Control COPD OR 95% CI P
  No. % No. %
Genotype              
CC 11 18.3 15 37.5 2.597 1.014 – 6.652 0.044*
CT® 40 66.7 21 52.5      
TT 9 15.0 4 10.0 0.847 0.233 – 3.078 FEp = 1.000
CC + TT 20 23.3 19 47.5 1.810 0.797 – 4.111 0.155
Allele frequency              
C® 62 51.7 51 63.8      
T 58 43.3 29 36.2 0.608 0.340 – 1.085 p# = 0.091
p#: p value for Chi square test,FEp : p value for Fisher Exact test, *: Statistical significance at p ≤ 0.05
Table 3B: The genotype and allele frequencies of CD40 − 1C/T between COPD patients and controls.