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Table 2 Results of multinomial regression models for discordant TSPOT.TB and tuberculin skin test at baseline

From: Predictors of discordant latent tuberculosis infection test results amongst South African health care workers

Risk Factor

Positive TST and negative

TSPOT.TB test result

Negative TST and positive

TSPOT.TB test result

OR (95% CI) N = 126

Adjusted

OR (95% CI) N = 20

Adjusted

Older age, per each additional year

0.97 (0.95–0.99) **

0.97 (0.94–0.99)*

1.00 (0.96–1.04)

1.07 (1.01–1.13)*

Male gender

0.93 (0.58–1.50)

0.72 (0.43–1.21)

1.22 (0.45–3.29)

1.46 (0.45–4.75)

BCG Vaccination scar

1.42 (0.82–2.46)

1.92 (1.02–3.63) *

1.07 (0.34–3.32)

1.04 (0.26–4.17)

HIV Positive/reported as positive

1.03 (0.50–2.11)

0.88 (0.37–2.05)

4.72 (1.64–13.59) **

4.44 (1.14–17.27)*

Previous TB Treatment

0.88 (0.46–1.68)

1.02 (0.48–2.17)

3.00 (1.09–8.28)*

1.33 (0.35–5.10)

Symptom screen positive

1.05 (0.65–1.68)

1.03 (0.60–1.75)

2.95 (1.18–7.35) *

1.94 (0.64–5.86)

Years in healthcare

0.98 (0.96–1.0)

1.00 (0.97–1.03)

CI (0.88 - 0.99)*

0.92 (0.85–0.99)*

Home-care

0.32 (0.11–0.94) *

0.32 (0.10–0.95) *

1.74 (0.48–6.30)

0.63 (0.11–3.56)

Daily contact with TB patient

0.88 (0.45–1.71)

0.94 (0.45–1.98)

2.08 (0.27–16.09)

NC

  1. OR odds ratio, CI confidence interval
  2. *P < 0.05; **P < 0.01; ***P < 0.001