Table 1.

Baseline Characteristics.

Characteristics	Cases = 546		Control = 550
GENDER
Male (n, %)	317	58.1%	308	56%
Female (n, %)	229	41.9%	242	44%
Age at collection	61.48 ± 10.611		62.39 ± 8.39

There were no significant statistical differences in age and gender ratio between case and control. The T value and final P-value are −1.577 and 0.115 respectively, and the Chi-square value and P value are 0.474 and 0.491 respectively.