In addition, 193,000 fewer asthma attacks are estimated to occur in 2010 and 373,000 fewer in 2020.
Asthma attacks are a direct result of the benefits. 
mnli hypothesis: Asthma attacks are a direct result of the benefits.  premise: In addition, 193,000 fewer asthma attacks are estimated to occur in 2010 and 373,000 fewer in 2020.