Table 1.

Joint effects of vaccination with BCG and vaccinia on melanoma risk ^a

Co-variable	Only BCG	Only vaccinia	Both
Age group
<50 years	0.23 (0.05-0.91) n = 25	0.31 (0.07-0.98) n = 111	0.27 (0.09-0.80) n = 299
≥50 years	0.74 (0.25-2.28) n = 20	0.69 (0.38-1.22) n = 362	0.48 (0.26-0.86) n = 313

^aWith respect to two age groups, <50 and ≥50 years. Data expressed as Odds Ratios (95% Confidence interval), adjusted for centre, sex, ethnic origin, skin type, freckling index, number of naevi and number of sunburns. n = number of cases and controls. Summarized from the FEBIM study [81].