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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 III.

Prevalence of atopy in 1996 – 1997 and 2006 – 2009. Individuals studied for atoyp at both time points are included only in the 1996–1997 groups (N=361). 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
(# Atopic/
Total)		 Prevalence 2006 – 2009
(# Atopic/
Total)		 Prevalence P- val
Overall 309/687 45.0% 258/576 44.8% 0.95
     Males 156/316 49.4% 118/268 44.0% 0.21
   Females 153/371 41.2% 140/308 45.5% 0.28
Age, Yrs
     ≤10 40/70 57.1% 44/132 33.3% 0.001
   11 to 20 106/199 53.3% 105/220 47.7% 0.28
   21 to 30 69/138 50.0% 26/51 50.9% 1.00
   31 to 40 38/119 31.9% 36/72 50.0% 0.02
   41 to 50 27/82 32.9% 23/47 48.9% 0.09
     >50 29/79 36.7% 24/54 44.4% 0.47