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Table 6 Literature studies

From: Variability and accuracy of multiple saliva pepsin measurements in laryngopharyngeal reflux patients

Authors

Ref

Years

LPR/CT

LPR diagnosis

Sample time

Pepsin analysis

Thresholds

SE

SP

PPV

NPV

Accuracy

Wang

10

2022

112/26

HEMII-pH

From morning

Rapid pepsin

> 45 ng/mL

38.4

84.6

91.5

24.2

55.7

China

   

≥ 1 HRE

07:00:00 to

lateral flow

Fasting test

     
     

6:00 PM

Highest saliva

> 45 ng/mL

86.6

80.8

95.1

58.3

73.9

      

concentration

Highest test

     

Zelenik

9

2021

45/1

HEMII-pH

Morning

PepTest®

≥ 16 ng/mL

48.0

27.0

63.0

40.0

48.0

Czech

   

> 1 HRE

        

Zhang

7

2020

26/4

HEMII-pH

Morning

PepTest®

≥ 16 ng/mL

76.9

25.0

87.0

14.3

87.0

Australia

   

≥ 2 HRE

1-h post-lunch

 

≥ 75 ng/mL

57.7

75.0

93.8

21.4

N.P

    

≥ 6 PRE

1-h post-dinner

       
     

When symptoms

       

Klimara

2

2019

19/7

HEMII-pH

Morning

ELISA

> 1 ng/mL

29.4

50.0

62.5

20.0

42.0

U.S.A

   

> 1 HRE

1-h post-lunch

Western blot

      
    

> 40 PRE

1-h post-dinner

Higesth pepsin

      
     

1-h post-breakfast

concentration

      

Weitzendorfer

15

2019

41/29

Restech

3 samples

PepTest®

> 16 ng/mL

85.4

27.6

62.5

57.1

85.4

Austria

   

Ryan score

 

Highest of

> 50 ng/mL

78.1

41.4

65.3

57.1

 
    

(> 9.4)

 

3 samples

> 100 ng/mL

68.3

58.6

70.0

56.7

 
       

> 150 ng/mL

53.7

69.0

71.0

51.3

 
       

> 216 ng/mL

41.5

86.2

81.0

51.0

 

Hayat

6

2015

111/100

MII-pH

Morning

PepTest®

> 16 ng/mL

77.6

63.2

58.4

80.4

N.P

U.K

   

EAT > 4.2%

1-h post-lunch

 

> 50 ng/mL

67.2

76.3

67.2

76.8

 
     

1-h post-dinner

 

> 100 ng/mL

51.7

74.5

54.5

72.3

 
       

> 150 ng/mL

41.4

90.8

75.0

69.9

 
       

> 210 ng/mL

44.2

96.3

95.7

36.5

 

Ocak

16

2015

18/2

Dual-probe

N.P

PepTest®

≥ 16 ng/mL

33.0

100

100

14.2

N.P

Turkey

   

pH testing

        
    

EAT > 4.2%

        

Saritas

17

2012

22/25

Wireless

N.P

PepTest®

≥ 50 ng/mL

50.0

92.0

85.0

68.0

N.P

U.S.A

   

pH testing

        
    

EAT > 4.2%

        

Potluri

18

2003

3/13

Dual-probe pH testing

When symptoms

Pepsin assay

> 1 ng/mL

100

92.3

N.P

N.P

N.P

U.S.A

   

≥ 1 proximal acid

        
    

esophageal event

        
  1. EAT, esophageal acid exposure time; (HE)MII-pH, hypopharyngeal–esophageal multichannel-intraluminal impedance-pH monitoring; HRE, hypopharyngeal reflux event(s); LPR/CT, laryngopharyngeal reflux/controls; NP, not provided; NPV, negative predictive value; PPV, positive predictive value; PRE, proximal esophageal reflux event(s); ref., reference; SE, sensitivity; SP, specificity