Genotype Control Cases OR Sig. No. % No. % COPD CC 11 18.3 15 37.5 0.357* (0.130 – 0.975) 0.045* CT® 40 66.7 21 52.5     TT 9 15.0 4 10.0 0.307 (0.067 – 1.401) 0.127 Logistic regression analysis for the risk of COPD with the smoking status as covariates. *: Statistical significance at p ≤ 0.05 No significant association was established between genotype distributions and the smoking status nor the spirometric classification of severity in either asthmatic or COPD patients.

Table 4B: The comparison of genotype distributions between normal control subjects and subjects with COPD.