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Table 3 Diagnostic agreement between any of the two methods (FECT, STST, BCT, APC, RT-PCR) used for the detection of S. stercoralis from stool specimens

From: Evaluation of five diagnostic methods for Strongyloides stercoralis infection in Amhara National Regional State, northwest Ethiopia

Methods

Kappa value (95% CI)

NOA N, (%)

NAEC N, (%)

SEK

χ2, p-value

 

Pos

Neg

RT-PCR

FECT

 Pos

8

9

0.025 (0.009–0.059)

600 (71.1)

593.8 (70.35

0.017

2.8, 0.083

 Neg

235

592

     

STST

 Pos

14

20

0.033 (0.011–0.076)

595 (50.5)

586.6 (69.5)

0.022

2.65, 0.078

 Neg

229

581

     

BCT

 Pos

34

209

0.031 (0.003–0.124)

582 (69.0)

564.1 (66.8)

0.031

0.50, 0.019

 Neg

53

548

     

APC

 Pos

31

61

0.032 (0.027–0.091)

571 (67.7)

562.0 (66.6)

0.030

1.2, 0.271

 Neg

212

540

     
 

APC

     

FECT

 Pos

12

5

0.193 (0.093–0.292)

759 (89.93)

738.7 (87.52)

0.051

63.6, 0.000

 Neg

80

747

     

STST

 Pos

21

13

0.292 (0.185–0.398)

760 (90.1)

725.4 (86.0)

0.054

94.4, 0.000

 Neg

71

739

     

BCT

 Pos

64

23

0.680 (0.599–0.763

793 (94.0)

684.0(81.0)

0.042

392.2, 0.000

 Neg

28

729

     
 

BCT

     

FECT

 Pos

13

4

0.251 (0.136–0.367

759 (91.8)

736.2(89.0)

0.059

82.1, 0.000

 Neg

74

753

     

STST

 Pos

23

11

0.342 (0.231–0.453)

769 (91.1)

730.0 (86.49)

0.057

126.0, 0.000

 Neg

64

746

     
 

STST

     

FECT

 Pos

10

7

0.375 (0.204–0.547)

813 (96.3)

794.4 (94.1)

0.088

134.7; 0.000

 Neg

24

803

     
  1. NOA number of observed agreements, NAEC number of agreements expected by chance, SEK standard error of Kappa, Pos positive, Neg negative