The associations between daily spring pollen counts, over-the-counter allergy medication sales, and asthma syndrome emergency department visits in New York City, 2002-2012

Table 1 Data distribution during March 1^st through June 10^th, 2002-2012 (2002-2011 for OTC allergy medication sales)

Variables	Mean	S.D.	Min.	25 %	50 %	75 %	98 %	Max.
OTC Allergy Medication Sales (# units sold/day)	3493	1953	901	2263	2943	4086	9565	17971
Asthma Syndrome ED Visits (visits/day)
All Ages	269.0	71.6	104	222	254	298	468	704
Age 0-4	47.5	11.7	15	39	47	55	73	100
Age 5-17	64.2	30.8	18	43	58	77	155	243
Age 18-39	65.1	23.0	27	51	60	73	133	215
Age 40-64	72.0	18.1	32	60	70	81	122	169
Age 65+	20.1	5.7	7	16	20	24	32	47
Spring Tree Pollen (grains/m³)
Elm	8.7	39.9	0	0	0	2.2	97.2	624.7
Poplar	6.7	25.8	0	0	0	1.8	77.3	380.1
Maple	15.3	101	0	0	0	7.2	130.0	3091.2
Birch	142.8	649.1	0	0	1.8	21.6	1680.3	10235.3
Beech	2.6	11.6	0	0	0	0	30.9	162.0
Ash	17.9	73.1	0	0	0	2.2	223.3	1029.7
Syc./London plane	9.4	43.6	0	0	0	0	97.2	696.0
Oak	190.6	683.9	0	0	2.1	57.0	1932.1	13040.4
Hickory	11.3	41.4	0	0	0	2.2	131.4	768.9
Weather
Temperature (°C)	12.5	6.7	-7.7	8.1	12.6	17	26.3	31.8
Rel. Humid. (%)	59.7	17.4	20.8	44.6	58.8	73.8	93.3	99.3
Air Pollutant
PM_2.5 (μg/m³)	10.9	6.4	1.2	6.3	9.1	13.8	28.6	42.6
Ozone (ppb)	35.7	11.8	3.9	28.4	34.8	41.8	66.7	93.5

ISSN: 1476-069X