. 2016 Nov 5;26(11):593–601. doi: 10.2188/jea.JE20150309

Table 2. Summary of data on Asian dust, other air pollutants, and meteorological factors (March 2010–May 2013).

	Non-Asian-dust days						Asian-dust days						P value^a,b

	Number of days	Mean	SD	25th percentile	Median	75th percentile	Number of days	Mean	SD	25th percentile	Median	75th percentile
Asian dust extinction coefficients, /km	320	0.03	0.03	0.01	0.02	0.03	47	0.07	0.08	0.03	0.05	0.07	<0.01^a

Spherical extinction coefficients, /km	320	0.13	0.11	0.05	0.10	0.16	47	0.19	0.13	0.09	0.16	0.24	<0.01^a

SO₂, ppb	321	1.52	0.77	1.00	1.30	1.80	47	1.98	0.97	1.20	1.60	2.50	<0.01^a
NO₂, ppb	321	7.58	2.28	6.00	7.40	9.00	47	8.11	2.60	6.60	7.70	9.40	0.25^a
Ox, ppb	321	42.98	8.99	38.40	43.40	48.70	47	46.74	8.99	41.50	46.20	53.60	0.015^a
SPM, µg/m³	321	23.95	11.74	16.00	21.60	29.30	47	53.14	33.39	34.30	44.60	56.80	<0.01^a

Average Temperature, °C	321	14.78	4.4	11.5	14.9	18.6	47	17.4	3.9	15.4	18.0	20.3	<0.01^a
Maximum Temperature, °C	321	18.88	4.7	15.3	19.1	22.6	47	22.1	4.2	19.5	22.4	25.6	<0.01^a
Minimum Temperature, °C	321	11.13	4.7	7.5	10.8	15.0	47	13.1	4.2	10.5	13.9	16.6	<0.01^a
Humidity, %	321	67.49	13.3	58.0	68.0	76.0	47	67.2	8.4	62.0	68.0	74.0	0.56^b

SD, standard deviation; SPM, small particulate matter.

P value for ^aMann-Whitney U test and ^bt-test.