TABLE II. Multivariate conditional logistic analyses for Mycobacterium bovis infections in Brazil.

Block	Step (variable entered)	-2 Log Likelihood	Overall (score) Chi-square (p-value)	Change from previous step Chi-square (p-value)	Change from previous block Chi-square (p-value)
0*	0 (variables not in the equation)	16.248	–	–	–
1**	1*** [extrapulmoary clinical features of tuberculosis (TB)]	11.944	6.298 (0.012)	4.304 (0.038)	4.304 (0.038)
1**	2**** (zoonotic potential exposures and extrapulmonary clinical features of TB)	5.576	8.848 (0.012)	6.368 (0.012)	10.673 (0.005)

^*beginning block number 0, initial Log Likelihood function: −2 Log likelihood: 16.248;

^**beginning block number 1, forward stepwise (likelihood ratio) method;

^***variable entered at step number 1: extrapulmonary clinical features of TB;

^****variables entered at step number 2: zoonotic potential exposures.