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Table 1 Characteristics of included studies

From: Association between serum/plasma levels of adiponectin and obstructive sleep apnea hypopnea syndrome: a meta-analysis

Author

Year

Country

N (OG/CG)

Adiponectin Source

Assay approach

NOS

Huang et al. [26]

2004

China

84 (69/15)

Serum

RIA

6

Zhang et al. [8]

2005

China

86 (66/20)

Serum

RIA

6

Wolk et al. [11]

2005

USA

55 (26/29)

Plasma

RIA

7

Sharma et al. [15]

2007

India

80 (40/40)

Plasma

ELISA

7

Ursavas et al. [12]

2010

Turkey

70 (55/15)

Serum

RIA

8

Ebru et al. [16]

2011

Turkey

50 (26/24)

Serum

RIA

7

Öztürk et al. [18]

2012

Turkey

94 (62/32)

Serum

ELISA

6

Sánchez et al. [17]

2012

Spain

41 (21/20)

Plasma

RIA

7

Kritikou et al. [19]

2013

USA

67 (36/31)

Serum

ELISA

7

Hargens et al. [10]

2013

USA

30 (12/18)

Serum

ELISA

8

Mutairi et al. [20]

2014

Kuwait

147 (105/42)

Plasma

ELISA

7

Xu et al. [28]

2014

China

82 (62/20)

Serum

ELISA

7

Wen et al. [27]

2015

China

48 (33/15)

Serum

ELISA

7

Kim et al. [22]

2015

Korea

59 (37/22)

Plasma

RIA

7

Araújo et al. [21]

2015

Brazil

53 (33/20)

Plasma

ELISA

7

Zuo et al. [29]

2016

China

89 (59/30)

Serum

ELISA

6

Lacedonia et al. [23]

2016

Italy

20 (10/10)

Serum

ELISA

7

Yang et al. [30]

2017

China

73 (35/38)

Serum

ELISA

7

Abdel et al. [24]

2017

Egypt

44 (22/22)

Serum

ELISA

7

Chen et al. [25]

2017

China

84 (69/15)

Serum

ELISA

8

  1. OG OSAHS group, CG control group, N sample size, NOS Newcastle-Ottawa scale, ELISA Enzyme linked immunosorbent assay, RIA Radioimmunoassay