Table 1. Daily hospital admissions for asthma and upper respiratory infections, air pollutants, outdoor pollen, and temperature in New York City, from 1999 to 2009.

	Percentile
	Mean (SD)	Min	25th	50th	75th	Max
Hospital Admissions for Asthma (N)
Total	73.54 (22.39)	0	57	74	88	175
Age < 6 years	17.39 (8.39)	0	11	17	22	70
Age 6–18 years	12.02 (7.37)	0	6	11	16	60
Age 19–49 years	19.57 (6.86)	0	15	19	24	62
Age 50+ years	24.56 (24.56)	0	19	24	29	66
High SES	28.16 (9.66)	0	22	28	34	75
Low SES	44.73 (14.40)	0	34	44	54	107
Hospital Admissions for Upper Respiratory Infections (N)
;Total	156.35 (48.68)	0	123	151	181	534
Age < 6 years	36.49 (21.17)	0	20	32	47	124
Age 6–18 years	7.50 (4.04)	0	5	7	10	43
Age 19–49 years	24.74 (8.43)	0	19	24	29	75
Age 50+ years	87.62 (26.30)	0	72	85	99	333
High SES	85.69 (27.23)	0	68	82	98	308
Low SES	68.09 (23.19)	0	51	66	81	217
Air Pollutants
8-hour max ozone (ppb)	30.73 (16.90)	2.00	18.60	28.00	39.90	105.40
24-hour average PM2.5 (μg/m3)	13.76 (8.25)	2.13	7.67	11.66	17.70	80.70
Outdoor Pollena (grains/m3)
Total pollen	234.55 (825.79)	0	4.42	15.80	92.80	16,425.15
Total tree pollen	223.83 (822.24)	0	0.00	4.42	73.82	16,405.35
Total weed pollen	4.81 (10.48)	0	0.00	0.00	5.40	114.90
Temperature (°F)
Daily average temperature	55.78 (17.04)	8.80	42.10	55.80	71.00	93.00
Daily minimum temperature	49.67 (16.67)	2.00	37.00	50.00	65.00	86.00
Daily maximum temperature	62.18 (17.95)	16.00	48.00	62.10	78.00	101.00

PM_2.5 = Fine Particulate Matter; ppb = Parts Per Billion; SD = Standard Deviation; SES = Socioeconomic Status; μg/m³ = Microgram Per Cubic Meter.

(a) Pollen data are available from March to October, 2002–2006.