Table 10.: Determination of the risk of development of positive BHR in rhinitis-only patients, according to the presence of perennial allergy.

Atopy
(Perennial)
BHR-Positive BHR-Negative OR - Odds Ratio
Positive 6 18 3.33
Negative 1 10 1.00

χ² = 0.40 (p = 0.523) p > 0.05; 95% Confidence interval (0.35 < OR < 31.74).