Table 5. Predictors for being in cluster M among 438 patients with multidrug-resistant TB who were in clusters of >15 patients, Argentina, 2003–2009*.

Characteristic	No. patients	% Patients in M cluster	Unadjusted OR (95% CI)	Adjusted OR (95% CI)†
Age, y, n = 347
16–45	288	50.7	0.9 (0.5–1.6)	1.4 (0.5–4.3)
>45	59	52.5	1	1
Country of birth, n = 302
Argentina	275	51.0	0.7 (0.3–1.6)	0.6 (0.1–2.3)
Other	27	74.1	1	1
HIV status, n = 360
Positive	194	60.3	1.6 (1.0–2.4)	1.4 (0.6–3.3)
Negative	166	49.4	1	1
Previous TB treatment, n = 304
Yes	160	47.5	1.0 (0.7–1.6)	0.8 (0.4–1.8)
No	144	46.5	1	1
Hospital exposure‡
Yes	86	72.1	2.9 (1.7–4.8)	2.6 (1.0–6.8)
No	352	47.2	1	1
Isolate resistant to
>5 drugs	207	88.4	31.5 (18.4–53.9)	22.7 (10.1–50.9)
<5 drugs	231	19.5	1	1

*Boldface indicates significance. TB, tuberculosis; OR, odds ratio.
†Overall model fit p < 0.0001. Hosmer & Lemeshow test p = 0.899, area under the receiver operating characteristic curve 0.854.
‡Previous hospitalization(s), concomitant condition, or health care worker.