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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: J Allergy Clin Immunol. 2011 Aug 15;128(4):774–779. doi: 10.1016/j.jaci.2011.06.046

Table II.

Prevalence of asthma in 1996–1997 and 2006–2009. Individuals studied for asthma at both time points are included only in the 1996–1997 groups (N=309). P-values are calculated using a Fisher’s exact test but are not corrected for relatedness of individuals in the sample. P-values <0.05 are in bold font.

1996 – 1997
(# Asthma/
Total)		 Prevalence 2006 – 2009
(# Asthma/
Total)		 Prevalence P-val
Overall 45/597 7.5% 59/532 11.1% 0.049
     Males 27/286 9.4% 27/247 10.9% 0.57
   Females 18/311 5.8% 32/285 11.2% 0.02
Age, Yrs
     ≤10 9/38 23.7% 17/80 21.3% 0.81
   11 to 20 11/177 6.2% 27/232 11.6% 0.08
   21 to 30 5/126 4.0% 7/55 12.7% 0.047
   31 to 40 10/97 10.3% 2/65 3.1% 0.126
   41 to 50 5/83 6.0% 2/52 3.8% 0.70
     >50 5/76 6.6% 4/48 8.3% 0.73