Table 4.

Median (interquartile range) metal concentrations (μg/kg) in aerosols by puff duration.

	Median (IQR) in CD			Overall p-value	Linear regression p-value			Beta value (95% CI)
	1 s (n=6)	2 s (n=6)	4 s (n=6)		1 vs. 2 s	1 vs. 4 s	2 vs. 4 s	1 vs. 2 s	1 vs. 4 s	2 vs. 4 s
Al	4.14 (3.38–14.7)	4.43 (4.18–4.89)	7.98 (4.89–32.8)	0.20	0.52	0.24	0.08	−0.32 (−1.37, 0.72)	0.60 (−0.45, 1.65)	0.92 (−0.13, 1.97)
As	0.21 (0.15–1.59)	0.21 (0.10–0.33)	0.11 (0.07–0.18)	0.12	0.23	0.04	0.35	−0.73 (−1.96, 0.51)	−1.28 (−2.52, −0.05)	−0.56 (−1.79, 0.68)
Cd	0.05 (0.03–0.15)	0.18 (0.09–0.25)	0.43 (0.20–0.51)	0.14	0.35	0.05	0.26	0.63 (−0.77, 2.04)	1.40 (−0.006, 2.81)	0.77 (−0.64, 2.18)
Cr	0.51 (0.16–2.50)	0.20 (0.09–0.42)	0.15 (0.12–0.25)	0.35	0.23	0.20	0.92	−0.91 (−2.46, 0.64)	−0.98 (−2.54, 0.57)	−0.07 (−1.63, 1.48)
Cu	27.7 (3.82–82.6)	13.3 (2.98–28.6)	20.7 (8.55–33.8)	0.83	0.55	0.82	0.71	−0.53 (−2.41, 1.34)	−0.20 (−2.08, 1.68)	0.34 (−1.54, 2.21)
Fe	3.97 (3.69–4.46)	3.69 (3.66–3.75)	4.03 (3.70–4.14)	0.32	0.15	0.29	0.69	−0.31 (−0.75, 0.13)	−0.23 (−0.67, 0.21)	0.08 (−0.35, 0.52)
Mn	0.25 (0.04–1.41)	0.03 (0.03–0.10)	0.07 (0.05–0.28)	0.39	0.18	0.43	0.55	−1.23 (−3.07, 0.62)	−0.70 (−2.54, 1.14)	0.53 (−1.32, 2.37)
Ni	12.7 (8.14–18.0)	7.67 (2.91–17.1)	6.89 (0.57–17.7)	0.26	0.49	0.11	0.33	−0.62 (−2.52, 1.27)	−1.52 (−3.41, 0.38)	−0.89 (−2.79, 1.00)
Pb	6.39 (1.14–12.49)	14.6 (1.42–47.4)	5.30 (3.95–5.96)	0.77	0.55	0.98	0.53	0.55 (−1.37, 2.47)	−0.02 (−1.95, 1.90)	−0.57 (−2.50, 1.35)
Sb	0.21 (0.08–0.39)	0.03 (0.03–0.03)	0.07 (0.04–0.42)	0.03	0.01	0.43	0.05	−1.87 (−3.23, −0.51)	−0.52 (−1.88, 0.84)	1.35 (−0.01, 2.70)
Sn	1.62 (0.74–3.09)	1.85 (0.51–3.04)	3.45 (2.14–4.55)	0.43	0.92	0.29	0.25	−0.06 (−1.28, 1.16)	0.63 (−0.59, 1.86)	0.69 (−0.53, 1.92)
U	0.03 (0.03–0.03)	0.03 (0.03–0.03)	0.04 (0.03–0.04)	0.25	0.64	0.24	0.11	−0.02 (−0.13, 0.08)	0.06 (−0.05, 0.17)	0.08 (−0.02, 0.19)
W	0.03 (0.03–0.22)	0.03 (0.03–0.03)	0.04 (0.04–0.04)	0.25	0.11	0.23	0.69	−0.66 (−1.49, 0.18)	−0.49 (−1.33, 0.34)	0.16 (−0.67, 1.00)
Zn	306 (268–510)	371 (285–1391)	442 (340–488)	0.80	0.53	0.87	0.64	0.32 (−0.73, 1.36)	0.08 (−0.96, 1.13)	−0.24 (−1.28, 0.81)
