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. 2022 Apr;293:133570. doi: 10.1016/j.chemosphere.2022.133570

Table 2.

Descriptive statistics of 3-day average ambient PM2.5 and PM2.5 chemical components for the study participants over the study period.

Mean SD Percentiles
IQR
25th 50th 75th
PM2.5 (μg/m3) 42.54 28.56 23.45 30.25 56.38 32.94
Metals (ng/m3)
Sb 2.60 1.24 1.77 2.72 3.58 1.82
Al 148.77 61.89 114.12 131.36 174.55 60.42
As 6.09 3.54 4.45 5.24 7.27 2.82
Cd 1.30 0.66 0.87 1.20 1.88 1.02
Cr 4.43 2.74 3.25 3.37 4.20 0.95
Pb 65.98 32.55 45.93 65.66 93.66 47.72
Mn 19.35 5.49 17.46 18.55 20.91 3.44
Ni 1.67 0.57 1.39 1.82 2.02 0.63
Se 2.26 0.95 1.62 2.11 2.38 0.76
Tl 0.51 0.25 0.35 0.50 0.55 0.21
PAHs (ng/m3)
NAP 0.15 0.06 0.10 0.13 0.17 0.06
ANY 0.37 0.09 0.37 0.40 0.42 0.05
ANA 0.29 0.08 0.29 0.30 0.30 0.01
FLU 0.56 0.20 0.50 0.58 0.61 0.11
PHE 0.47 0.12 0.45 0.49 0.52 0.07
ANT 0.82 0.22 0.76 0.86 0.92 0.16
FLT 0.93 0.29 0.75 0.93 1.12 0.37
PYR 1.05 0.31 0.99 1.05 1.21 0.23
CHR 0.31 0.22 0.18 0.21 0.35 0.17
BaA 0.54 0.18 0.47 0.53 0.61 0.14
BbF 1.32 0.34 1.23 1.39 1.49 0.26
BKF 1.25 0.53 1.02 1.10 1.62 0.60
BaP 1.17 0.33 1.05 1.26 1.43 0.39
DBA 0.54 0.13 0.43 0.54 0.63 0.20
BPE 0.85 0.60 0.48 0.62 1.04 0.55
IPY 0.25 0.20 0.11 0.17 0.41 0.30

Abbreviations: SD, standard deviation; IQR, interquartile range; Sb, Stibium; Al, Aluminum; As, Arsenic; Cd, Cadmium; Cr, Chromium; Pb, Lead; Mn, Manganese; Ni, Nickel; Se, Selenium; Tl, Thallium; PAHs, Polycyclic aromatic hydrocarbons; NAP, Naphthalene; ANA, Acenaphthene; ANY, Acenaphthylene; FLU, Fluorene; PHE, Phenanthrene; ANT, Anthracene; FLT, Fluoranthene; PYR, Pyrene; CHR, Chrysene; BaA, Benzo (a) pyrene; BbF, Benzo (b) fluoranthene; BkF, Benzo (k) fluoranthene; BaP, Benzo (a) pyrene; BPE, Benzo (g,h,i) perylene; DBA, Dibenzo (a,h) anthracene; IPY, Indeno (1,2,3-cd) pyrene.