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Table 1 The characteristics of the included studies

From: Prognostic nutritional index as a predictive marker for acute kidney injury in adult critical illness population: a systematic review and diagnostic test accuracy meta-analysis

Study

Year of data collection

Study design

Country

Location

Enrolled participants

Mean age

%,

Female

Excluded CKD#

AKI definition

AKI judgement timing

PNI cut-off value

PNI

measure time

Mean serum albumin (g/L)

Aykut, 2022

2019 to 2020

Retrospective

Turkey

Single-center

On-pump CABG

61

17.8%

Excluding

KDIGO

1 wk post-OP

< 48

pre-OP

4.2

Dolapoglu, 2019

2015 to 2018

Retrospective

Turkey

Single-center

On-pump CABG

64

25.0%

Excluding

AKIN

Within 48 h post-OP

46.5

Pre-OP

3.7

Efe, 2021

NR

Retrospective

Turkey

NR

Chronic CAD

69

36.7%

Excluding

ESUR

72–96 h post-PCI

≤ 38

pre-PCI

3.1

Gucu, 2021

2016 to 2020

Retrospective

Turkey

Single-center

On-pump CABG

64

40.6%

Excluding

KDIGO

48 h post-OP

< 42.9

Pre-OP

3.8

Han, 2021

2010 to 2018

Retrospective

Korea

Single-center

PCI

65

28.4%

Including

KDIGO

Within 48 h post-PCI

< 47.8

Pre-PCI

4.2

Hatem, 2023

2019

Retrospective

Turkey

Single-center

Non-STEMI with PCI

62

27.1%

Excluding

≧ 25% or 0.3 mg/dL increase in baseline serum creatinine levels

Within 48–72 h Post-PCI

< 48.5

Pre-PCI

NR

Hu (test), 2021

NR

Retrospective

MIMIC III

Multi-center

CCU

67

59.2%

Including

KDIGO

Within 7 days post admission

< 48.8

1st day of admission

3.3

Hu (validation), 2021

2014 to 2015

Retrospective

China

Single-center

CCU

66

67.2%

Including

KDIGO

Within 7 days post admission

< 45.7

1st day of admission

3.7

Jing, 2021

2019

Retrospective

China

Single-center

Operation with CPB but not CABG

52

54.1%

Excluding

AKIN

Within 48 h post-OP

NR

Pre-OP

4.5

Kurtul, 2021

2017 to 2020

Retrospective

Turkey

Two-center

STEMI with PCI

58

24.0%

Excluding

ESUR

Within 72 h post-PCI

< 38

Pre-PCI

 

Lee, 2019

2013 to 2016

Retrospective

Korea

Single-center

Cardiac surgery

59

43.0%

Including

Creatinine elevation of twofold the immediate preoperative value or the new requirement for renal replacement therapy

1 wk post-OP

≤ 46.13

Pre-OP

3.9

Li, 2022

2009 to 2019

Retrospective

China

Multi-center

PCI

67

34.0%

Excluding

ESUR

within 72-h

< 41.4

Pre-PCI

3.9

Min, 2020

2011 to 2018

Retrospective

Korea

Single-center

Living donor liver transplant

52

28.8%

Excluding

AKIN

1 wk post-OP

< 25

pre-OP

3.7

Shimoyama, 2021

2017 to 2019

Prospective

Japan

Single-center

Sepsis

74

38.6%

Including

KDIGO-3 (dialysis-requiring AKI)

2,3,5 day after ICU admission

< 19.51

1st day of ICU

2.3

Shimoyama, 2022

2017 to 2019

Prospective

Japan

Single-center

ICU paitents

75

35.6%

Including

KDIGO

2,3,5 day after ICU admissio

< 26.08

1st day of ICU

2.3

Xie, 2022

2015 to 2021

Retrospective

China

Single-center

Sepsis

58

36.2%

Excluding

KDIGO

As KDIGO criteria

< 32.75

1st day of admission

3.1

Yuksel, 2023

2016 to 2020

Retrospective

Turkey

Single-center

ACS with PCI

63

26.5%

Excluding

ESUR

Not reported

< 48.6

Pre-PCI

4

  1. ACS: acute coronary syndrome; AKIN: Acute Kidney Injury Network; CABG: coronary artery bypass graft surgery; CAD: coronary artery disease; CCU: coronary care unit,; CKD: chronic kidney disease; CPB: cardiopulmonary bypass; ESUR: European Society of Urogenital Radiology; ICU: intensive care unit; KDIGO: Kidney Disease: Improving Global Outcomes; NR: non-reported; OP: operation; PCI: percutaneous coronary intervention;
  2. #For studies that did not mention excluding chronic kidney disease (CKD) populations, or failed to report on this aspect, we categorized them as including CKD populations