Table 2

Stratified analysis of the sensitivity and specificity of cholera dipstick test according to specimen (bulk stool or enriched rectal swab) and treatment (intravenous fluids or no intravenous fluids)

Dipstick test

Bacteriological culture

Total


Positive

Negative


IV treatment – enriched rectal swab a

Positive

45

3

38

Negative

0

40

40

Total

45

43

78


IV treatment – bulk stool b

Positive

57

10

67

Negative

2

31

33

Total

59

41

100


No IV treatment – enriched rectal swab c

Positive

19

1

20

Negative

2

109

111

Total

21

110

131


No IV treatment – bulk stool d

Positive

10

13

23

Negative

3

46

49

Total

13

59

72


NOTE: IV = intravenous fluids were given.

a Sensitivity was 100%; specificity was 93% (85–100); positive predictive value was 94%; and Kappa value was 0.93 (p < 0.05).

b Sensitivity was 97% (92–100%); specificity was 76% (62–89%); positive predictive value was 85%;and Kappa value was 0.74 (p < 0.05).

c Sensitivity was 91% (78–100%); specificity was 99% (97–100%); positive predictive value was 95%;and Kappa value was 0.91 (p < 0.05).

d Sensitivity was 77% (54–100%); specificity was 78% (67–89%); positive predictive value was 43%;and Kappa value was 0.42 (p < 0.05).

Wang et al. BMC Infectious Diseases 2006 6:17   doi:10.1186/1471-2334-6-17

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