Table 4.
The observed numbers and standardized incidence ratio of patients with active TB.
| LTBI (+) | Patients | Follow up duration (y) | Patient-years | Observed | Expected* | SIR | 95% CI |
|---|---|---|---|---|---|---|---|
| Male | 134 | 3.19 | 427.46 | 3 | 0.38 | 7.89 | 1.28–23.04 |
| Female | 121 | 3.89 | 470.69 | 2 | 0.32 | 6.16 | 0.69–22.23 |
| Age (years) | |||||||
| 20–29 | 14 | 2.83 | 39.62 | 1 | 0.03 | ||
| 30–39 | 40 | 2.97 | 118.8 | 0 | 0.08 | ||
| 40–49 | 70 | 4.14 | 289.8 | 1 | 0.19 | ||
| 50–59 | 62 | 3.39 | 210.18 | 3 | 0.18 | ||
| 60–69 | 46 | 3.81 | 175.26 | 0 | 0.21 | ||
| 70–79 | 23 | 2.82 | 64.86 | 0 | 0.15 | ||
| ≥80 | 0 | 0 | 0 | 0 | 0 | ||
| Overall | 255 | 3.52 | 897.60 | 5 | 0.71 | 6.01 | 1.94–14.04 |
| No LTBI | Patients | Follow up duration (y) | Patient-years | Observed | Expected* | SIR | 95% CI |
| Male | 222 | 2.98 | 661.56 | 3 | 0.59 | 5.10 | 1.02–14.89 |
| Female | 225 | 3.00 | 675.00 | 3 | 0.47 | 6.44 | 1.29–18.82 |
| Age (years) | |||||||
| 20–29 | 112 | 2.68 | 300.16 | 1 | 0.25 | ||
| 30–39 | 121 | 2.87 | 347.27 | 1 | 0.23 | ||
| 40–49 | 93 | 3.24 | 301.32 | 1 | 0.20 | ||
| 50–59 | 58 | 3.41 | 197.78 | 2 | 0.17 | ||
| 60–69 | 41 | 2.8 | 114.8 | 0 | 0.14 | ||
| 70–79 | 18 | 3.17 | 57.06 | 1 | 0.13 | ||
| ≥80 | 4 | 4.69 | 18.76 | 0 | 0.06 | ||
| Overall | 447 | 2.99 | 1336.53 | 6 | 1.06 | 5.14 | 1.88–11.18 |
*To estimate ‘expected TB’ the sex and age specific TB patient notifications in 2011 were extrapolated from Korea centers for disease control and prevention. TB,tuberculosis; SIR, standardized incidence ratio; CI, confidence interval.