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Table 1 Basic characteristics of included studies

From: Elevated level of nerve growth factor in the bladder pain syndrome/interstitial cystitis: a meta-analysis

Author

Year

Region

Sample size

Outcome

Study design

Quality

BPS/IC

Control

Hsin-Tzu Liu

2012

Taiwan

30

28

Urinary NGF, NGF/Cr

Compared

6

Pradeep Tyagi

2012

USA

10

10

Urinary NGF

Compared

5

Mehmet Baykara

2003

Turkey

9

7

Urinary NGF

Compared

5

Hsin-Tzu Liu

2007

Taiwan

19

19

Urinary NGF

Compared

6

Hsin-Tzu Liu

2009

Taiwan

58

28

Urinary NGF, NGF/Cr

Compared

5

Chia-Yen Chen

2010

Taiwan

28

28

Urinary NGF, NGF/Cr

Compared

6

Chia-Yen Chen

2010

Taiwan

28

28

Urinary NGF, NGF/Cr

Compared

6

Shiu-Dong Chung

2011

Taiwan

22

33

Urinary NGF, NGF/Cr

Compared

5

Shiu-Dong Chung

2011

Taiwan

22

33

Urinary NGF, NGF/Cr

Compared

5

Mathieu Boudes

2011

Belgium

6

5

Urinary NGF

Compared

5

Yuan-Hong Jiang

2013

Taiwan

30

26

Urinary NGF

Compared

5

Yuan-Hong Jiang

2014

Taiwan

33

45

Urinary NGF, NGF/Cr

Compared

5

  1. NGF nerve growth factor, NGF/Cr ratio of nerve growth factor and creatinin