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Table 2 Correlation between sleep indicators and cystatin C level

From: Association between elevated cystatin C levels and obstructive sleep apnea hypopnea syndrome: a systematic review and updated meta-analysis

Author

Year

Cystatin C

Pearson/Spearman correlation coefficients

Case

N

Kato K

2011

0.82 ± 0.13

mg/L

267

A

Zhang XB (Mild)

2013

0.80 ± 0.11

mg/L

15

A. B

Zhang XB (Moderate)

2013

0.81 ± 0.17

mg/L

24

A. B

Zhang XB (Severe)

2013

0.87 ± 0.12

mg/L

36

A. B

Hou TT

2016

1.06 ± 0.29

mg/L

55

A

Voulgaris A

2018

1155.2 ± 319.3

ng/mL

64

B. C. D

Chuang LP

2019

 

mg/L

67

A. B

Nowicki M

2020

431 ± 252

ng/g

86

A

Nowinski A

2020

 

mg/L

240

A

Li JH

2022

 

mg/L

1107

A. B. C. D

Jiang Q (Mild)

2016

0.89 ± 0.11

mg/L

49

A. C. D

Jiang Q (Moderate)

2016

0.89 ± 0.11

mg/L

56

A. C. D

Jiang Q (Severe)

2016

0.98 ± 0.14

mg/L

92

A. C. D

  1. A: correlation coefficient between Cystatin C concentrations and AHI
  2. B: correlation coefficient between Cystatin C concentrations and ODI
  3. C: correlation coefficient between Cystatin C concentrations and Mean SaO2
  4. D: correlation coefficient between Cystatin C concentrations and Minimum SaO2