	Median (IQR) in OD			Overall p-value	Linear regression p-value			Beta value (95% CI)
	1 s (n=6)	2 s (n=6)	4 s (n=6)		1 vs. 2 s	1 vs. 4 s	2 vs. 4 s	1 vs. 2 s	1 vs. 4 s	2 vs. 4 s
Al	9.34 (6.62–18.4)	7.87 (4.61–10.4)	4.18 (3.87–5.62)	0.27	0.41	0.11	0.41	−0.38 (−1.33, 0.57)	−0.76 (−1.71, 0.19)	−0.38 (−1.33, 0.57)
As	1.21 (0.12–2.78)	3.41 (2.27–3.86)	3.05 (2.64–3.38)	0.07	0.05	0.04	0.94	1.53 (0.01, 3.06)	1.59 (0.06, 3.11)	0.05 (−1.47, 1.58)
Cd	0.44 (0.24–0.54)	0.23 (0.17–0.77)	0.40 (0.19–0.62)	0.86	0.71	0.61	0.89	−0.22 (−1.44, 1.00)	−0.30 (−1.52, 0.92)	−0.08 (−1.30, 1.14)
Cr	26.0 (3.76–63.1)	19.3 (3.17–94.8)	25.3 (2.32–58.1)	0.93	0.86	0.71	0.84	−0.19 (−2.58, 2.19)	−0.42 (−2.80, 1.97)	−0.23 (−2.61, 2.15)
Cu	893 (164–2203)	735 (170–3157)	732 (120–1593)	0.88	0.92	0.63	0.71	−0.10 (−2.17, 1.96)	−0.47 (−2.54, 1.59)	−0.37 (−2.44, 1.69)
Fe	143 (15.5–377)	107 (14.9–569)	143 (6.0–364)	0.93	0.86	0.71	0.84	−0.24 (−3.14, 2.66)	−0.52 (−3.42, 2.38)	−0.28 (−3.18, 2.62)
Mn	39.5 (32.2–55.3)	33.5 (30.8–48.1)	24.4 (20.3–29.4)	0.24	0.39	0.10	0.40	−0.29 (−0.96, 0.39)	−0.56 (−1.24, 0.12)	−0.28 (−0.96, 0.40)
Ni	7848 (6143–10428)	4927 (4226–10241)	3914 (2487–5470)	0.09	0.28	0.03	0.23	−0.43 (−1.24, 0.38)	−0.91 (−1.72, −0.10)	−0.48 (−1.29, 0.33)
Pb	267 (235–367)	210 (208–556.3)	252 (140–366)	0.64	0.74	0.36	0.56	−0.15 (−1.07, 0.77)	−0.40 (−1.32, 0.51)	−0.26 (−1.18, 0.66)
Sb	2.37 (1.72–3.30)	5.17 (3.76–5.62)	4.73 (2.92–4.94)	0.39	0.17	0.47	0.51	0.46 (−0.23, 1.15)	0.24 (−0.45, 0.93)	−0.22 (−0.91, 0.47)
Sn	43.8 (33.7–54.0)	30.1 (21.7–89.9)	39.4 (13.0–65.8)	0.65	0.66	0.36	0.63	−0.24 (−1.37, 0.90)	−0.50 (−1.63, 0.63)	−0.26 (−1.40, 0.87)
U	0.04 (0.04–0.04)	0.04 (0.04–0.04)	0.04 (0.04–0.04)	0.89	0.64	0.76	0.87	−0.009 (−0.05, 0.03)	−0.006 (−0.05, 0.03)	0.003 (−0.04, 0.04)
W	0.04 (0.04–0.04)	0.04 (0.04–0.04)	0.04 (0.04–0.04)	0.38	0.23	0.24	0.98	−0.26 (−0.69, 0.18)	−0.25 (−0.68, 0.18)	0.006 (−0.43, 0.44)
Zn	3543 (2995–4314)	2705 (2246–6640)	3674 (1793–5124)	0.78	0.69	0.49	0.78	−0.17 (−1.05, 0.71)	−0.29 (−1.17, 0.59)	−0.12 (−1.00, 0.76)