Table 3.

Selected results from Poisson generalized additive model (GAM)^a

Aeroallergen (lag days)b	Relative riskc (95% CI)	Estimated increase in daily asthma visitsd (95% CI)
Oak/maple pollen (3)	1.23 (1.02–1.49)	23% (2–49%)
Pinaceae pollen (5)	1.34 (1.24–1.45)	34% (24–45%)
Ragweed pollen (5)	1.54 (1.02–2.33)	54% (2–133%)

^aConcentrations of total pollen, Cladosporium and Alternaria were also found to be statistically significant, but their RRs were too small to be clinically meaningful.

^bNumber of days between asthma hospital visit and high spore levels prior to visit.

^cThe relative risk is for a 100 counts/m³ increase in aeroallergen concentration.

^dThe estimated increase in daily asthma visits is for a 100 counts/m³ increase in aeroallergen concentration.