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Table 1 Characteristics of included articles

From: Imaging features of the PI-RADS for predicting extraprostatic extension of prostate cancer: systematic review and meta-analysis

Author (Ref.)

Study design

Period of recruitment

Nation

No. of patient

No. of patient with EPE (%)

Patient age, years*

PSA, ng/mL*

Unit for analysis

MRI magnet

Endorectal coil

Anti-peristaltic agent

MRI sequence†

No. of readers (year of experience)

Clarity of blinding review

Ahn H [24]

Retrospective

2011–2016

Korea

221

69 (31.2)

67.2 (range, 45–78)

16.7 ± 17.4

Per patient

3.0-T

No

Yes

mpMRI (T2WI)

2 (19, 3)

Blinded

Alessi S [25]

Retrospective

2012–2013

Italy

301

119 (39.5)

63.15 ± 6.96

8.66 ± 7.94

Per patient

1.5-T

No

NA

mpMRI (NA)

2 (3, 2)

Blinded

AsfuroÄŸlu U [26]

Retrospective

2016–2019

Turkey

79

33 (41.8)

64.5 ± 6.2

9.9 ± 7.4

Per patient

3.0-T

No

NA

mpMRI (T2WI)

2 (10, 4)

Blinded

Beyersdorff D [27]

Prospective

NA

Germany

22

5 (22.7)

62 (range, 50–72)

7.5 (range, 2–14)

Per patient

3.0-T and 1.5-T

No (3.0-T) Yes (1.5-T)

Yes

T2WI, T1WI (NA)

2 (NA)

Blinded

Boesen L [28]

Prospective

2011–2013

Denmark

87

31 (35.6)

65 (range, 47–74)

11 (range, 4.6–45)

Per patient

3.0-T

No

Yes

mpMRI (T2WI)

2 (2, NA)

Blinded

Chen Y [29]

Retrospective

2009–2015

China

353

196 (55.5)

65.9

15.0

Per lobe

3.0-T or 1.5-T

No

NA

mpMRI (NA)

2 (NA)

Unclear

Christophe C [30]

Retrospective

2015–2018

France

92

38 (41.3)

63 (59–67)

PSA density 0.24 (0.15‒0.32)

Per patient

3.0-T

No

Yes

mpMRI (T2WI)

3 (15, 1.5, 1)

Blinded

Costa DN [31]

Retrospective

2015–2016

USA

80

40 (50)

64 ± 8

8.0 ± 6.1

Per patient

3.0-T

Yes

NA

mpMRI (T2WI, ADC map)

5 (NA)

Blinded

Gatti M [32]

Retrospective

2015– 2020

Italy

276

122 (44.2)

Site1: 66 (60–71), Site 2: 67 (62–70)

Site1: 7 (5–10), Site 2: 7 (6–10)

Per patient

1.5-T

No

Yes

mpMRI (NA)

4 (≥ 500 cases analyzed)

Blinded

Gaunay GS [33]

Retrospective

2012–2014

USA

74

24 (32.4)

NA

NA

Per patient

3.0-T

Yes

NA

mpMRI (NA)

1 (fellowship trained radiologist)

Unclear

Matsuoka Y [34]

Retrospective

2007–2015

Japan

210

56 (26.7)

67 (range, 50–81)

7.0 (range, 2.9–30.0)

Per patient

1.5-T

No

NA

mpMRI (T2WI)

2 (10, 5)

Blinded

Mehralivand S [15]

Prospective

2007–2017

USA

553

125 (22.6)

60 ± 8

6.28 (range, 0.21–170)

Per patient

3.0-T

Yes

NA

mpMRI (NA)

1 (15, 9)

Blinded

Onay A [35]

Retrospective

2012–2017

Turkey

110

26 (23.6)

62.7 (range, 40–77)

7.4 (range, 2.1–40)

Per patient

3.0-T

No

Yes

mpMRI (T2WI)

2 (12, 5)

Blinded

Park KJ [16]

Retrospective

2016–2017

Korea

301

129 (42.9)

65 ± 7

7.55 ± 5.62

Per patient

3.0-T

No

Yes

mpMRI (T2WI, DWI, DCE)

2 (> 15, 3)

Blinded

Rosenkrantz AB [36]

Retrospective

NA

USA

90

40 (44.4)

64 ± 8

9.0 ± 11.4

Per lobe

3.0-T

No

NA

mpMRI (T2WI)

2 (4,1)

Blinded

Valentin B [37]

Retrospective

2016–2017

Germany

136

60 (44.1)

67 (62–72)

9.3 (7.0–14)

Per patient

3.0-T

No

Yes

mpMRI (NA)

3 (10, 5, 2)

Unclear

Yu KK [38]

Retrospective

1992–1995

USA

77

34 (44.2)

62.6 ± 7.6

10.7 ± 1.7

Per patient

1.5-T

Yes

Yes

T1WI, T2WI (NA)

3 (≥ 6 months)

Blind

  1. Articles are listed in alphabetical order of the names of the first authors
  2. EPE, extraprostatic extension; PSA, prostate-specific antigen; MRI, magnetic resonance imaging; mpMRI, multiparametric MRI; T2WI, T2-weighted imaging; NA, not available; T1WI, T1-weighted imaging; ADC, Apparent diffusion coefficient; DWI, diffusion-weighted imaging; DCE, dynamic contrast-enhanced imaging
  3. *Unless otherwise specified, data are mean or median value, with standard deviation or interquartile range in parenthesis
  4. †The parentheses are MRI sequences for evaluating EPE features