Associations of long-term exposure to air pollution and physical activity with the risk of systemic inflammation-induced multimorbidity in Chinese adults: results from the China multi-ethnic cohort study (CMEC)

Table 2 Three-year average concentrations of ambient air pollutants

Variables	3-year average concentrations						Pearson correlation coefficients
	Minimum	Maximum	P₂₅	P₅₀	P₇₅	IQR	PM₁	PM_2.5	PM₁₀	NO₂
PM₁	13.0	54.5	19.3	29.2	37.1	17.8	1.00	0.96	0.96	0.90
PM_2.5	16.2	61.6	25.1	40.2	48.2	23.1	0.96	1.00	0.98	0.85
PM₁₀	33.7	100.6	49.7	65.3	75.7	26.0	0.96	0.98	1.00	0.89

PM₁, the particle with an aerodynamic diameter of 1 μm or less; PM_2.5, the particle with an aerodynamic diameter of 2.5 μm or less; PM₁₀, the particle with an aerodynamic diameter of 10 μm or less

ISSN: 1471-2458