Table 2.
Atopy in 1659 Italian military cadets according to index of exposure to Toxoplasma gondii, Helicobacter pylori, and hepatitis A virus
| Index of exposure | No of participants | Absent atopy (<0)*†
|
Low atopy (0 to <1.2)*
|
High atopy (⩾1.2)*
|
||||
|---|---|---|---|---|---|---|---|---|
| No (%) | No (%) | Odds ratio (95% CI)‡ | No (%) | Odds ratio (95% CI)‡ | ||||
| 0 | 796 | 494 (62.1) | 142 (17.8) | 1 | 160 (20.1) | 1 | ||
| 1 | 618 | 421 (68.1) | 109 (17.6) | 0.88 (0.66 to 1.18) | 88 (14.2) | 0.70 (0.52 to 0.94)§ | ||
| 2 or 3 | 245 | 181 (73.9) | 45 (18.4) | 0.87 (0.59 to 1.30) | 19 (7.8) | 0.37 (0.22 to 0.63)§ | ||
*
Logarithm of ratio units=log (fluorescence units in sample/fluorescence units in reference serum).
†
Reference group.
‡
Adjusted for older and younger siblings, age, paternal education, and population density.
§
P for linear trend=0.0001.