Table 4. Concentrations of total IgE among 1659 Italian military cadets according to atopy and an index of exposure to Toxoplasma gondii, Helicobacter pylori, and hepatitis A virus. Values are geometric mean (SD) unless stated otherwise


Index of exposure Total IgE concentration (kU/l)
All Absent atopy (<0)* Low atopy (0 to <1.2)* High atopy (>= 1.2)*

n=1659 n=1096 n=296 n=267
0 88.9 (4.5) 45.7 (3.6) 158.1 (3.1) 417.8 (2.5)
1 76.9 (4.1) 49.0 (3.5) 123.3 (3.0) 371.5 (2.7)
2 or 3 74.5 (3.8) 50.2 (3.3) 177.4 (2.9) 423.6 (2.5)
F valuedagger 2.37 0.53 2.30 0.47
P value 0.09 0.59 0.10 0.62

* Logarithm of ratio units=log (fluorescence units in sample/fluorescence units in reference serum).
dagger From analysis of variance.