The association between periodontal diseases and helicobacter pylori: an updated meta-analysis of observational studies

Moradi, Yousef; Majidi, Lobat; Khateri, Sorour; Azh, Nima; Gheshlagh, Reza Ghanei; Saniee, Nadia; Zarei, Mostafa; Moradpour, Farhad

doi:10.1186/s12903-023-03232-3

Table 2 The characteristics of included studies (Case-Control and Cross- Sectional Studies)

From: The association between periodontal diseases and helicobacter pylori: an updated meta-analysis of observational studies

Authors	Years	Design	Study	Sample Size	Population	Age	Country	A	B	C	D	Methods	Sample	NOS
Nisha KJ, et al. [26]	2016	Cross Sectional	Community	499	General Population	43.67	India	180	113	90	117	Rapid Urease Test	Oral Sample	7
Nisha KJ, et al. [26]	2016	Cross Sectional	Community	500	General Population	43.67	India	209	84	136	71	Serology	Oral Sample	6
Dye BA, et al. [19]	2002	Cross Sectional	Community	4504	General Population		USA	202	951	291	3030	ELISA	Oral Sample	8
LX Gong, et al. [3]	2011	Case Control	Community	562	Chronic Periodontal		China	438	58	41	25	Rapid Urease Test	Oral Sample	8
Zheng P, et al. [28]	2015	Case Control	Community	140	Elderly Population	63.8	China	40	30	24	46	Polymerase Chain Reaction (PCR)	Oral Sample	7
MY Wang, et al. [5]	2015	Case Control	Community	200	Chronic Periodontal		China	103	17	59	21	Rapid Urease Test	Oral Sample	7
Jing Li, et al. [30]	2015	Case Control	Community	176	Chronic Periodontal		China	69	16	52	37	Rapid Urease Test	Oral Sample	8
Umeda M, et al. [31]	2003	Cross Sectional	Hospital	36	Chronic Periodontal	54.5	Japan	7	1	10	10	Polymerase Chain Reaction (PCR)	Oral Sample	7
Anand PS, et al. [1]	2006	Case Control	Hospital	134	Gastric Patients	40	India	30	20	35	49	Rapid Urease Test	Oral Sample	7
Souto R, et al. [32]	2008	Cross Sectional	Hospital	225	Chronic Periodontal	39.3	Brazil	40	4	129	52	Polymerase Chain Reaction (PCR)	Oral Sample	8
Al Asqah M, et al. [33]	2009	Case Control	Hospital	101	Gastric Patients	40.77	Saudi Arabia	49	17	13	22	Rapid Urease Test	Oral Sample	8
Al Asqah M, et al. [33]	2009	Case Control	Hospital	101	Gastric Patients	40.77	Saudi Arabia	37	17	13	22	Rapid Urease Test	Stomach	8
Medina ML, et al. [34]	2010	Case Control	Hospital	98	Gastric Patients	44	Argentina	15	3	28	52	Polymerase Chain Reaction (PCR)	Oral Sample	8
Silva DG, et al. [18]	2010	Cross Sectional	Hospital	115	Gastric Patients	50	Brazil	36	22	31	26	Polymerase Chain Reaction (PCR)	Oral Sample	6
Salehi MR, et al. [16]	2013	Case Control	Hospital	100	Chronic Periodontal	35.53	Iran	9	12	41	38	Polymerase Chain Reaction (PCR)	Oral Sample	6
Sujatha S, et al. [35]	2015	Cross Sectional	Hospital	40	Gastric Patients	45.15	India	26	2	6	6	Rapid Urease Test	Oral Sample	7
Yang J, et al. [36]	2016	Case Control	Hospital	212	Chronic Periodontal	56.5	China	78	58	25	51	Polymerase Chain Reaction (PCR)	Oral Sample	7
Tahbaz SV, et al. [37]	2017	Case Control	Hospital	100	Chronic Periodontal	54.5	Iran	4	1	46	49	Polymerase Chain Reaction (PCR)	Oral Sample	7
Riggio MP, et al. [38]	1999	Cross Sectional	Hospital	73	Chronic Periodontal	45.1	UK	11	18	13	31	Polymerase Chain Reaction (PCR)	Oral Sample	7
Li Wang, et al. [18]	2001	Case Control	Hospital	106	Chronic Periodontal		China	21	41	4	40	Polymerase Chain Reaction (PCR)	Oral Sample	7
Al-Refai AN, et al. [40]	2002	Case Control	Hospital	135	Chronic Periodontal	37.2	Saudi Arabia	67	8	52	8	Rapid Urease Test	Oral Sample	8
YH Jiang, et al. [20]	2002	Case Control	Hospital	60	Chronic Periodontal		China	29	11	7	13	Polymerase Chain Reaction (PCR)	Oral Sample	6
Jing Gao, et al. [42]	2011	Case Control	Hospital	76	Chronic Periodontal		China	24	13	15	24	Polymerase Chain Reaction (PCR)	Oral Sample	7
A Tsimpiris, et al. [43]	2021	Case Control	Hospital	65	Chronic Periodontal	55.5	Greece	6	27	7	25	Polymerase Chain Reaction (PCR)	Oral Sample	7
Almashhadany DA, et al. [44]	2022	Cross Sectional	Hospital	280	Chronic Periodontal	51.7	Iraq	64	49	53	114	Rapid Urease Test	Oral Sample	7

A: Exposed cases (the number of patients with H. Pylori in all the PDs patients), B: Exposed non-cases (the number of patients with H. Pylori in the people without PDs), C: Unexposed cases (the number of people without H. Pylori in all the PDs patients), D: Unexposed non-cases (the number of the people without H. Pylori in the people without PDs), NOS: the Newcastle - Ottawa Quality Assessment Scale,

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