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Table 1 Characteristics of studies included in meta-analysis

From: Matrix metalloproteinases (MMPs) family gene polymorphisms and the risk of multiple sclerosis: systematic review and meta-analysis

Study author

Year

Country

Ethnicity

Total cases/controls

Sex cases/controls

Genotyping method

Mean age

Cases/Controls

Quality score

MMP9

 Nelissen et al.

2000

Sweden

European

199/146

M = NR

F=NR

PCR-RFLP

NR/NR

6

 Zivkovic et al.

2007

Serbia

European

187/282

M = 67/140

F = 120/142

Touch Down PCR

35.5 ± 10.1/40.8 ± 14.8

7

 Benesova et al.

2008

Czech Republic

European

244/132

M = 63/45

F = 181/87

PCR-SSP

38.4 ± 10.2/35.6 ± 11.7

7

 Mirowska-Guzel et al.

2009

Poland

European

234/190

M = 66/76

F = 168/114

PCR-RFLP

40.09 ± 10.19/40.09 ± 10.19

7

 Fernandes et al.

2009

Brazil

South-American

158/191

M = 41/54

F = 117/137

PCR-RFLP

38.7 ± 13/35.6 ± 9.5

6

 La Russa et al.

2010

Italy

European

243/173

M = 96/107

F = 147/66

PCR-RFLP

41.1 ± 12.2/28.5 ± 9.4

7

 Valado et al.

2017

Portugal

European

169/183

M = 48/63

F = 121/120

PCR-RFLP

41.44 ± 0.84/39.09 ± 0.96

6

 Ibrahim et al.

2019

Egypt

African

50/100

M = 18/NR

F = 32/NR

PCR-RFLP

32.9 ± 8.1/NR

5

 Sabbagh et al.

2019

Iran

Asian

100/105

M = 37/41

F = 63/64

PCR-ARMS

42.89 ± 10.48/46.52 ± 8.90

5

 Sadr et al.

2019

Iran

Asian

170/200

M = 121/142

F = 49/58

PCR-RFLP

33.34 ± 7.91/31.88 ± 9.79

7

MMP3

 Djuric et al.

2008

Serbia

European

184/236

M = NR

F=NR

Touch Down PCR

NR/NR

7

 Rahimi et al.

2016

Iran

Asian

121/106

M = 24/17

F = 97/89

PCR-RFLP

35.3 ± 9.1/34.5 ± 11.4

6

MMP2

 Benesova et al.

2008

Czech Republic

European

240/132

M = 60/45

F = 180/87

PCR-SSP

38.4 ± 10.2/35.6 ± 11.7

7

 Aksoy et al.

2016

Turkey

European

102/102

M = 76/75

F = 26/27

Taq man

36.69 ± 8.33/35.93 ± 8.20

6

 Liutkeviciene et al.

2018

Lithuania

European

26/26

M = NR

F=NR

Taq man

36/34

5