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Table 1 General characteristics of included studies

From: Neutrophil to lymphocyte ratio in parkinson’s disease: a systematic review and meta-analysis

Author

Year

Design

Ethnicity

Parkinson’ disease

Healthy control

SEN

SP

NOS score

N

NLR

N

NLR

Akil

2014

Prospective

Caucasian

51

3.10 ± 1.30

50

2.10 ± 0.32

73

74

7

Ucar

2016

Retrospective

Caucasian

46

2.66 ± 1.05

20

2.46 ± 1.04

  

7

Moghaddam

2018

Prospective

Caucasian

388

2.50 ± 0.90

148

2.20 ± 0.80

  

6

Pekel

2018

Prospective

Caucasian

17

2.32 ± 0.77

21

3.04 ± 1.63

  

8

Solmaz

2018

Not declared

Caucasian

101

3.07

60

2.17

65

75

7

Jiang,S.

2019

Retrospective

East Asian

116

1.87 ± 0.71

99

1.67 ± 0.61

  

8

Kenangil

2019

Not declared

Caucasian

94

2.20 ± 1.13

97

2.18 ± 0.96

  

8

Yazar

2019

Not declared

Caucasian

211

2.28 ± 0.55

200

1.71 ± 0.50

  

8

Jin

2020

Retrospective

Caucasian

183

2.91 ± 1.74

89

3.00 ± 1.50

  

7

Munoz-Delgado

2021

Retrospective

Caucasian

377

2.47 ± 1.10

355

1.98 ± 0.91

  

8

Liu

2021

Retrospective

East Asian

101

2.59 ± 0.87

97

2.02 ± 0.76

49

83

6

Kara

2021

Retrospective

Caucasian

100

2.40 ± 0.10

61

1.90 ± 0.10

70

62

8

Wang2

2021

Retrospective

East Asian

453

8.47 ± 2.74

436

9.03 ± 2.91

  

6

Contaldi

2022

Prospective

Caucasian

58

2.63 ± 1.15

58

2.23 ± 0.78

69

48

7

Jiang,L.

2022

Retrospective

Caucasian

125

2.09 ± 0.89

124

2.04 ± 0.77

  

7

Madetko

2022

Retrospective

Caucasian

98

2.26 ± 1.12

99

1.76 ± 0.71

  

8

Paul

2022

Prospective

Caucasian

562

3.02 ± 1.60

227

2.16 ± 1.20

  

8

Wang1

2022

Retrospective

East Asian

153

2.89 ± 0.15

36

2.00 ± 0.16

  

8

Xing

2022

Prospective

East Asian

69

2.83 ± 2.91

36

1.98 ± 0.86

  

7

Munoz-Delgado

2023

Retrospective

Caucasian

281

2.56 1.16

174

2.18 0.79

  

7

 N:Number; NLR: Neutrophil to lymphocyte ratio