Table 3.

Risk factors for a positive TST in dialysis patients (n = 83)

Risk Factor	Crude OR	95% CI	P	Adjusted ORa	95% CI	P
Age, years
<50	1.00			1.00
50 to 59	0.95	0.25 to 3.58	0.95	0.76	0.18 to 3.13	0.70
60 to 69	0.55	0.15 to 1.96	0.35	0.56	0.14 to 2.23	0.41
≥70	0.27	0.06 to 1.18	0.08	0.16	0.03 to 0.84	0.03
Gender, male	0.78	0.31 to 1.94	0.59	0.98	0.35 to 2.75	0.98
BCG vaccination	1.29	0.50 to 3.27	0.60	0.78	0.23 to 2.64	0.70
Diabetes mellitus	1.24	0.44 to 3.53	0.68	1.62	0.42 to 6.29	0.49
Malnutrition with BMI < 20	0.63	0.23 to 1.77	0.39	0.44	0.13 to 1.46	0.18
Dialysis vintage, years
<4	1.00			1.00
4 to 9	0.31	0.09 to 1.05	0.06	0.25	0.06 to 0.96	0.04
≥10	0.82	0.24 to 2.81	0.75	0.62	0.16 to 2.37	0.49
Past TB disease	0.62	0.13 to 2.95	0.54	1.03	0.18 to 6.03	0.97
Evidence of past TB on chest x-ray	0.40	0.07 to 2.32	0.31	0.60	0.08 to 4.49	0.62
QGIT positive	1.94	0.75 to 5.02	0.18	2.33	0.73 to 7.43	0.15

^aAdjusted for age, gender, and dialysis vintage. A positive TST was defined as a two-step TST with a 10-mm cutoff.