Table 4. Association between the degree of immunodeficiency and tuberculosis with an allopatric Mycobacterium tuberculosis strain among European patients (n = 233).

Degree of immunodeficiency	n	Unadjusted			Adjusted
		OR	95% OR	P value	OR	95% OR	P value
Nadir CD4 T cell count (CD4 cells/µl)				<0.0001			0.0050
HIV–negative	197	1.0	(ref)		1.0	(ref)
≥200	11	4.64	(0.87–24.70)		2.56	(0.37–17.65)
50–199	17	6.43	(1.74–23.70)		6.96	(1.18–41.11)
<50	8	12.53	(2.58–60.84)		13.0	(1.54–109.75)

Model was adjusted for age, sex, Swiss-born, frequent travelling, contact with foreign-born population, and immunosuppression other than HIV infection (see Figure 2 for a graphical overview).

P values of linear tests for trend are shown.