Table 1:

Characteristics and the quality score of the included studies

Publication year	Nation	Subjects source	Sample size	Mean age (year)	H. pylori test	BMI (kg/m2)	Association (OR)	NOS*	Reference
2018	Saudi Arabia	General	680	31.22 ± 8.10	Histology	≥30	Yes (1.98)	10	[23]
2018	Pakistan	General	662	44 ± 16	Histology	>23	Yes (2.91)	9	[28]
2018	Taiwan	General	2604	58.7± 13.2	UBT*1	≥24	Yes (1.836)	10	[24]
2017	China	General	2977	49 ± 19	Serology	≥24	No (1.18)	9	[31]
2016	Taiwan	BE*2	736	53.8±13.7	RUT*3	≥27	No (2.17)	9	[35]
2016	Korea	Child	164	9.89±3.28	Serology	*4	Yes (1.26)	8	[25]
2015	Bahrain	General	200	38.6±11.06	RUT*3	>25	Yes (2.9)	9	[27]
2015	Brazil	General	137	39.7 ± 12.0	Histology	≥25	No (1.36)	9	[33]
2015	USA	Child	319	10.5 ± 4.7	SAT*5	*6	No (2.0)	8	[32]
2011	Brazil	BP*7	100	35.4	Histology	≥25	No (0.49)	8	[30]
2009	Turkey	General	214	24.3±5.4	Serology	≥30	Yes (2.11)	8	[12]
2008	Ohio	BP*7	2684	44 ± 13	Serology	>30	Yes (1.7)	9	[26]
2005	USA	General	7003	45.2±0.45	Serology	≥25	No (1.34)	9	[34]
2005	Taiwan	General	1097	31.9 ± 9.2	Serology	≥25	No (0.5)	8	[13]
2002	Salamis	General	122	22.4 ± 2.4	Serology	≥25	No (1.24)	8	[29]

^*Newcastle-Ottawa quality assessment scale

^*1Urea Breath Test

^*2Barrett's esophagus

^*3Rapid Urea Test

^*4Body weight ≥90th percentile

^*5Stool Antigen Test

^*6Body weight ≥85th percentile

^*7Bariatric patient