Long-term exposure to PM10 and NO2 in relation to lung function and imaging phenotypes in a COPD cohort

Respiratory Research

Table 2 Summary statistics and Pearson correlation coefficient of individual-level PM₁₀ and NO₂ concentrations estimated at participant homes in the Korean CODA cohort (n = 457)

	Mean ± SD	IQR	Percentiles					Correlation coefficient(r)
	Mean ± SD	IQR	5th	25th	50th	75th	95th	PM₁₀	No₂
PM₁₀ (ug/m³)	43.1 ± 2.9	4.4	38.4	41.0	43.1	45.4	47.4	-	0.44^***
NO₂ (ppb)	13.6 ± 2.1	3.0	10.2	12.3	13.5	15.3	17.2		-

ISSN: 1465-993X