Risk factors for tuberculosis after gastrectomy in gastric cancer

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

¹Significantly higher than expected at the 5% level. New TB case notification rates in 2008 were used for estimation of expected TB cases. TB: Tuberculosis.