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Volume 19, Number 9—September 2013
Research

High Rates of Mycobacterium tuberculosis among Socially Marginalized Immigrants in Low-Incidence Area, 1991–2010, Italy

Iacopo BaussanoComments to Author , Silvio Mercadante, Manish Pareek, Ajit Lalvani1, and Massimiliano Bugiani1
Author affiliations: International Agency for Research on Cancer, Lyon, France (I. Baussano); UPO “A.Avogadro” and CPO–Piemonte, Novara, Italy (I. Baussano, S. Mercadante); Imperial College, London, UK (M. Pareek, A. Lalvani); Regional Reference Centre for Tuberculosis Prevention, Turin, Italy (M. Bugiani)

Main Article

Table 2

Distribution and prevalence/rate of TB and LTBI cases, and LTBI conversions*

 TB
LTBI
Variable No. cases/population at risk Prevalence, % (95% CI) No. cases/population at risk Prevalence, % (95% CI) No. cases/p-y at risk Conv. rates, % (95% CI)
Total 744/27,358 2.7 (2.5–2.9) 9,180/26,554 34.6 (34.0–35.1) 90/5,241 1.7 (1.4–2.1)
Sex
F 254/11,116 2.3 (2.0–2.6) 3,663/10,849 33.8 (32.9–34.7) 46/2,462 1.9 (1.4–2.5)
M 490/16,242 3.0 (2.8–3.3) 5,517/15,705 35.1 (34.4–35.9) 44/2,777 1.6 (1.2–2.1)
Age, y, at test
<20 30/2,498 1.2 (0.8–1.7) 405/2,465 16.4 (15.0–17.9) 4/245 1.6 (0.1–4.3)
20–29 190/10,705 1.8 (1.5–2.0) 3,163/10,500 30.1 (29.2–31.0) 26/1,436 1.8 (1.2–2.7)
30–39 253/8,659 2.9 (2.6–3.3) 3,480/8,382 41.5 (40.5- 42.6) 41/2,301 1.8 (1.3–2.4)
>40 271/5,414 5.0 (4.4–5.6) 1,889/4,671 40.4 (39.0–41.9) 19/1,258 1.5 (1.0–2.4)
TB incidence (cases/105 p-ys) in immigrant’s country of origin
<25 4/679 0.6 (0.2–1. 6) 111/674 16.5 (13.9–19.5) 1/74 1.3 (0.2–9.6)
25–49 56/3,500 1.6 (1.2–2.1) 1,008/3,440 29.3 (27.8–30.8) 6/814 0.7 (0.3–1.6)
50–99 48/1,668 2.9 (2.2–3.8) 407/1,615 25.2 (23.1–27.4) 3/311 1.0 (0.3–3.0)
100–299 602/20,050 3.0 (2.8–3.2) 7,196/19,400 37.1 (36.4–37.8) 74/3,764 2.0 (1.6–2.5)
>300 34/1,461 2.3 (1.7–3.2) 458/1,425 32.1 (29.8–34.6) 6/278 2.1 (1.0–4.8)

*TB, tuberculosis; LTBI, latent TB infection; p-y, person years; conv., conversion.

Main Article

1Joint senior authors who contributed equally to this article.

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Page updated: August 20, 2013
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