Table 3. Significant risk/associated factors for positive tuberculin skin test results after multivariate analysis.

Variables	Factors
	Associated [ref.]	Risk [ref.]
Male sex	-	[16]
Old age	[11], [19]	-
Total duration of work in the correctional system > 12 months	[9], [11], [20], [21]	-
History of Bacillus Calmette-Guérin vaccination	[9]	[16]
Reported history of contact with prisoners	[13]	-
Current tobacco smoking	[20]	-
Country of birth	[19]	[16]
Travel to tuberculosis-endemic countries for >3 months	[9]	-
Region of country	[21]	-

Associated factors extracted from cross-sectional studies and risk factors extracted from cohort studies.