Table 1 Study characteristics.

From: Hemoglobin as a prognostic marker for neurological outcomes in post-cardiac arrest patients: a meta-analysis

Author

Year

Country

Race

Geographic location

Inclusion period

Study type

Sample size, CA type

PNO,n (%)

hemoglobin sampling time

Outcome measurement

NOS

Assessment tool

Time point

SOS-KANTOstudy group

2012

Japan

Yellow

Asia

2002–2003

mPOS

137,OHCA

103(75)

hospital arrival

CPC(1–2)34 CPC(3–5)103

1 month

5

Aiham Albaeni

2016

USA

White

North America

2004–2010

sROS

146,OHCA

116(79)

ROSC

CPC(1–2)30 CPC(3–5)116

4

K. Ameloot

2015

Belgium

White

Europe

sROS

82,CA

39

admission

CPC(1–2)7/21(33%) CPC(3–5)36/61(59%)

6 month

5

Federica Zama Cavicchi

2020

Belgium

White

Europe

2007–2015

sRos

414,OHCA231 + IHCA

257

admission

CPC(1–2)157 CPC(3–5)257

3 month

7

Andrew Wormsbecker

2017

Canada

White

North America

2009–2014

sRos

118,OHCA + IHCA

86

Average hemoglobin

CPC(1–2)32 CPC(3–5)86

Hospital discharge

7

Chih-Hung Wang

2016

China

Yellow

Asia

2006–2012

sRos

426IHCA

372

Average hemoglobin

CPC(1–2)54 CPC(3–5)372

Hospital discharge

5

Se Jong Oh

2018

Korea

Yellow

Asia

2007–2013

sROS

295OHCA

216

hospital arrival

CPC(1–2)79 CPC(3–5)216

6 month

5

Young Mo Cho MD

2012

Korea

Yellow

Asia

2007–2010

sROS

117OHCA

83

hospital arrival

CPC (1–2) 34 CPC(3–5)83

1 month

6

Kei Hayashida

2014

Japan

Yellow

Asia

2011–2013

mPOS

495OHCA

420

hospital arrival

CPC (1–2) 75 CPC(3–5)420

3 month

9

Adrien Bouglé

2016

France

White

Europe

2012–2013

sPOS

43OHCA

21

Average hemoglobin

CPC (1–2) 22 CPC(3–5)21

Hospital discharge

7

Daesung Kim

2018

Korea

Yellow

Asia

2009–2015

sROS

246OHCA

159

ROSC

CPC (1–2) 87 CPC(3–5)159

Hospital discharge

5

  1. CA: cardiac arrest, PNO: poor neurologic outcome, OHCA: out-of-hospital cardiac arrest, h: hour, IHCA: in-hospital cardiac arrest, CPC: cerebral performance categories, sPOS: single-center prospective observational study, sROS: single-center retrospective observational study, mPOS: multi-center prospective observational study, ROSC: recovery of spontaneous circulation, NOS: Newcastle–Ottawa Scale.