Table 2 Sex-stratified age-standardized prevalence ratio and NNS (number needed to screen) by covariates of latent tuberculosis infection
Variable | Total | Male | Female | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
SPR | 95% CI | NNS | SPR | 95% CI | NNS | SPR | 95% CI | NNS | ||||
Total | 1.43 | 1.37 | 1.49 | 4 | 1.55 | 1.47 | 1.63 | 4 | 1.26 | 1.18 | 1.35 | 4 |
Age (years) | ||||||||||||
< 40 | 1.72 | 1.60 | 1.85 | 6 | 1.75 | 1.61 | 1.91 | 6 | 1.65 | 1.43 | 1.89 | 6 |
40+ | 1.32 | 1.25 | 1.38 | 3 | 1.44 | 1.35 | 1.54 | 2 | 1.18 | 1.09 | 1.27 | 3 |
Country of origin | ||||||||||||
High TB burden | 1.44 | 1.38 | 1.51 | 3 | 1.56 | 1.47 | 1.65 | 3 | 1.28 | 1.19 | 1.38 | 3 |
Low-intermediate TB burden | 1.35 | 1.21 | 1.49 | 5 | 1.48 | 1.30 | 1.67 | 5 | 1.15 | 0.96 | 1.36 | 5 |
Visa type | ||||||||||||
Korean diaspora | 1.46 | 1.40 | 1.53 | 3 | 1.63 | 1.53 | 1.73 | 3 | 1.27 | 1.17 | 1.36 | 3 |
Others | 1.31 | 1.19 | 1.43 | 6 | 1.33 | 1.20 | 1.48 | 6 | 1.24 | 1.04 | 1.46 | 5 |
TB history | ||||||||||||
No | 1.42 | 1.36 | 1.48 | 4 | 1.53 | 1.45 | 1.62 | 4 | 1.25 | 1.17 | 1.34 | 4 |
Yes | 2.30 | 1.67 | 3.09 | 2 | 2.74 | 1.83 | 3.93 | 2 | 1.79 | 1.00 | 2.95 | 2 |
Duration of stay (years) | ||||||||||||
< 1 | 1.39 | 1.29 | 1.49 | 4 | 1.53 | 1.39 | 1.68 | 4 | 1.25 | 1.11 | 1.39 | 4 |
1–4 | 1.46 | 1.35 | 1.57 | 4 | 1.54 | 1.40 | 1.68 | 4 | 1.32 | 1.15 | 1.51 | 3 |
≥ 5 | 1.44 | 1.35 | 1.54 | 3 | 1.57 | 1.44 | 1.71 | 3 | 1.26 | 1.13 | 1.41 | 3 |