a	0.375
O₃_24 h	−0.166	0.389
O₃_8 h	−0.166^a	0.389
O₃_8 h_24 h	−0.164^a	0.390
PM₁₀	−0.013^a	0.948
PM₁₀_24 h	−0.002^a	0.990
PM_2.5	0.064^a	0.741
PM_2.5_24 h	0.070^a	0.719
SO₂	-0.064	0.741
SO₂_24 h	-0.063	0.745

The correlations were quantified by Pearson correlation coefficient (designated with “a”) or with Spearman correlation coefficient (no letter designation).