Predicting smear negative pulmonary tuberculosis with classification trees and logistic regression: a cross-sectional study

Table 1 Clinical and demographic characteristics of study subjects

	Pulmonary Tuberculosis		Non Pulmonary Tuberculosis
Clinical and Demographic Characteristics*	N	%	N	%	OR	95%CI	p value
Age
≤ 25	50	19.2	28	10.0	4.17	2.14–8.10	<0.01
26–60	186	71.5	195	69.9	2.23	1.32–3.74	<0.01
> 60	24	9.2	56	20.1	1.00	-	-
Sex
Male	171	63.3	183	65.1	1.00	-	-
Female	99	36.7	98	34.9	1.08	0.76–1.53	0.66
Origin
Primary Health Care Unit	192	71. 6	151	53.7	1.00	-	-
Tertiary Health Care Unit	76	28.4	130	46.3	0.46	0.32–0.66	<0.01
Previous PT
Yes	65	24.3	78	27.8	0.84	0.57–1.23	0.36
No	202	75.7	203	72.3	1.00	-	-
Diabetes Mellitus
Yes	18	6.9	20	7.2	0.96	0.49–1.85	0.89
No	243	93.1	258	92.8	1.00	-	-
Alcohol abuse
Yes	51	19.0	62	22.1	0.83	0.55–1.25	0.37
No	217	81.0	218	77.9	1.00	-	-
Close Contact with PT
Yes	121	45.2	112	40.0	1.24	0.88–1.73	0.22
No	147	54.9	168	60.0	1.00	-	-
Smoking
Yes	114	42.2	152	54.1	0.62	0.44–0.87	<0.01
No	156	57.8	129	45.9	1.00	-	-
HIV +
Yes	57	40.7	70	41.4	0.97	0.62–1.53	0.90
No	83	59.3	99	58.6	1.00	-	-
AIDS (Caracas Criteria)
Yes	32	15.3	29	12.8	1.32	0.77–2.27	0.31
No	176	84.6	211	87.9	1.00	-	-

ISSN: 1471-2458