Preliminary study of automatic gastric cancer risk classification from photofluorography

Table 1 ABC (D) stratification

	A	B	C (D)
H. pylori antibody level	-	+	+ (-)
PG levels	-	-	+

Patients with H. pylori antibody level ≥ 10 U/mL were classified as (+) and patients with PG I ≤ 70 ng/mL and PG I/PG II ratio ≤ 3 were classified as (+). H. pylori: Helicobacter pylori.

Table 2 Confusion matrix for the first stage

		Predicted class
		H. pylori non-infection	H. pylori infection
True class	Group A	979	151
	Group B or C (D)	102	868

H. pylori: Helicobacter pylori.

Table 3 Confusion matrix for the second stage

		Predicted class
		Non-severe	Severe
True class	Group B	331	177
	Group C (D)	98	364