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Table 1 Characteristics of the 14 studies in the meta-analysis

From: The effects of metformin on anti-Müllerian hormone levels in patients with polycystic ovary syndrome: a systematic review and meta-analysis

First Author

Year

Country

PCOS criteria

Age

(Mean±SDPre/Post)

Number (Pre/Post)

BMI

(Mean±SDPre/Post)

Study design

Dose(mg/ day)

Therapymonth

Method

AMH (mean±SD)

Pre

Post

Piltonen

2005

Finland

Rotterdam

21-41

26

18-41

SCT

mean 1500

6

EIA

12.25±2.1

11.4±2.24

Bayrak

2007

USA

NIH

29.5±4.8

10

30.2±4.5

SCT

850

1/4

ELISA

2.82±1.8

2.92±1.6

Carlsen

2009

Norway

Rotterdam

30.6±5.9

20

33.4±7.5

SCT

2550

6

ELISA

15.3±11.5

15.2±12.0

Tomova-a

2011

Bulgaria

Rotterdam

NA

13

33.8±2.76 Vs

SCT

2550

6

ELISA

6.39±1.3

5.36±0.96

31.35±2.80

Tomova-b

2011

Bulgaria

Rotterdam

NA

4

22.08±1.12 Vs

SCT

2550

6

ELISA

4.38±2.31

11.31±1.78

22.08±1.32

Panidis

2011

Greece

NIH

20.53±3.09

15

21.97±1.69 vs

SCT

1700

6

ELISA

9.24±3.70

7.77±2.82

20.75±1.32

Neagu

2012

Romania

AE/PCOS

NA

11

NA

SCT

gradually increase to 2550

2

NA

8.99±0.99

6.28.±0.46

Nascimento

2013

Brazil

Rotterdam

26.3±1

16

29.1±1.7

SCT

1500

2

ELISA

6.99±0.85

5.81±0.78

Grigoryan-a

2014

Russia

Rotterdam

28.7±5.2

18

NA

SCT

1700

6

EIA

8.1±1.8

6.9±1.6

Grigoryan-b

2014

Russia

Rotterdam

28.7±5.2

22

NA

SCT

1700

6

EIA

7.7±1.4

7.9±1.6

Saleh

2015

Iraq

Rotterdam

27.5±1.32

20

30.85±0.95 Vs

SCT

1500

3

ELISA

4.49±0.54

3.03±0.53

29.01±1.01

Foroozanfard

2017

Iran

Rotterdam

25.2±4.2

30

26.2±3.8

SCT

gradually increase to 1500

2

ELISA

10±3.75

7.8±3.7

Wiweko

2017

Indonesia

Rotterdam

28.25±3.99

20

28.02±6.02Vs

SCT

1500

6

Beckman

9.30±5.06

7.47±4.59

27.6±6.13

Coulter gen II

AMH assay

Chhabra

2018

India

Rotterdam

30.03±3

32

NA

SCT

1700

3

NA

11.87±5.6

7.4±3.9

  1. NA not available, NIH National Institutes of Health, SCT self-control trial, SD standard deviation, Pre before metformin, Post after metformin