Table 3

Sensitivity and specificity of HIV testing on sputum without CPC, comparing split and unsplit specimens

HIV serum ELISA (Standard)


HIV on sputum

Positive

Negative

Sensitivity (95% CI)

Specificity (95% CI)


Split specimens

Day 4

93.3% (86.7–97.3%)

73.7% (66.7–79.8%)

Positive

98

51

Negative

7

135

Total

105

186

Day 7

93.3% (86.6–97.3%)

59.3% (50.8–67.4%)

Positive

97

59

Negative

7

86

Total

104

145

Unsplit specimens

Day 4

92.6% (75.7–99.1%)

87.3% (75.5–94.7%)

Positive

25

7

Negative

2

48

Total

27

55

Day 7

91.3% (72.0–98.9%)

72.9% (58.2–84.7%)

Positive

21

13

Negative

2

35

Total

23

48


Egwaga et al. BMC Clinical Pathology 2007 7:8   doi:10.1186/1472-6890-7-8

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