Changes in the spectrum of gastric polyps in the Chinese population

Table 1 Overall demographics of gastric polyps, fundic gland polyps, hyperplastic polyps and adenomas n (%)

	GP	FGP	HPP	Adenomas
Age (yr)	54.7 ± 12.9	53.9 ± 12.6	55.2 ± 13.3	66.4 ± 10.1
(mean ± SD)
Gender (F/M)	2574:1469	1190:857	580:439	16:59
	(1.75:1)	(1.39:1)	(1.32:1)	(1:3.69)
Helicobacter pylori infection rate	186/4043	82/2047	59/1019	1/75
	(4.60)	(4.0)	(5.79)	(1.33)
Reflux esophagitis incidence	356/4043	219/2047	39/1019	-
	(8.81)	(10.70)	(3.83)
Dysplasia	68/4043 (1.68)	3/2047 (0.15)	14/2047 (0.68)	45/75 (60)
HIN	25/4043 (0.62)	-	-	23/75 (31)

GP: Gastric polyp; FGP: Fundic gland polyp; HPP: Hyperplastic polyp.

Table 2 Demographics, prevalence and sex distribution of gastric polyps in the past 10 years n (%)

Year	Cases	Age (yr)	Gender (M/F)	Prevalence
		(mean ± SD)
2004	80	59.6 ± 14.7	48:32 (1.5:1)	80/8025 (1.0)
2005	74	57.5 ± 11.4	34:40 (1:1.18)	74/10739 (0.7)
2006	140	55.6 ± 10.7	57:83 (1:1.46)	140/13814 (0.8)
2007	218	52.7 ± 11.3	93:125 (1:1.34)	218/17372 (1.3)
2008	275	53.3 ± 10.7	105:160 (1:1.52)	275/17941 (1.5)
2009	462	54.8 ± 13.1	171:291 (1:1.70)	462/18364 (2.5)
2010	496	54.7 ± 12.8	183:313 (1:1.71)	496/17125 (2.9)
2011	664	54.5 ± 12.5	223:441 (1:1.98)	664/17893 (3.7)
2012	806	54.8 ± 12.9	284:522 (1:1.83)	806/18842 (4.7)
2013	828	54.6 ± 12.1	271:575 (1:2.12)	828/17787 (4.7)
Total	4043	54.7 ± 12.9	1469:2574 (1:1.75)	4043/157902 (2.6)

Table 3 Age distribution of gastric polyps in the past 10 years n (%)

Year	Group A	Group B	Group C	Group D
2004	3/80 (3.8)	10/80 (12.5)	17/80 (21.25)	50/80 (62.5)
2005	1/74 (1.35)	13/74 (17.57)	24/74 (32.43)	36/74 (48.65)
2006	5/140 (3.57)	22/140 (15.71)	55/140 (39.29)	58/140 (41.43)
2007	12/218 (5.5)	51/218 (23.4)	88/218 (40.37)	67/218 (30.73)
2008	14/275 (5.09)	54/275 (19.26)	121/275 (44)	86/275 (31.27)
2009	13/462 (2.81)	89/462 (18.75)	195/462 (42.21)	165/462 (35.71)
2010	10/496 (2.02)	93/496 (19.64)	229/496 (46.17)	164/496 (33.06)
2011	22/664 (3.31)	97/664 (14.61)	329/664 (49.55)	216/664 (32.53)
2012	28/806 (3.47)	131/806 (16.25)	360/806 (44.67)	287/806 (35.61)
2013	22/828 (2.66)	139/828 (16.69)	401/828 (48.43)	266/828 (32.13)
Total	130/4043 (3.22)	699/4043 (17.29)	1819/4043(44.99)	1395/4043 (34.5)

Table 4 Spectra of gastric polyps in previous and current studies

Ref.	Country	Pub. year	Years	Prevalence of polyps	No. of polyps	Median age (yr)	Gender(F/M)	FGP	HPP	Adenoma
Deppisch et al[7]	United States	1989	10	-	121	-	-	17%	75%	8.6%
Stolte et al[12]	Germany	1994	20	-	5515	NR	NR	47%	28.3%	9%
Sivelli et al[13]	Italy	2002	6		164	61.4	01:01.5	NR	44.5%	16.4%
Gencosmanoglu et al[14]	Turkey	2003	5	-	150	53	1.4:1	14%	64%	3%
Morais et al[1]	Brazil	2007	5	153/26000 (0.59%)	153	64	01:01.4	16.3%	71.3%	12.4%
Carmack et al[5]	United States	2009	1	7877/121564 (6.35%)	7877	56	1.4:1	77%	17%	0.7%
Cao et al[10]	China	2000	1	68/6784 (1.0%)	68	56.8	1.7:1	8.8%	48.5%	14.7%
Cao et al[10]	China	2010	1	183/17337 (1.0%)	183	55.9	2.0:1	66.1%	20.8%	4.9%
The present study	China	2004-2013	10	183/157902 (2.60%)	4043	54.7	1.75: 1	65%	25%	1.9%
The present study	China	2013	1	828/17787 (4.7%)	828	54.6	2.12:1	75%	17%	0.5%
Sonnenberg et al[17]	United States	2015	1	71575 /927137 (7.72%)	71575	-	2.03:1	79.9%	18.6%	0.92%

NR: Not reported; GP: Gastric polyp; FGP: Fundic gland polyp; HPP: Hyperplastic polyp.