Table 1

Socio-demographic characteristics of the case-control study population
Age
 • Mean age: 37.2 years (± SD 19.6 years)

• Minimum age: 10 years

• Maximum age 81 years
Age distribution
 10–19
 20–29
 30–39
 40–49
 50–59
 60–69
 70–79
 80–89

27
 34
 18
 15
 27
 19
 4
 3
Gender
 • 62% male

• 38% female
Marital status
 • 65% married,

• 35% single, widowed or divorced
Occupation and source of income
 • 95% agriculture

• 93% working in household

• 91% livestock ownership (personal or family)
Cattle
 • 63% of study population owned cattle (personal or family).

• A mean of 3.4 cows were owned by one family (± SD 3.4), ranging from 1 to a maximum of 22 cows.

Zoller et al. BMC Infectious Diseases 2008 8:88   doi:10.1186/1471-2334-8-88