Among alcohol drinkers, those with Cpn IgG+ were 2.45 times as likely to develop lung cancer (95% CI = 1.27–4.75), and those with Cpn IgA+ were 2.68 times as likely to develop lung cancer (95% CI = 1.40–5.13) (Fig. 2). The gene discussed is CPN1; the disease is lung carcinoma.