Table 3. Demographic and occupational characteristics of a study population (n = 311) linked to a dairy production and livestock facility in Mexico.

Characteristic	No.(%)
	Median (IQR)
Age	36 (27–45)
Men	244/311 (78.0)
Illiteracy	33/308 (10.1)
<6 year of formal education	137/310 (43.3)
Birth in a highly endemic area	104/311 (33.4)
Living inside a cowshed	188/311 (60.4)
Months working/living at daily facility	132 (72–240)
Group of exposure
High	105/309 (33.9)
Medium	145/309 (46.9)
Low	59/309 (17.3)
Daily hours of contact with cattle	6 (0–8)
BCG scar	265/311 (85.2)
Previous contact with TB case	31/308 (10.0)
Consumption of unpasteurized dairy products	93/310 (30.0)
Previous TB diagnosis	4/311 (1.2)

IQR = interquartile range.