Table 1

Risk Factor Associations with ED Visits for Ages 5–12 yrs

Risk Factor Increase
Risk Factor
Mean % Change in Daily Visits per Risk Factor Increase
T-test p-value

0.01 ppm
Ozone
3.2 (1.4, 5)
0.000
1 μg m-3
PM2.5
-0.2 (-0.6, 0.2)
0.331
1000 spores m-3
Mold Count
-0.2 (-1.1, 0.7)
0.707
10 grains m-3
Weed Pollen
-2.9 (-6.8, 1.1)
0.148
100 grains m-3
Tree Pollen
1.8 (0.9, 2.6)
0.000
10 grains m-3
Grass Pollen
1.6 (-2, 5.4)
0.378
1°F
Temperature
0.2 (0.1, 0.4)
0.007

The numbers in parenthesis represent the lower and upper 95% confidence limits for the percent change in visits.

Babin et al. Environmental Health 2007 6:9   doi:10.1186/1476-069X-6-9