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.