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Table 5 Multivariate analysis of risk factors associated with a TST ≥ 15 mm

From: Screening for latent tuberculosis in Norwegian health care workers: high frequency of discordant tuberculin skin test positive and interferon-gamma release assay negative results

  Univariate (n = 384) Multivariate (n = 53)
Characteristics OR (95% CI) P-value OR (95% CI) P-value
Female 0.34 (0.08, 1.47) .148 0.27 (0.06, 1.21) .088
Age 1.01 (0.98, 1.05) .413 1.02 (0.98, 1.05) .382
Origin 1.66 (0.36, 7.69) .519 1.16 (0.19, 7.16) .871
Stay in TB endemic country 0.86 (0.38, 1.92) .705 0.42 (0.12, 1.55) .193
Exposure to TB 0.79 (0.34, 1.84) .588 0.79 (0.33, 1.90) .598
  1. OR; odds ratio; CI; confidence interval; OR per standard-deviation increase for continuous variables Age; Origin; country of birth, divided into three groups, 1) Norway, 2) other TB low- endemic countries, 3) TB endemic countries; Stay in TB endemic country; stayed and/or worked in TB endemic country (>2 weeks); Exposure to TB; exposed to TB at work, either in direct contact with patients or in a laboratory.