. 2002 Jun;40(6):2244–2246. doi: 10.1128/JCM.40.6.2244-2246.2002

TABLE 2.

The best models to discriminate duodenal ulcer from gastritis on the basis of H. pylori types

Population (countries)	Predicted strain or characteristic	Coefficient	Odds ratio	c statistic
Combined (Japan, Korea, United States, and Colombia)	BabA negative	−0.721^a	0.49^b	0.583^c
	vacA s1-m2	0.867^a	2.38^b
	vacA s2-m2	−1.209^a	0.30^b
Intercept		0.497
East Asian (Japan and Korea)	BabA negative	−1.079^a	0.34^b	0.543
	vacA s1-m2	0.387	1.47
Intercept		0.569
Western (United States and Colombia)	vacA s1-m2	1.070^a	2.92^b	0.622^c
	vacA s2-m2	−1.428^a	0.24^b
	BabA negative	−0.486	0.62
Intercept		0.374

Coefficient significantly different from 0 at the 0.05 significance level.

Odds ratio is significantly greater or less than 1 at the 0.05 significance level.

Area under the ROC curve is significantly greater than 0.50 at the 0.05 significance level.