Table 2.

Descriptive statistics of 3-day average ambient PM_2.5 and PM_2.5 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.