Table 7. Odds ratios (OR) that a case or control would be of blood group O, unrelated controls only.

All CP, unrelated controls only	Cases	Controls	Case non-carriers	Control non-carriers	OR	95 % CI	P-value
O all CP	23	199	276	256	1.04	0.81-1.34	0.77
O (VHD CP)	60	199	65	256	1.19	0.80-1.77	0.40
O (Alcohol-related CP)	108	199	111	256	1.25	0.91-1.73	0.17
O (Alcohol-related) vs. VHD controls	108	11	111	15	1.33	0.58-3.02	0.50
O (Genetic mutation +)	58	199	93	256	0.80	0.55-1.17	0.25
O (Genetic mutation -)	165	199	183	256	1.16	0.88-1.54	0.30
O (Alcohol-related, Genetic mutation)	88	199	79	256	1.43	1.01-2.05	0.04
O (Genetic mutation -, VHD)	49	199	47	256	1.34	0.86-2.08	0.19

CP = chronic pancreatitis patients; 95% CI=confidence interval

^*VHD = very heavy drinkers

^†Alcohol-related =either the singular or a contributing etiology, as per physician reporting

^¥Mutations in any of the following genes: PRSS1 (cationic trypsinogen), CFTR (cystic fibrosis transmembrane receptor) and SPINK1 (serine protease Kazal type I)