Table 2.

Signal scores for warfarin-, aspirin- and clopidogrel-associated haematemesis.

Statins	N	PRR (kai2)	ROR (95% two-sided CI)	IC (95% two-sided CI)	EBGM (95% one-sided CI)
Warfarin	268	1.991 (131.982)	2.006 (1.778, 2.234) *	0.985 (0.811, 1.158) *	1.968 (1.778)
Aspirin	332	6.469 (1525.210) *	6.566 (5.889, 7.244) *	2.661 (2.504, 2.818) *	6.425 (5.864) *
Clopidogrel	235	2.254 (163.238) *	2.270 (1.995, 2.544) *	1.160 (0.975, 1.346) *	2.218 (1.991)

N: the number of co-occurrences; PRR: the proportional reporting ratio; ROR: the reporting odds ratio; IC: the information component; EBGM: the empirical Bayes geometric mean; CI: the confidence interval. The asterisk (*) means statistically significant association, i.e., the adverse events are detected as signals.The data are on the associations with haematemesis, and those on haemorrhage, haematoma, melaena and haematochezia have already published previously ²⁶.