Table 1.

General situation of daily deaths, meteorological factors, and air pollutants of residents in Hulunbuir City from 2014 to 2018

Variable	$\overline{x}\pm s$	Minimum	P25	P50	P75	Maximum
Total deaths/daily	47.86 ± 8.39	25	42	48	53	79
Disease type
Daily death toll of respiratory diseases/person	3.00 ± 1.83	0	2	3	4	11
Daily death toll of circulatory diseases/person	26.31 ± 6.13	9	33	26	30	52
Gender
Male	29.29 ± 6.16	12	25	29	33	55
Female	18.57 ± 4.84	4	15	18	22	35
Age
0–64 years	18.74 ± 4.75	6	16	19	22	36
≥ 65 years old	29.12 ± 6.41	10	25	29	33	54
Meteorological factors
Mean air temperature (°C)	− 0.17 ± 17.35	− 38.8	− 17.5	2.8	15.8	29.5
Mean air pressure (hpa)	939.77 ± 7.69	918.4	934.1	939.4	945.5	962.5
Relative humidity (%)	61.94 ± 15.12	15	52	66	73	94
Wind speed (m/s)	4.40 ± 1.91	1.1	3.0	4.1	5.5	15.4
Air pollutants
SO2 (μg/m3)	7.21 ± 6.18	1.0	3	5	10	58.0
NO2 (μg/m3)	18.42 ± 9.75	1.5	11	16	23	69.0
PM10 (μg/m3)	49.27 ± 34.69	10.0	28	42	60	676.0