Table 6.

CAD around SNPP and statistical analysis for the temporal trend from 2014 to 2020.

Year	CAD (mSv)					Z -value	Z 0.975	Trend
	1st Quarter	2nd Quarter	3rd Quarter	4th Quarter	The total
2014	0.051	0.055	0.058	0.090	0.254	0.943	1.960	No trend
2015	0.079	0.130	0.063	0.078	0.350
2016	0.069	0.107	0.073	0.072	0.321
2017	0.026	0.052	0.083	0.190	0.351
2018	0.090	0.064	0.090	0.216	0.460
2019	0.053	0.074	0.080	0.188	0.395
2020	0.123	0.151	0.099	0.065	0.438
2021	0.076	0.088	0.059	0.038	0.261
Mean ± SD	0.071 ± 0.029	0.090 ± 0.036	0.076 ± 0.015	0.117 ± 0.069	0.354 ± 0.075