Table 6.

Age-specific prevalences of TST positivity and annual risk of infection, 2012^*

Age (years)	n	Prevalence (%)	95% confidence interval	Annual risk of infection (%)	95% confidence interval
5–14	103	16.5	(10.7, 25.5)	1.75	(1.08, 2.77)
15–24	67	34.3	(24.6, 47.8)	2.08	(1.36, 3.07)
25–34	64	60.9	(50.1, 74.2)	3.14	(2.23, 4.24)
35–44	64	62.5	(51.7, 75.6)	2.43	(1.73, 3.27)
45–54	62	79.0	(38.8, 58.2)	3.10	(2.22, 4.09)
≥ 55	68	82.4	(73.8, 91.9)	2.71	(1.97, 3.54)
All	428	52.3	(47.5, 57.2)	2.21	(1.92, 2.53)

^*TST = tuberculin skin test; ARI = annual risk of infection.