TABLE 2.

Association between cagA status of H. pylori isolates and duodenal ulcer, gastric ulcer, and nonulcer patients

Clinical status	n	No. with H. pylori cagAa	RRc	95% CI	P valueb
Nonulcer	23	12 (52)
Gastric ulcer	28	20 (72)	1.48	0.82–2.68	0.26
Duodenal ulcer	24	21 (87)	2.97	1.05–8.37	0.02

^acagA was analyzed by PCR using the consensus region primers. 

^bχ² for trend = 6.77; P = 0.009. 

^cRR, relative risk.