Effect of esophageal cancer- and stomach cancer-preventing vinegar on N-nitrosoproline formation in the human body

Table 1 Effect of esophageal cancer- and stomach cancer-preventing vinegar in blocking synthesis of N-nitrosoproline in 76 patients

	Content of N-nitrosoproline (nmol/24 h urine)
	Stage A	Stage B	Stage C	P
x	26.18	66.84	23.91
s	5.78	17.29	4.37	< 0.001

Table 2 Effect of esophageal cancer- and stomach cancer-preventing vinegar in blocking synthesis of N-nitrosoproline in 76 patients according to disease subgrouping

Group	Average age, years	Sex, male/female	Content of N-nitrosoproline			Blockage rate, %
			Stage A	Stage B	Stage C
Esophagus	40	9/3	21.30	60.17	28.21	82.22
Esophageal + cardia	46	9/6	30.15	81.42	23.98	122.03
Esophageal + non-typical hyperplasia	48	6/6	26.22	46.60	20.86	126.30
Superficial gastritis	46	9/6	28.63	73.10	25.11	107.91
Atrophic gastritis	54	9/3	32.86	89.63	28.37	107.90
Intestinal metaplasia + non-typical hyperplasia	54	6/5	17.90	50.13	16.90	103.10

Blockage rate, % = [(Stage B Stage C)/(Stage B Stage A)] × 100%