Gastric mucosal precancerous lesions in Helicobacter pylori-infected pediatric patients in central China: A single-center, retrospective investigation

Table 6 Degree of lymphocyte infiltration in Helicobacter pylori-positive and -negative patients

Age group	H. pylori+				H. pylori-				Z	P value
	n	Mild	Moderate	Marked	n	Mild	Moderate	Marked
1-4	22	10 (45.45)	11 (50)	1 (4.55)	32	17 (53.12)	14 (43.75)	1 ( 3.13)	0.57	0.569
5-8	156	67 (42.95)	75 (48.08)	14 (8.97)	43	24 (55.81)	18 (41.86)	1 (2.33)	1.737	0.082
9-12	383	161 (42.04)	195 (50.91)	27 (7.05)	52	31 (59.62)	20 (38.46)	1 (1.92)	2.539	0.01a
13-18	293	112 (38.23)	151 (51.54)	30 (10.24)	34	19 (55.88)	14 (41.18)	1 (2.94)	2.164	0.03b
Total	854	350 (40.98)	432 (50.59)	72 (8.43)	161	91 (56.52)	66 (40.99)	4 (2.48)	3.997	< 0.00c

^aP < 0.05: Degree of lymphocyte infiltration in Helicobacter pylori (H. pylori)-positive patients were compared with -negative patients in 9-12 years age group.

^bP < 0.05: Degree of lymphocyte infiltration in H. pylori-positive patients were compared with -negative patients in 13-18 years age group.

^cP < 0.05: Degree of lymphocyte infiltration was compared between H. pylori-positive and -negative groups.

Data are n (%), unless otherwise indicated. H. pylori: Helicobacter pylori.