Table 1.

Summary statistics of outpatient visits for outpatient visits for eczema, air pollutant concentrations and meteorological factors.

Variables	Mean	SD	Minimum	P(25)	Median	P(75)	Maximum
Outpatient Visits for Eczema	279	123	4	198	261	345	772
PM10 (μg/m3)	83	55	7	48	70	104	600
SO2 (μg/m3)	42	30	5	20	34	56	261
NO2 (μg/m3)	60	23	11	43	58	74	174
Temperature (°C)	17	9	−3	10	18	25	36
Humidity (%)	59	18	−1	46	62	73	95

Abbreviations: PM₁₀, particulate matter no greater than 10 microns; SO₂, sulfur dioxide; NO₂, nitrogen dioxide. SD, standard deviation.