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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Environ Int. 2016 May 3;92-93:416–421. doi: 10.1016/j.envint.2016.03.028

Table 2.

Summary statistics of air pollution data

Pollutants (μg/m3) Mean ± SD Percentiles
 IQR
Min 25th 50th 75th Max
PM2.5a 72.6 ± 27.3 25.5 53.8 70.4 94.9 127.9 41.1
PM2.5b 50.4 ± 20.2 6.9 35.5 51.7 67.5 89.2 32.0
O3c 62.6 ± 5.9 26.3 60.9 63.0 65.0 78.6 4.1

Abbreviation: IQR, Interquartile range; SD, standard deviation; PM2.5, particulate matter with an aerodynamic diameter less than or equal to 2.5 μm; O3, ozone.

Note:

a

data derived from a study by Ma et al. and used in the main analyses.

b

data derived from the database of the 2013 Global Burden of Disease project.

c

data derived from the database of the 2013 Global Burden of Disease project.