. 2022 Jul 5;15(10):1869–1880. doi: 10.1007/s11869-022-01222-y

Table 1.

Correlation of PM concentrations with the level of activity

Indicator	PM₁₀	PM_2.5
Number of trips	r^a = 0.30 p = 0.06^b	r = 0.26 p = 0.11
Occupancy	r = 0.13 p = 0.43	r = 0.1 p = 0.51

Indicator

PM₁₀

PM_2.5

Number of trips

r^a = 0.30

p = 0.06^b

r = 0.26

p = 0.11

Occupancy

r = 0.13

p = 0.43

r = 0.1

p = 0.51

^aPearson’s correlation coefficient

^bSignificant to the 10% level