Table 3.
Sex-age standardized incidence ratios of tuberculosis in gastrectomy patients
| Subgroup | Gastrectomy patients, n | Sum of observation(patient-years) | Observed TB, n | Expected TB, n | Standardized incidence ratio | 95%CI |
| Sex | ||||||
| Male | 1156 | 4628.0 | 14 | 4.69 | 2.99 | 1.63-5.011 |
| Female | 620 | 2524.5 | 2 | 1.81 | 1.11 | 0.12-4.01 |
| Age | ||||||
| 20-29 | 13 | 57.7 | 0 | 0.05 | - | - |
| 30-39 | 112 | 465.6 | 0 | 0.30 | - | - |
| 40-49 | 343 | 1465.1 | 5 | 0.90 | 5.54 | 1.79-12.931 |
| 50-59 | 490 | 2072.3 | 5 | 1.60 | 3.16 | 1.02-7.381 |
| 60-69 | 557 | 2234.5 | 3 | 2.60 | 1.18 | 0.24-3.43 |
| ≥ 70 | 261 | 857.3 | 3 | 1.90 | 1.62 | 0.33-4.74 |
| Total | 1776 | 7152.5 | 16 | 7.20 | 2.22 | 1.27-3.601 |
1
Significantly higher than expected at the 5% level. New TB case notification rates in 2008 were used for estimation of expected TB cases. TB: Tuberculosis.