Association of ambient particulate matter with hospital admissions, length of hospital stay, and hospital costs due to cardiovascular disease: time-series analysis based on data from the Shanghai Medical Insurance System from 2016 to 2019

Environmental Sciences Europe

Table 2 Mean, SD, and distributions of daily levels of seven air pollutants, temperature, and relative humidity (CHAP dataset)

Variables	Mean	SD	P₅	P₂₅	P₅₀	P₇₅	P₉₅
PM₁, μg/m³	21.38	11.16	7.69	13.34	18.93	27.01	43.28
PM_2.5, μg/m³	37.73	21.39	13.82	22.24	32.35	47.34	78.61
PM₁₀, μg/m³	60.47	29.25	26.36	38.79	53.18	76.23	115.22
O₃, μg/m³	97.47	41.6	43	68	90	120	182
NO₂, μg/m³	40.09	18.12	16	27	37	50	75
SO₂, μg/m³	10.01	4.75	5	7	9	12	19
CO, mg/m³	0.67	0.22	0.4	0.5	0.6	0.8	1.1
Temp, °C	17.66	8.72	3.8	10.1	18.5	24.7	30.7
Relative humidity, %	73.33	12.37	51	65	74	83	92