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Table 1 Characteristics of included studies

From: Association between irisin and metabolic parameters in nondiabetic, nonobese adults: a meta-analysis

Study and year

Location

Study design

Sample size

Male/Female

Health status

Blood sample

ELISA kits

Analysis methods

NOS scores

Armandi A 2022 [56]

Italy

Cross-sectional

41

33/8

NAFLD

Plasma

Phoenix Pharmaceuticals

Spearman

8

Tentolouris A 2018 [46]

Greece

Cross-sectional

53

22/31

Healthy Controls

Plasma

Aviscera Bioscience

Univariate linear regression

7

Foda A. A. 2017a [57]

Egypt

Case–control

40

0/40

PCOS

Serum

BioVendor

Pearson

8

Foda A. A. 2017b [57]

Egypt

Case–control

40

0/40

healthy controls

Serum

BioVendor

Pearson

8

Foda A. A. 2019a [58]

Egypt

Case–control

50

0/50

PCOS

Serum

BioVendor

Pearson

6

Foda A. A. 2019b [58]

Egypt

Case–control

50

0/50

PCOS

Serum

BioVendor

Pearson

6

Jameel F 2015 [47]

Australia

Cross-sectional

49

28/21

healthy

Plasma

Adipogen

Spearman

6

Mehrabian S 2016a [59]

Iran

Case–control

26

0/26

Healthy Controls

Serum

Biovendor

Spearman

8

Mehrabian S 2016b [59]

Iran

Case–control

38

0/38

BF % > 30

Serum

Biovendor

Spearman

8

Rashid FA 2020 [60]

Iraq

Case–control

30

30/0

normal Weight group

Serum

Phoenix Pharmaceuticals

Pearson

6

Anastasilakis AD 2014 [33]

Greece

cross-sectional

122

61/61

healthy

Serum

Phoenix Pharmaceuticals

Spearman

8

Gouni-Berthold I 2013 [35]

Germany

Cross-sectional

72

72/0

mild hypercholesterolemia

Plasma

Aviscera Biosciences

Spearman or Pearson

7

Zhu H 2018 [61]

China

Case–control

40

30/10

healthy

Serum

USCN Life Science Inc

Spearman or Pearson

7

Liu JJ 2013 [19]

Singapore

Case–control

60

25/35

Non-diabetic controls

Plasma

USCN Life Science Inc

Pearson

8

  1. NOS Newcastle–Ottawa Scale, NAFLD nonalcoholic fatty liver disease, PCOS polycystic ovary syndrome, BF% body fat percent