Table 4

Multivariate Analysis, using Conditional Logistic Regression to evaluate Risk Factors for a Positive Diagnostic Test for Latent Tuberculosis Infection

Risk factors for positive TST

Odds Ratio

95% Confidence Interval


Age < 32 years

0.98

0.36-2.62

Male Gender

1.33

0.79-2.22

HIV negative*

Age < 32 years

Age ≥ 32 years

1.86

3.67

1.06-2.67

1.60-8.39

Risk factors for positive QFT

Odds Ratio

95% Confidence Interval

Age < 32 years

0.56

0.24-1.36

Male Gender

0.92

0.55-1.53

HIV negative

2.22

1.42-3.46

Risk factors for positive TSPOT

Prevalence Ratio

95% Confidence Interval

Age < 32 years

0.98

0.42-2.28

Male Gender

1.59

0.92-2.76

HIV negative

1.79

1.16-2.77


*Interaction between age and HIV

TST: Tuberculin Skin Test

QFT: Quantiferon-TB Gold In Tube Test

TSPOT: TSPOT.TB Test

HIV: Human Immunodeficiency Virus

Talati et al. BMC Infectious Diseases 2011 11:264   doi:10.1186/1471-2334-11-264

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