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Table 1 Characteristics of studies included in the meta-analysis for 5α-THF/THF

From: 5α-reductase activity in women with polycystic ovary syndrome: a systematic review and meta-analysis

Study

Year

Country

Diagnosis Criteria

Npcos

Ncontrol

Matched factors

BMI

HOMA

5α reductase level (5α-THF/THF)

NOS scores

ANDREW RODIN

1994

UK

NIH

34

18

age, BMI

≥25

NR

NS

6

ANDREW RODIN

1994

UK

NIH

31

27

age, BMI

<25

NR

NS

6

D. Chin

2000

USA

NIH

9

29

age, BMI

<25

NR

5

TASOULA TSILCHOROZIDOU

2003

UK

NIH

18

19

age, BMI

<25

1.29

6

Dimitra A. Vassiliadi

2009

UK

Rotterdam criteria

75

28

BMI

≤25

1.3

5

Dimitra A. Vassiliadi

2009

UK

Rotterdam criteria

103

72

BMI

>25

3.1

5

Michael W. O’Reilly

2014

UK

Rotterdam criteria

86

43

age, BMI

>25

2.3

NS

7

  1. Abbreviations: NIH National Institute of Health criteria, BMI body mass index, NR no reporting, NOS Newcastle-Ottawa Quality Assessment Scale