Table 11.: Determination of the risk of development of positive BHR in rhinitis-only patients, according to the presence of combination of seasonal and perennial allergy.

Atopy (
Seasonal
and Perennial)
BHR-Positive BHR-Negative OR - Odds Ratio
Positive 6 16 3.75
Negative 1 10 1.00

χ² = 0.56 (p = 0.451) p >0.05 95% Confidence interval (0.39 < OR < 35.92).